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• My father is a doctor. He is insisting on writing a database to store non-critical patient information, with no programming background

  - by Dominic Bou-Samra

  So, my father is currently in the process of "hacking" together a database using FileMaker Pro, a GUI based databasing tool for his small (4 doctor) practice. The database will be used to help ease the burden on reporting from medical machines, streamlining quite a clumsy process. He's got no programming background, and seems to be doing everything in his power to not learn things correctly. He's got duplicate data types, no database-enforced relationships (foreign/primary key constraints) and a dozen other issues. He's doing it all by hand via GUI tool using Youtube videos. My issue is, that whilst I want him to succeed 100%, I don't think it's appropriate for him to be handling these types of decisions. How do I convince him that without some sort of education in these topics, a hacked together solution is a bad idea? He's can be quite stubborn and I think he sees these types of jobs as "childs play" How should I approach this? Is it even that bad an idea - or am I correct in thinking he should hire a proper DBA/developer to handle this so that it doesn't become a maintenance nightmare? NB: I am a developer consultant of 4 years and I've seen my share of painful customer implementations.

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• MAAS/JuJu Clarifications

  - by ectoskeleton

  I really love the concept of MAAS underlying an OpenStack implementation, but there are a few questions about MAAS that I am not entirely clear on. Should all hosts be set to network boot at all times or after they have been registered and allocated as a service, should they boot to disk? After juju bootstrap is executed, I turn on the machine that has been allocated (note WoL isn't working, I suspect it's being blocked on the network), the machine boot's up and then juju status executes correct, agent running and all that good stuff. If I 'reboot' the machine (testing power failure/problem whatever), juju status comes back but the agent-state is no longer in running state, and so far I have to destroy the environment and restart. In all cases I have never been able to deploy any services to any of the other nodes. I deploy the service with juju, note which node it was assigned, and then start the system. The system just boots up into a basic node. If I SSH to it I have to enter password, so it's not setting up the ssh key or anything. This is on Ubuntu 12.04.1 LTS systems and HP GL360G7 hosts. The MAAS management server is running as a VM but all on the same network. At this point I am not sure if I am doing something wrong or if there is a problem somewhere else. Is the idea that anytime a host is rebooted it should be rebuilt from the ground up, or is something else going on behind the scene to tell it to boot the local image. If the latter, why doesn't the agent start on a system that has been successfully setup before (juju bootstrapped system)?

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• Introduction to the ADF Debugger

  - by Shay Shmeltzer

  Not that you'll ever need this blog entry - after all there are never bugs in the code that YOU write. But maybe one day one of your peers will ask you for help debugging their ADF application so here we go... One of the cool features of JDeveloper and ADF is the ADF Debugger - a way to debug the declarative pars of Oracle ADF. The debugger goes beyond your regular Java debugger and shows you in a clear way specific information related to Oracle ADF - things like where are you in the taskflow/region hierarchy, what is in your various scopes, what is the value of a specific EL and much more. However, from the number of posts on OTN where people are saying "I placed a System.out.println() to see what the value was...", it seems that not many are familiar with the power of the debugger. So here is a short demo that shows you some aspects of the debugger such as: Setting breakpoints on various ADF artifacts The ADF structure window The ADF Data window The EL Evaluater window Want to learn more about debugging ADF applications - I highly recommend that you go back in time to 2009 and attend Steve Muench's OOW presentation about ADF debugging. Can't travel in time yet? Then the second best option is to look at his very clear ADF Debugging Slides, which were the inspiration to the above demo.

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• Need Guidance Making HTML5 Canvas Game Engine

  - by Scriptonaut

  So I have some free time this winter break and want to build a simple 2d HTML5 canvas game engine. Mostly a physics engine that will dictate the way objects move and interact(collisions, etc). I made a basic game here: http://caidenhome.com/HTML%205/pong.html and would like to make more, and thought that this would be a good reason to make a simple framework for this stuff. Here are some questions: Does the scripting language have to be Javascript? What about Ruby? I will probably write it with jQuery because of the selecting powers, but I'm curious either way. Are there any great guides you guys know of? I want a fast guide that will help me bust out this engine sometime in the next 2 weeks, hopefully sooner. What are some good conventions I should be aware of? What's the best way to get sound? At the moment I'm using something like this: var audioElement = document.createElement('audio'); audioElement.setAttribute('src', 'paddle_col.wav'); audioElement.load(); I'm interested in making this engine lightweight and extremely efficient, I will do whatever it takes to get great speeds and processing power. I know this question is fairly vague, but I just need a push in the right direction. Thanks :)

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• Just started a job with Scrum. Something seems to be missing. I am new to Scrum

  - by punkouter

  The code is a complete mess of a combination of classic ASP/ASP.NET. The scrum consist of us patching up the big mess or making additions to it. We are all too busy doing that to start a rewrite so I am wondering.. Where is the part in Scrum where the developers can have the power to say that enough is enough and demand that they are given time to start the big rewrite ? We seem in an endless loop of just patching old code with 'Stories'. So things are being run by the non-technical people who seem to have no desire to push for a rewrite because they don't understand how bad the code base has gotten.. So who is in charge of making this big rewrite change happen ? The devs? The scrum master? The current strategy is just find time and do it ourselves without the higher ups involved.. since they are mostly to blame for the current mess we are in.. <-insert rant about non-tech people telling tech people what to do here-

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• YouTube: Chrome Dev Tools Integration with NetBeans IDE!

  - by Geertjan

  Some time ago my colleague David Konecny discussed the question "What works better for you? NetBeans IDE or Chrome Developer Tools?". It's a good read. David highlights the point that it's not a question of either/or but both, since the two tools are like the apple/pear dichotmoy. However, good news! The two worlds are not divided in NetBeans IDE 7.4. Changes you make in Chrome Developer Tools (CDT) are automatically persisted to the related files in NetBeans IDE, as you can see in a new YouTube clip I made today. The new integration of CDT with NetBeans IDE has been mentioned in the NetBeans IDE 7.4 New & Noteworthy, while on Twitter this was sighted yesterday: Watch the movie above and within 5 minutes you too will see the simplicity and power of CDT integration with NetBeans IDE. In other news. I consider the above to be my favorite (though it's a tough choice, since there are so many new features in NetBeans IDE 7.4) new feature, for the article "What is your favorite new NetBeans IDE 7.4 feature?"

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• problems with installation of ubuntu 12.04 (64 and 32 bits)

  - by user76104

  I am a latinoamerican so.. sorry for my english I am trying to install ubuntu on my new pc but I have serious problems. When I put the installation cd and it runs, everything goes fine until that "window" when the user have to decide if want to try ubuntu or install it on the machine.. well that "window" apears in blank, and I see that my mouse and my keyboard turn really slowly and I can't do anything I have to shut it down by pressing power botton. The specification of my pc are this Gigabyte ex58 ud7 i7 950 wester digital caviar black 6gb memory corsair evga gtx580 Please i really neeed to install ubuntu or another linux distrubution, i am usign de sismic unix program on my laptop and well. it burns when i program a script! help! please :) what can i do..? what i have to download? i am not a pro in linux so please :( be pattient with me when it starts to load the achieve ubuntu environment to enter a menu with a graphical environment but I managed to get something sturdy and gave him to try ubuntu, started to load but freezes on the sign of ubuntu with red spots and only shows me the pointer not more ..... any other option? ps: had previously tried to install the alternate version of ubuntu not having success: S

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• Alienware M17x R3: Possible downclock

  - by Ywen

  I installed recently Kubuntu 11.10 32 bits (had graphics driver issues, wanted to try on 32 bits version) on my new Alienware M17x, with a Core i7-2670QM CPU. Cores are supposed to be clocked at 2.2 GHz, however the output of $ cat /proc/cpuinfo | grep -i "hz" gives me: model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 If useful, the AC adapter is plugged in (yet the ouput is the same when the computer is powered only by the battery) and I have Firefox and Eclipse running. Does /proc/cpuinfo reflect a possible automatic downclock made to save power if processor load is low or is this output abnormal? EDIT: Ok, I checked and yes, the ouput does vary in function of the load. I reach 2.2 GHz when needed. But my following problem remains. I was checking my CPU clocking because I experienced poor performances when reading 720p video files on Ubuntu with VLC or mplayer when on battery (and I believe VLC by default only uses CPU, not GPU to decode), whereas I haven't got such problems with VLC on Windows (which made me think it wasn't coming from a BIOS option, plus every option in the BIOS regarding the CPU is turned ON).

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• Is micro-optimisation important when coding?

  - by BozKay

  I recently asked a question on stackoverflow.com to find out why isset() was faster than strlen() in php. This raised questions around the importance of readable code and whether performance improvements of micro-seconds in code were worth even considering. My father is a retired programmer, I showed him the responses and he was absolutely certain that if a coder does not consider performance in their code even at the micro level, they are not good programmers. I'm not so sure - perhaps the increase in computing power means we no longer have to consider these kind of micro-performance improvements? Perhaps this kind of considering is up to the people who write the actual language code? (of php in the above case). The environmental factors could be important - the internet consumes 10% of the worlds energy, I wonder how wasteful a few micro-seconds of code is when replicated trillions of times on millions of websites? I'd like to know answers preferably based on facts about programming. Is micro-optimisation important when coding? EDIT : My personal summary of 25 answers, thanks to all. Sometimes we need to really worry about micro-optimisations, but only in very rare circumstances. Reliability and readability are far more important in the majority of cases. However, considering micro-optimisation from time to time doesn't hurt. A basic understanding can help us not to make obvious bad choices when coding such as if (expensiveFunction() && counter < X) Should be if (counter < X && expensiveFunction()) (example from @zidarsk8) This could be an inexpensive function and therefore changing the code would be micro-optimisation. But, with a basic understanding, you would not have to because you would write it correctly in the first place.

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• Building a Store Locator ASP.NET Application Using Google Maps API (Part 2)

  Last week's article, Building a Store Locator ASP.NET Application Using Google Maps API (Part 1), was the first in a multi-part article series exploring how to add store locator-type functionality to your ASP.NET website using the free Google Maps API. Part 1 started with an examination of the database used to power the store locator, which contains a single table named Stores with columns capturing the store number, its address and its latitude and longitude coordinates. Next, we looked at using Google Maps API's geocoding service to translate a user-entered address, such as San Diego, CA or 92101 into its latitude and longitude coordinates. Knowing the coordinates of the address entered by the user, we then looked at writing a SQL query to return those stores within (roughly) 15 miles of the user-entered address. These nearby stores were then displayed in a grid, listing the store number, the distance from the address entered to each store, and the store's address. While a list of nearby stores and their distances certainly qualifies as a store locator, most store locators also include a map showing the area searched, with markers denoting the store locations. This article looks at how to use the Google Maps API, a sprinkle of JavaScript, and a pinch of server-side code to add such functionality to our store locator. Read on to learn more! Read More >

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• Unable to start lightdm but can startx

  - by wzyboy

  I am trying to make my own Live USB and I have successfully generated an ISO file with a newly installed, configured and customized Xubuntu 12.04 LTS installation. My problem is that, no matter I boot the ISO in VirtualBox or in GRUB with loopback, it just cannot start the lightdm. When booting, I can see the log messages on the screen, it stucks at Stopping System V compablities or Configuring Network security. And tty7 is frozen... If I switch to tty1, I can get a logged-in shell as ubuntu@ubuntu. The weird thing is: When I type sudo start lightdm or just sudo lightdm, it will switch to tty7 and the screen flashes. Then nothing happened. Return to tty1 and I can see lightdm running, process xxxx. But the process does not exist. It was just crashed immediately I think. (That's why the screen flashes.) However, when I type startx, I can get into the desktop! That's amazing for me. I am not very clear about the relationship between X Server and Display Manager, but I think lightdm is running when I see the desktop! Then, what's wrong with sudo start lightdm? I use this command every time I power on my laptop since I have a text parameter added in grub.cfg. It never "crashed immediately". I need to use sudo start lightdm because it gets me into "Xubuntu Session" instead of "Xfce Session", the prior is more beautiful... Could anyone help?

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• Does Hauppauge WinTV HVR-900 (r2) [USB ID 2040:6502] work with ubuntu 12.04 LTS?

  - by nightfly

  I have this DVB+Analog usb tv tuner Hauppauge WinTV HVR-900 (r2) [USB ID 2040:6502]. This used to work under ubuntu 10.04 LTS. But in 12.04 there seems to be a problem. I have linux-firmware-nonfree and ivtv-utils installed. I am running Ubuntu 12.04.1 LTS 64 bit with all updates installed and the default unity environment. When I run mplayer tv:// -tv driver=v4l2:device=/dev/video1:input=1:norm=PAL I get a solid green screen and no picture. Here input 1 is the composite input of the card. MPlayer svn r34540 (Ubuntu), built with gcc-4.6 (C) 2000-2012 MPlayer Team mplayer: could not connect to socket mplayer: No such file or directory Failed to open LIRC support. You will not be able to use your remote control. Playing tv://. TV file format detected. Selected driver: v4l2 name: Video 4 Linux 2 input author: Martin Olschewski comment: first try, more to come ;-) Selected device: Hauppauge WinTV HVR 900 (R2) Tuner cap: Tuner rxs: Capabilities: video capture VBI capture device tuner audio read/write streaming supported norms: 0 = NTSC; 1 = NTSC-M; 2 = NTSC-M-JP; 3 = NTSC-M-KR; 4 = NTSC-443; 5 = PAL; 6 = PAL-BG; 7 = PAL-H; 8 = PAL-I; 9 = PAL-DK; 10 = PAL-M; 11 = PAL-N; 12 = PAL-Nc; 13 = PAL-60; 14 = SECAM; 15 = SECAM-B; 16 = SECAM-G; 17 = SECAM-H; 18 = SECAM-DK; 19 = SECAM-L; 20 = SECAM-Lc; inputs: 0 = Television; 1 = Composite1; 2 = S-Video; Current input: 1 Current format: YUYV v4l2: current audio mode is : MONO v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl query control failed: Invalid argument v4l2: ioctl query control failed: Invalid argument v4l2: ioctl query control failed: Invalid argument v4l2: ioctl query control failed: Invalid argument Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory [vdpau] Error when calling vdp_device_create_x11: 1 ========================================================================== Opening video decoder: [raw] RAW Uncompressed Video Movie-Aspect is undefined - no prescaling applied. VO: [xv] 640x480 = 640x480 Packed YUY2 Selected video codec: [rawyuy2] vfm: raw (RAW YUY2) ========================================================================== Audio: no sound Starting playback... v4l2: select timeout V: 0.0 2/ 2 ??% ??% ??,?% 0 0 v4l2: select timeout V: 0.0 4/ 4 ??% ??% ??,?% 0 0 v4l2: select timeout V: 0.0 6/ 6 ??% ??% ??,?% 0 0 v4l2: select timeout v4l2: 0 frames successfully processed, 1 frames dropped. Exiting... (Quit) Here is the dmesg of the card when plugged in.. [12742.228097] usb 1-4: new high-speed USB device number 3 using ehci_hcd [12742.367289] em28xx: New device WinTV HVR-900 @ 480 Mbps (2040:6502, interface 0, class 0) [12742.367296] em28xx: Audio Vendor Class interface 0 found [12742.367585] em28xx #0: chip ID is em2882/em2883 [12742.550086] em28xx #0: i2c eeprom 00: 1a eb 67 95 40 20 02 65 d0 12 5c 03 82 1e 6a 18 [12742.550104] em28xx #0: i2c eeprom 10: 00 00 24 57 66 07 01 00 00 00 00 00 00 00 00 00 [12742.550120] em28xx #0: i2c eeprom 20: 46 00 01 00 f0 10 02 00 b8 00 00 00 5b e0 00 00 [12742.550135] em28xx #0: i2c eeprom 30: 00 00 20 40 20 6e 02 20 10 01 01 01 00 00 00 00 [12742.550150] em28xx #0: i2c eeprom 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [12742.550165] em28xx #0: i2c eeprom 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [12742.550181] em28xx #0: i2c eeprom 60: 00 00 00 00 00 00 00 00 00 00 18 03 34 00 30 00 [12742.550196] em28xx #0: i2c eeprom 70: 32 00 37 00 38 00 32 00 33 00 39 00 30 00 31 00 [12742.550211] em28xx #0: i2c eeprom 80: 00 00 1e 03 57 00 69 00 6e 00 54 00 56 00 20 00 [12742.550226] em28xx #0: i2c eeprom 90: 48 00 56 00 52 00 2d 00 39 00 30 00 30 00 00 00 [12742.550241] em28xx #0: i2c eeprom a0: 84 12 00 00 05 50 1a 7f d4 78 23 fa fd d0 28 89 [12742.550257] em28xx #0: i2c eeprom b0: ff 00 00 00 04 84 0a 00 01 01 20 77 00 40 1d b7 [12742.550272] em28xx #0: i2c eeprom c0: 13 f0 74 02 01 00 01 79 63 00 00 00 00 00 00 00 [12742.550287] em28xx #0: i2c eeprom d0: 84 12 00 00 05 50 1a 7f d4 78 23 fa fd d0 28 89 [12742.550302] em28xx #0: i2c eeprom e0: ff 00 00 00 04 84 0a 00 01 01 20 77 00 40 1d b7 [12742.550317] em28xx #0: i2c eeprom f0: 13 f0 74 02 01 00 01 79 63 00 00 00 00 00 00 00 [12742.550334] em28xx #0: EEPROM ID= 0x9567eb1a, EEPROM hash = 0x2bbf3bdd [12742.550338] em28xx #0: EEPROM info: [12742.550340] em28xx #0: AC97 audio (5 sample rates) [12742.550343] em28xx #0: 500mA max power [12742.550346] em28xx #0: Table at 0x24, strings=0x1e82, 0x186a, 0x0000 [12742.552590] em28xx #0: Identified as Hauppauge WinTV HVR 900 (R2) (card=18) [12742.555516] tveeprom 15-0050: Hauppauge model 65018, rev B2C0, serial# 1292061 [12742.555523] tveeprom 15-0050: tuner model is Xceive XC3028 (idx 120, type 71) [12742.555529] tveeprom 15-0050: TV standards PAL(B/G) PAL(I) PAL(D/D1/K) ATSC/DVB Digital (eeprom 0xd4) [12742.555534] tveeprom 15-0050: audio processor is None (idx 0) [12742.555537] tveeprom 15-0050: has radio [12742.570297] tuner 15-0061: Tuner -1 found with type(s) Radio TV. [12742.570327] xc2028 15-0061: creating new instance [12742.570332] xc2028 15-0061: type set to XCeive xc2028/xc3028 tuner [12742.573685] xc2028 15-0061: Loading 80 firmware images from xc3028-v27.fw, type: xc2028 firmware, ver 2.7 [12742.624056] xc2028 15-0061: Loading firmware for type=BASE MTS (5), id 0000000000000000. [12744.126591] xc2028 15-0061: Loading firmware for type=MTS (4), id 000000000000b700. [12744.153586] xc2028 15-0061: Loading SCODE for type=MTS LCD NOGD MONO IF SCODE HAS_IF_4500 (6002b004), id 000000000000b700. [12744.280963] Registered IR keymap rc-hauppauge [12744.281151] input: em28xx IR (em28xx #0) as /devices/pci0000:00/0000:00:1a.7/usb1/1-4/rc/rc1/input10 [12744.281541] rc1: em28xx IR (em28xx #0) as /devices/pci0000:00/0000:00:1a.7/usb1/1-4/rc/rc1 [12744.282454] em28xx #0: Config register raw data: 0xd0 [12744.284709] em28xx #0: AC97 vendor ID = 0xffffffff [12744.285829] em28xx #0: AC97 features = 0x6a90 [12744.285832] em28xx #0: Empia 202 AC97 audio processor detected [12744.359211] em28xx #0: v4l2 driver version 0.1.3 [12744.404066] xc2028 15-0061: Loading firmware for type=BASE F8MHZ MTS (7), id 0000000000000000. [12745.915089] MTS (4), id 00000000000000ff: [12745.915100] xc2028 15-0061: Loading firmware for type=MTS (4), id 0000000100000007. [12746.161668] em28xx #0: V4L2 video device registered as video1 [12746.161673] em28xx #0: V4L2 VBI device registered as vbi0 [12746.162845] em28xx-audio.c: probing for em28xx Audio Vendor Class [12746.162848] em28xx-audio.c: Copyright (C) 2006 Markus Rechberger [12746.162851] em28xx-audio.c: Copyright (C) 2007-2011 Mauro Carvalho Chehab [12746.221099] xc2028 15-0061: attaching existing instance [12746.221105] xc2028 15-0061: type set to XCeive xc2028/xc3028 tuner [12746.221109] em28xx #0: em28xx #0/2: xc3028 attached [12746.221113] DVB: registering new adapter (em28xx #0) [12746.221118] DVB: registering adapter 0 frontend 0 (Micronas DRXD DVB-T)... [12746.221869] em28xx #0: Successfully loaded em28xx-dvb [13111.196055] xc2028 15-0061: Loading firmware for type=BASE F8MHZ MTS (7), id 0000000000000000. [13112.720062] MTS (4), id 00000000000000ff: [13112.720072] xc2028 15-0061: Loading firmware for type=MTS (4), id 0000000100000007. [13214.956057] xc2028 15-0061: Loading firmware for type=BASE F8MHZ MTS (7), id 0000000000000000. [13216.479806] MTS (4), id 00000000000000ff: [13216.479816] xc2028 15-0061: Loading firmware for type=MTS (4), id 0000000100000007. [13276.408056] xc2028 15-0061: Loading firmware for type=BASE F8MHZ MTS (7), id 0000000000000000. [13277.932093] MTS (4), id 00000000000000ff: [13277.932104] xc2028 15-0061: Loading firmware for type=MTS (4), id 0000000100000007. [13305.032076] xc2028 15-0061: Loading firmware for type=BASE F8MHZ MTS (7), id 0000000000000000. [13306.556449] MTS (4), id 00000000000000ff: [13306.556460] xc2028 15-0061: Loading firmware for type=MTS (4), id 0000000100000007. [13392.236055] xc2028 15-0061: Loading firmware for type=BASE F8MHZ MTS (7), id 0000000000000000. [13393.760123] MTS (4), id 00000000000000ff: [13393.760133] xc2028 15-0061: Loading firmware for type=MTS (4), id 0000000100000007. [13637.534053] usb 1-4: USB disconnect, device number 3 [13637.534183] em28xx #0: disconnecting em28xx #0 video [13637.560214] em28xx #0: V4L2 device vbi0 deregistered [13637.560335] em28xx #0: V4L2 device video1 deregistered [13637.561237] xc2028 15-0061: destroying instance [13639.772120] usb 1-4: new high-speed USB device number 4 using ehci_hcd [13639.911351] em28xx: New device WinTV HVR-900 @ 480 Mbps (2040:6502, interface 0, class 0) [13639.911357] em28xx: Audio Vendor Class interface 0 found [13639.911637] em28xx #0: chip ID is em2882/em2883 [13640.094262] em28xx #0: i2c eeprom 00: 1a eb 67 95 40 20 02 65 d0 12 5c 03 82 1e 6a 18 [13640.094280] em28xx #0: i2c eeprom 10: 00 00 24 57 66 07 01 00 00 00 00 00 00 00 00 00 [13640.094295] em28xx #0: i2c eeprom 20: 46 00 01 00 f0 10 02 00 b8 00 00 00 5b e0 00 00 [13640.094311] em28xx #0: i2c eeprom 30: 00 00 20 40 20 6e 02 20 10 01 01 01 00 00 00 00 [13640.094326] em28xx #0: i2c eeprom 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [13640.094341] em28xx #0: i2c eeprom 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [13640.094356] em28xx #0: i2c eeprom 60: 00 00 00 00 00 00 00 00 00 00 18 03 34 00 30 00 [13640.094371] em28xx #0: i2c eeprom 70: 32 00 37 00 38 00 32 00 33 00 39 00 30 00 31 00 [13640.094386] em28xx #0: i2c eeprom 80: 00 00 1e 03 57 00 69 00 6e 00 54 00 56 00 20 00 [13640.094401] em28xx #0: i2c eeprom 90: 48 00 56 00 52 00 2d 00 39 00 30 00 30 00 00 00 [13640.094416] em28xx #0: i2c eeprom a0: 84 12 00 00 05 50 1a 7f d4 78 23 fa fd d0 28 89 [13640.094432] em28xx #0: i2c eeprom b0: ff 00 00 00 04 84 0a 00 01 01 20 77 00 40 1d b7 [13640.094447] em28xx #0: i2c eeprom c0: 13 f0 74 02 01 00 01 79 63 00 00 00 00 00 00 00 [13640.094462] em28xx #0: i2c eeprom d0: 84 12 00 00 05 50 1a 7f d4 78 23 fa fd d0 28 89 [13640.094477] em28xx #0: i2c eeprom e0: ff 00 00 00 04 84 0a 00 01 01 20 77 00 40 1d b7 [13640.094492] em28xx #0: i2c eeprom f0: 13 f0 74 02 01 00 01 79 63 00 00 00 00 00 00 00 [13640.094509] em28xx #0: EEPROM ID= 0x9567eb1a, EEPROM hash = 0x2bbf3bdd [13640.094512] em28xx #0: EEPROM info: [13640.094515] em28xx #0: AC97 audio (5 sample rates) [13640.094517] em28xx #0: 500mA max power [13640.094521] em28xx #0: Table at 0x24, strings=0x1e82, 0x186a, 0x0000 [13640.097391] em28xx #0: Identified as Hauppauge WinTV HVR 900 (R2) (card=18) [13640.099617] tveeprom 15-0050: Hauppauge model 65018, rev B2C0, serial# 1292061 [13640.099623] tveeprom 15-0050: tuner model is Xceive XC3028 (idx 120, type 71) [13640.099629] tveeprom 15-0050: TV standards PAL(B/G) PAL(I) PAL(D/D1/K) ATSC/DVB Digital (eeprom 0xd4) [13640.099634] tveeprom 15-0050: audio processor is None (idx 0) [13640.099637] tveeprom 15-0050: has radio [13640.112849] tuner 15-0061: Tuner -1 found with type(s) Radio TV. [13640.112877] xc2028 15-0061: creating new instance [13640.112882] xc2028 15-0061: type set to XCeive xc2028/xc3028 tuner [13640.115930] xc2028 15-0061: Loading 80 firmware images from xc3028-v27.fw, type: xc2028 firmware, ver 2.7 [13640.164057] xc2028 15-0061: Loading firmware for type=BASE MTS (5), id 0000000000000000. [13641.666643] xc2028 15-0061: Loading firmware for type=MTS (4), id 000000000000b700. [13641.693262] xc2028 15-0061: Loading SCODE for type=MTS LCD NOGD MONO IF SCODE HAS_IF_4500 (6002b004), id 000000000000b700. [13641.820765] Registered IR keymap rc-hauppauge [13641.820958] input: em28xx IR (em28xx #0) as /devices/pci0000:00/0000:00:1a.7/usb1/1-4/rc/rc2/input11 [13641.821335] rc2: em28xx IR (em28xx #0) as /devices/pci0000:00/0000:00:1a.7/usb1/1-4/rc/rc2 [13641.822256] em28xx #0: Config register raw data: 0xd0 [13641.824526] em28xx #0: AC97 vendor ID = 0xffffffff [13641.825503] em28xx #0: AC97 features = 0x6a90 [13641.825507] em28xx #0: Empia 202 AC97 audio processor detected [13641.899015] em28xx #0: v4l2 driver version 0.1.3 [13641.944064] xc2028 15-0061: Loading firmware for type=BASE F8MHZ MTS (7), id 0000000000000000. [13643.470765] MTS (4), id 00000000000000ff: [13643.470776] xc2028 15-0061: Loading firmware for type=MTS (4), id 0000000100000007. [13643.717713] em28xx #0: V4L2 video device registered as video1 [13643.717718] em28xx #0: V4L2 VBI device registered as vbi0 [13643.718770] em28xx-audio.c: probing for em28xx Audio Vendor Class [13643.718775] em28xx-audio.c: Copyright (C) 2006 Markus Rechberger [13643.718778] em28xx-audio.c: Copyright (C) 2007-2011 Mauro Carvalho Chehab [13643.777148] xc2028 15-0061: attaching existing instance [13643.777154] xc2028 15-0061: type set to XCeive xc2028/xc3028 tuner [13643.777158] em28xx #0: em28xx #0/2: xc3028 attached [13643.777162] DVB: registering new adapter (em28xx #0) [13643.777167] DVB: registering adapter 0 frontend 0 (Micronas DRXD DVB-T)... [13643.777876] em28xx #0: Successfully loaded em28xx-dvb And here goes the lsmod output lsmod|grep em28xx em28xx_dvb 18579 0 dvb_core 110619 1 em28xx_dvb em28xx_alsa 18305 0 em28xx 109365 2 em28xx_dvb,em28xx_alsa v4l2_common 16454 3 tuner,tvp5150,em28xx videobuf_vmalloc 13589 1 em28xx videobuf_core 26390 2 em28xx,videobuf_vmalloc rc_core 26412 10 rc_hauppauge,ir_lirc_codec,ir_mce_kbd_decoder,ir_sony_decoder,ir_jvc_decoder,ir_rc6_decoder,ir_rc5_decoder,em28xx,ir_nec_decoder snd_pcm 97188 3 em28xx_alsa,snd_hda_intel,snd_hda_codec tveeprom 21249 1 em28xx videodev 98259 5 tuner,tvp5150,em28xx,v4l2_common,uvcvideo snd 78855 14 em28xx_alsa,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device Isn't this driver mainline now? Or this card is not supported? Or the analog functionality is screwed? I need the analog capture working for this card. Please help!

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• Considering Embedding a Database? Choose MySQL!

  - by Bertrand Matthelié

  The M of the LAMP stack and the #1 database for Web-based applications, MySQL is also an extremely popular choice as embedded database. Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Access our Resource Kit to discover the top reasons why:   3,000 ISVs and OEMs rely on MySQL as their embedded database 8 of the top 10 software vendors and hundreds of startups selected MySQL to power their cloud, on-premise and appliance-based offerings Leading mobile and SaaS providers ensure continuous service availability and scalability with lower cost and risk using MySQL Cluster. Learn how you can reduce costs and accelerate time to market while increasing performance and reliability. Access white papers, webinars, case studies and other resources in our Resource Kit.  

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• How do I fix a garbled screen on a Gateway LT3103u?

  - by paracaudex

  I've been having garbled screen problems on a Gateway LT3103u on Ubuntu for a while. I just did a fresh install of Ubuntu 11.10 and continue to have issues. I installed xubuntu-desktop in case the issues had to do with the sophisticated GNOME graphics. The problem is less bad, but it's still there. After a few minutes of using XFCE, the screen gets garbled. I assume this has something to do with the graphics card, but I don't know how to go about troubleshooting something like this. Where should I start? Update: Here is the description of the VGA card from lspci -vvv: 01:05.0 VGA compatible controller: ATI Technologies Inc RS690M [Radeon X1200 Series] (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device 028c Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast TAbort- SERR- [disabled] Capabilities: [50] Power Management version 2 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit+ Address: 0000000000000000 Data: 0000 Kernel driver in use: radeon Kernel modules: radeon Update: Setting GRUB_CMDLINE_LINUX="nomodeset" in /etc/default/grub seems to have fixed it in both Ubuntu and xubuntu-desktop. I will test it for a day or so to see if the problems recur and then post more detail with some links to an explanation. Update 2: It is possible to use this fix for Nvidia card (GTX 260) when graphics is defective after 11.10 upgrade/install? First few restarts was graphic ok, then after few restarts begins suddenly be defective and it stay so. I must returned to 11.04 because this problem and I wait for 12.04. So I hope in this fix.

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• MMORPG design for time-limited players

  - by Philipp

  I believe that there is a significant market of players who would enjoy the exploration and interaction aspects of MMORPGs, but simply don't have the time for the endless grinding marathons which are part of the average MMORPG. MMORPGs are all about interaction between players. But when different players have different amounts of time to invest into a game, those with less time to spend will soon lack behind their power-leveling friends and won't be able to interact with them anymore. One way to solve this would be to limit the progress a player can achieve per day, so that it simply doesn't make sense to play more than one or two hours a day. But even the busiest casual players sometimes like to spend a whole sunday afternoon playing a video game. Just stopping them after two hours would be really frustrating. It also creates a pressure to use the daily progress limit every day, because otherwise the player would feel like wasting something. This pressure would be detrimental for casual gamers. What else could be done to level the playing field between those players who play 40+ hours a week and those who can't play more than 10?

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• Dark screen when wake / Unable to control screen brightness

  - by John

  Running Ubuntu 11.04 on Lenovo ThinkPad with an Nvida graphics card. The unit goes to sleep when the lid is shut. (The unit goes to suspend mode (not to disk/hibernate), AC gets turned off, running on battery) Upon lid-open sometimes the screen is almost too dark to read. I'm really not sure of the exact cause, (very low batt??). The only fix is a reboot. The screen brightness buttons have never worked in Ubuntu. I have messed w/ the power management preferences. No change. At one point I messed w/ the gnome settings. No change. I have tried a few cmds: echo 9>/sys/class/backlight/acpi_video0/brightness setpci -s 00:02.0 F4.B=10 xgamma -gamma .75 None of these help. Most have zero effect. I think it is and acpi thing, but that is just a guess. I'm out of idea's, and looking for suggestions. Thanks

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• The Ideal Platform for Oracle Database 12c In-Memory and in-memory Applications

  - by Michael Palmeter (Engineered Systems Product Management)

  Oracle SuperCluster, Oracle's SPARC M6 and T5 servers, Oracle Solaris, Oracle VM Server for SPARC, and Oracle Enterprise Manager have been co-engineered with Oracle Database and Oracle applications to provide maximum In-Memory performance, scalability, efficiency and reliability for the most critical and demanding enterprise deployments. The In-Memory option for the Oracle Database 12c, which has just been released, has been specifically optimized for SPARC servers running Oracle Solaris. The unique combination of Oracle's M6 32 Terabytes Big Memory Machine and Oracle Database 12c In-Memory demonstrates 2X increase in OLTP performance and 100X increase in analytics response times, allowing complex analysis of incredibly large data sets at the speed of thought. Numerous unique enhancements, including the large cache on the SPARC M6 processor, massive 32 TB of memory, uniform memory access architecture, Oracle Solaris high-performance kernel, and Oracle Database SGA optimization, result in orders of magnitude better transaction processing speeds across a range of in-memory workloads. Oracle Database 12c In-Memory The Power of Oracle SuperCluster and In-Memory Applications (Video, 3:13) Oracle’s In-Memory applications Oracle E-Business Suite In-Memory Cost Management on the Oracle SuperCluster M6-32 (PDF) Oracle JD Edwards Enterprise One In-Memory Applications on Oracle SuperCluster M6-32 (PDF) Oracle JD Edwards Enterprise One In-Memory Sales Advisor on the SuperCluster M6-32 (PDF) Oracle JD Edwards Enterprise One Project Portfolio Management on the SuperCluster M6-32 (PDF)

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• SharePoint Saturday DC 2010 Slides, Demo Scripts, and Pictures

  - by Brian Jackett

  Wow! This past weekend I attended SharePoint Saturday Washington DC (SPSDC) which was quite an event to say the least.  For those unfamiliar, SharePoint Saturday is a community driven event where various speakers gather to present at a FREE conference on all topics related to SharePoint.  This made my fifth SharePoint Saturday attended and fourth I’ve spoken at.  SPSDC was a bit different than most SharePoint Saturdays mostly due to the scale of it.  We had almost 950 attendees, over 80 speakers presenting close to 90 sessions, and dozens of sponsors.  A big thanks goes out to the organizers of this event.  They put in a lot of hard work and time to pull this event off and should be very proud of the end result.      For SPSDC I presented “The Power of PowerShell + SharePoint 2007”.  I want to thank all of the attendees of my session for coming and asking some great questions.  Below you can find the slides and demo scripts for this session.  I also took some photos throughout the day (not as many as usual since so much going on) so check them out.  If you have any follow up questions feel free to drop me a line in the comments or the contact link at the top of the site.   Slides and Scripts Click here for the demo scripts and slides posted on my SkyDrive. VERY IMPORTANT NOTE: One thing I forgot to mention in my presentation.  In order to run code against the SharePoint API you need to load the Microsoft.SharePoint.dll assembly first.  Run the below command on the PowerShell console line to complete that:   [void][System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint") Photos Facebook album -or- My album on Windows Live site (higher res shots). View Full Album         -Frog Out

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• Oracle Database Appliance and Remarketers - A Whole New Opportunity

  - by Martin Morganti

  We have recently had another exciting announcement for the remarketer initiative. The Oracle Database Appliance is now available for resale through your authorized Value Added Distributor. This means that with no fees, no barriers and no upfront commitments, a remarketer can identify and close transactions for the Oracle Database Appliance without having to sign an Oracle contract. In addition, the remarketer is now authorized to sell the Oracle Database Appliance with Oracle Database 11G Enterprise Edition, RAC or RAC One Node software included in the transaction. The availability of the Oracle Database Appliance for remarketers means that a broad base of customers through remarketers can now start engaging with Oracle by taking advantage of this engineered system technology; basically Oracle Hardware and Software Engineered to Work Together to drive incremental revenue. The Oracle Database Appliance is a simple, reliable and affordable way to rapidly deploy a database cluster by plugging in the power; the network and pushing the one button install for the Appliance Manager software. Find out more about the Oracle Database Appliance, including a webinar by Oracle President Mark Hurd, as well as other material to help you better understand the opportunity available to you as remarketers. If you want Oracle to keep you informed about developments in Remarketer complete the free registration, or talk to your local Oracle Remarketer Authorized value added distributors. (Complete list available on the Oracle Remarketer page).

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• Read-only lock on a SharePoint site collection, or Why can't I edit anymore?

  - by PeterBrunone

  Monday morning, the calls started.  For some reason, long-time users were unable to edit list items.  I figured we had a permissions issue, so I popped in to look at the Site Settings -- and found that I couldn't.  A quick trip to Central Administration showed that I was still listed as a Site Collection Administrator, but I had no power at all on the site collection in question.A quick glance at the logs told me that the server had recently shut down unexpectedly (this is a Hyper-V virtual machine).  Apparently, in the confusion, somehow SharePoint decided to lock the site collection as Read Only.  This can be remedied in one of two ways:1)  In Central Administration, go to Application Management->SharePoint Site Management->Site collection quotas and locks.  Once you have arrived, select the correct application and site collection, and you will have the opportunity to view and set the lock status of the collection (it most likely will be set to "Read-only", and you'll want to move that radio button to "Not locked").2)  Fire up stsadm and issue the following command:stsadm -o setsitelock -url http://myportalsitecollection -lock none

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• Documenting mathematical logic in code

  - by Kiril Raychev

  Sometimes, although not often, I have to include math logic in my code. The concepts used are mostly very simple, but the resulting code is not - a lot of variables with unclear purpose, and some operations with not so obvious intent. I don't mean that the code is unreadable or unmaintainable, just that it's waaaay harder to understand than the actual math problem. I try to comment the parts which are hardest to understand, but there is the same problem as in just coding them - text does not have the expressive power of math. I am looking for a more efficient and easy to understand way of explaining the logic behind some of the complex code, preferably in the code itself. I have considered TeX - writing the documentation and generating it separately from the code. But then I'd have to learn TeX, and the documentation will not be in the code itself. Another thing I thought of is taking a picture of the mathematical notations, equations and diagrams written on paper/whiteboard, and including it in javadoc. Is there a simpler and clearer way? P.S. Giving descriptive names(timeOfFirstEvent instead of t1) to the variables actually makes the code more verbose and even harder too read.

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• OpenGL ES 2.0 texture distortion on large geometry

  - by Spruce

  OpenGL ES 2.0 has serious precision issues with texture sampling - I've seen topics with a similar problem, but I haven't seen a real solution to this "distorted OpenGL ES 2.0 texture" problem yet. This is not related to the texture's image format or OpenGL color buffers, it seems like it's a precision error. I don't know what specifically causes the precision to fail - it doesn't seem like it's just the size of geometry that causes this distortion, because simply scaling vertex position passed to the the vertex shader does not solve the issue. Here are some examples of the texture distortion: Distorted Texture (on OpenGL ES 2.0): http://i47.tinypic.com/3322h6d.png What the texture normally looks like (also on OpenGL ES 2.0): http://i49.tinypic.com/b4jc6c.png The texture issue is limited to small scale geometry on OpenGL ES 2.0, otherwise the texture sampling appears normal, but the grainy effect gradually worsens the further the vertex data is from the origin of XYZ(0,0,0) These texture issues do not occur on desktop OpenGL (works fine under Windows XP, Windows 7, and Mac OS X) I've only seen the problem occur on Android, iPhone, or WebGL(which is similar to OpenGL ES 2.0) All textures are power of 2 but the problem still occurs Scaling the vertex data - The values of a vertex's X Y Z location are in the range of: -65536 to +65536 floating point I realized this was large, so I tried dividing the vertex positions by 1024 to shrink the geometry and hopefully get more accurate floating point precision, but this didn't fix or lessen the texture distortion issue Scaling the modelview or scaling the projection matrix does not help Changing texture filtering options does not help Disabling mipmapping, or using GL_NEAREST/GL_LINEAR does nothing Enabling/disabling anisotropic does nothing The banding effect still occurs even when using GL_CLAMP Dividing the texture coords passed to the vertex shader and then multiplying them back to the correct values in the fragment shader, also does not work precision highp sampler2D, highp float, highp int - in the fragment or the vertex shader didn't change anything (lowp/mediump did not work either) I'm thinking this problem has to have been solved at one point - Seeing that OpenGL ES 2.0 -based games have been able to render large-scale, highly detailed geometry

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• What is the advantage to using a factor of 1024 instead of 1000 for disk size units?

  - by Joe Z.

  When considering the disk space of a storage medium, normally the computer or operating system will represent it in terms of powers of 1024 - a kilobyte is 1,024 bytes, a megabyte is 1,048,576 bytes, a gigabyte is 1,073,741,824 bytes, and so on. But I don't see any practical reason why this convention was adopted. Usually when disk size is represented in kilo-, mega-, or giga-bytes, it has to be converted into decimal first. In places where a power-of-two byte count actually matters (like the block size on a file system), the size is given in bytes anyway (e.g. 4096 bytes). Was it just a little aesthetic novelty that computer makers decided to adopt, but storage medium vendors decided to disregard? Whenever you buy a hard drive, there's always a disclaimer nowadays that says "One gigabyte means one billion bytes". It would feel like using the binary definition of "gigabyte" would artificially inflate the byte count of a device, making drive-makers have to pack 1.1 terabytes into a drive in order to have it show up as "1 TB", or to simply pack 1 terabyte in and have it show up as "931 GB" (and most of them do the latter). Some people have decided to use units like "KiB" or "MiB" in favour of "KB" and "MB" in order to distinguish the two. But is there any merit to the binary prefixes in the first place? There's probably a bit of old history I'm not aware of on this topic, and if there is, I'm looking for somebody to explain it. (Apologies if this is in the wrong place. I felt that a question on best practice might belong here, but I have faith that it will be migrated to the right place if it's incorrect.)

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• Metaphor for task synchronization [closed]

  - by nkint

  I'm looking for a metaphor. A friend of mine taught me to use metaphors from nature, everyday life, math, and use them to design my projects. They can help in creating a better design or better understanding or the problem, and they are cool. Now I'm working on a project with hardware and micro-controllers in C. For convenience, I have decided to use multiple micro-controllers as co-processor units for real-time (the slaves) and a master. This has saved me a lot of headache: I can code the main logic in the master without paying too much attention to super optimizing everything; I don't care if I need some blocking-call; I don't worry about serial communication with the computer. I just send messages to the slaves and they are super fast super in real time. I like my design and it seems to work well. So here are the important concepts that I'm trying capture in the metaphor: hierarchy of processing Not using one big brain but rather several small, distributed brain units using distributed power or resources I'm looking for a good metaphor for this concept of having one unit synchronize the work of all the others. Preferably, the metaphor would come from nature, biology, or zoology.

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• Canon MG6100 series USB printer receives job but doesn't physically print

  - by Old-linux-fan

  Printer MP6150 driver installed itself upon plugging in the printer. Printer is recognized (lsusb shows it) but does not mount. If the printer is recognized, the driver must be working (or?), but something is blocking the system from mounting the printer. Tried the usual things: power of printer, restart Ubuntu etc. Listed below result of lsusb and fstab: hans@kontor-linux:~$ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 004: ID 04a9:174a Canon, Inc. Bus 002 Device 002: ID 1058:1001 Western Digital Technologies, Inc. External Hard Disk [Elements] Bus 004 Device 002: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser hans@kontor-linux:~$ sudo cat /etc/fstab [sudo] password for hans: # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda6 during installation UUID=eaf3b38d-1c81-4de9-98d4-3834d674ff6e / ext4 errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=93a667d3-6132-45b5-ad51-1f8a46c5b437 none swap sw 0 0

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