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• bootstraping a SparkleShare project

  - by WoJ

  I just tried SparkleShare as a possible replacement for dropbox/insynch. It looks quite promising, being based on open standards. I was wondering if someone has gone though the process of "bootstraping" a SparkleShare project. I have the initial files I would like to keep synchronized on two clients and the server (as plain files). I was wondering if there would be a way to set a project up so that I would not need to download/upload all the files back and forth (as they are readily available on all three systems). I guess this would involve some git kung-fu I am far from mastering. Thanks!

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• Tell me why I should bother using Linux if it's all about problems getting the OS to install or work properly? [closed]

  - by Vilhjalmur Magnussin

  Why should I spend day's trying to get Ubuntu to either install and/or work properly? I'm using an Acer Timeline X laptop and if I install 10.04 the wireless doesn't work, and if I try installing 11.04 it either won't install, or if it installs it's full of bugs causing my computer to freeze all the time. So please, I'm all open ears. Someone give me one or two good reasons to continue wasting time (in hope it eventually works) before I decide to focus my time on other things like productivity (using Windows like I've been doing successfully the last 10 years). This is the second time I give Ubuntu a try, the first time was in 2010 using Ubuntu Studio and Ubuntu Desktop, and it ended with me shifting back to Windows since I had spent more time getting everything to work than actually working while trying Ubuntu. I really don't understand why it needs to be like this. Why go on trying when all I see is forums full of discussions about problems which people are having difficulties fixing. Or maybe there is just one special type of computer which works well with Linux? Would very much like to know which computer that is. SO please, if it's not to much trouble I really want to here from someone who has something good to say about going through all this trouble just to get a working environment up and running since I already have a working environment up and running called Windows. Thanks, Villi.

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• Change Linux console screen blanking behavior

  - by quack quixote

  How do I change the screen blanking behavior on Linux virtual terminals? For example, if I switch to a VT from X, login, and leave the system alone for 5 minutes or so, the screen will blank like a screensaver. It comes back with any keypress, like a screensaver. Mostly I just want to change the timeout, but I'm also interested in other settings. If it helps, one of my systems is running Ubuntu 10.04 with the stock graphics drivers. fbset shows the console using the radeondrmfb framebuffer device.

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• Desktop goes un-usable after upgrade to 12.04

  - by Tom Nail

  I have multiple Ubuntu systems connected to a KVM, one of which I recently upgraded from Ubuntu 10 to 12.04. After the upgrade, this system desktop does fine until it is allowed to go to idle (i.e., I've switched to another system on the KVM and it locks it's desktop). When I come back to it, the screen is garbled and paging across at a rate seemingly determined by the mouse. Although no pointer is visible, I can get the screen to stop paging (and just be garbled) by moving the mouse left and right. The paging will slow down and come to a stop, if I can align things carefully enough. This condition persists even when I try to go to a CLI-based login (e.g., CTRL+Alt+F1) and will continue until I reboot the machine. Unfortunately, I'm not very familiar with the Unity desktop, so I don't know where to find things to troubleshoot. A restart of lightdm doesn't change anything, so I'm wondering if this might be more hardware based( although this machine hasn't given me any trouble previously in the same setup). The .xsession-errors file has some issues with compiz, nautilus and GConf listed, but I'm not sure those are actually germane to the issue. Thanks for any help, -=Tom

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• External display resolution issue

  - by Steven

  I'm new to Ubuntu. I've 'dabbled' in the past but Windows was annoying me too much so I finally made the change. One thing I use my laptop for is outputting the screen onto an external monitor. In Windows this usually works fine (but when there is an issue, it's a pain to resolve and has crashed my computer on many occasions). In Ubuntu it's a very simple case of "plug and play" because it displays the content immediately with no major problems. However, I can only alter the resolution of the external display to 4:3 formats, whereas the external monitor is 16:9, so the picture is stretched. In Windows there's loads of resolutions to choose from. If I disable the laptop's screen, it still doesn't allow me to display the correct resolution externally (on VGA). Further to that, if I close the laptop it keeps the external screen as it is, but when I reopen the laptop, the laptop screen doesn't turn back on until I restart. If it's a video I am watching, I can use VLC to alter the aspect ratio so the video looks fine, but it's quite an annoying work around. I used terminal to find my graphics controller, which is "Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)" (not great, I know... the laptop was a free gift with my mobile!) Any idea of how I can get the resolution on the external monitor to be correct?

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• The Correct Usage of DLLs with a DirectX Game?

  - by smoth190

  I'm using DirectX 10 (in C++) to make a game engine, and a test driver program on top of it. Now that I've written many messy rough drafts of an engine, I want to make the final (or sorta final) clean version. I choose to follow how I've seen other engines do it, and that's to have all the core nasty messy crap in a DLL, and then you can create games with just a few functions (well, not really :D). However, I'm unsure of what nasty messy crap to put in that DLL. I don't know about speed restrictions with DLLs. What I've done is put my winproc in the DLL, and have a class that takes the messages, and sends them through to the program using the DLL. Then that program does what it needs to do, and calls a rendering functions back in the DLL that renders everything. Only problem is it gets very low FPS (2, to be exact...). I've looked through everything, and I don't know if the way I'm using DLLs in causing this, or its something different. Whether it's the DLLs or not, I still want to know how to use a DLL correctly with a game engine. I like being neat, I hate having to see all those long names of DirectX classes. I use typedef a lot.

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• Every file on cPanel got deleted (then restored hours later), and I have no idea why

  - by mcranston18

  I apologize in advance if I don't provide proper detail; I am new to server stuff and am looking for general advice about this issue: I was helping out a client doing web design last month. They have about a dozen static sites on one server. The sites are all built on Joomla, except one which I built on Wordpress. Everything was working fine last month when we did the redesign but all of a sudden this morning, every single file on their server got deleted: every web page, file, and all e-mail addresses. I phoned the hosting company (alliancewww.com) to ask, "why did every single file suddenly delete off the server?" They said, "because someone must have deleted it." I said, "well no one did." (Which I'm pretty damn sure no one did.) They said, "you can pay us to look into the problem." I authorized $150 for them to look into the problem. About an hour later, everything was magically re-instated. The host said they had a back-up of everything and just restored everything. What I'm wondering: Does anyone have recommendations of logs I can go through to investigate how the files got deleted in the first place? I've checked out their cPanel logs but found nothing. Is it likely that this is a mess-up on the host's part?

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• Simple dig output?

  - by knocte

  In a script I want to be able to write an IP address to somewhere easily, so I thought using dig (or a similar command) with back-ticks. However the simplest output I've been able to come up to wrt dig parameters is > dig -t A +noall +answer www.google.com www.google.com. 300 IN A 173.194.66.106 www.google.com. 300 IN A 173.194.66.104 Any way (extra arg, different tool instead of dig?) to get rid of the junk apart from the IP address?? (And please don't tell me to use sed.) Thanks

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• OpenGL lighting with dynamic geometry

  - by Tank

  I'm currently thinking hard about how to implement lighting in my game. The geometry is quite dynamic (fixed 3D grid with custom geometry in each cell) and needs some light to get more depth and in general look nicer. A scene in my game always contains sunlight and local light sources like lamps (point lights). One can move underground, so sunlight must be able to illuminate as far as it can get. Here's a render of a typical situation: The lamp is positioned behind the wall to the top, and in the hollow cube there's a hole in the back, so that light can shine through. (I don't want soft shadows, this is just for illustration) While spending the whole day searching through Google, I stumbled on some keywords like deferred rendering, forward rendering, ambient occlusion, screen space ambient occlusion etc. Some articles/tutorials even refer to "normal shading", but to be honest I don't really have an idea to even do simple shading. OpenGL of course has a fixed lighting pipeline with 8 possible light sources. However they just illuminate all vertices without checking for occluding geometry. I'd be very thankful if someone could give me some pointers into the right direction. I don't need complete solutions or similar, just good sources with information understandable for someone with nearly no lighting experience (preferably with OpenGL).

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• First ATMs programming language

  - by revo

  First ATMs performed tasks like a cash dispenser, they were offline machines which worked with punch cards impregnated with Carbon and a 6-digit PIN code. Maximum withdrawal with a card was 10 pounds and each one was a one-time use card - ATM swallowed cards! The first ATM was installed in London in the year 1967, as I looked at time line of programming languages, there were many programming languages made before that decade. I don't know about the hardware neither, but in which programming language it was written? *I didn't find a detailed biography of John Shepherd-Barron (ATM inventor at 70s) Update I found this picture, which is taken from a newspaper back to the year 1972 in Iran. Translated PS : Shows Mr. Rad-lon (if spelled correctly), The manager of Barros (if spelled correctly) International Educational Institute in United Kingdom at the right, and Mr. Jim Sutherland - Expert of Computer Kiosks. In the rest of the text I found on this paper, these kind of ATMs which called "Automated Computer Kiosk" were advertised with this: Mr. Rad-lon (if spelled correctly) puts his card to one specific location of Automated Computer Kiosk and after 10 seconds he withdraws his cash. Two more questions are: 1- How those ATMs were so fast? (withdrawal in 10 seconds in that year) 2- I didn't find any text on Internet which state about "Automated Computer Kiosk", Is it valid or were they being called Computer in that time?

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• Will We See More Partisan Splits from the SEC?

  - by Theresa Hickman

  The SEC's lawsuit against Goldman Sachs has made recent headlines. The fact that the SEC seems to be growing more litigious by making examples out of invididuals and companies is not the topic of my blog. The most interesting thing about this case is that the 5 SEC commissioners did not vote unanimously to bring the lawsuit. The commissioners had a 3-2 partisan split. Ms. Shapiro (a registered independent) voted with the 2 Democrats. Split votes rarely happen by the SEC, especially when they are enforcing actions against firms they regulate. I wonder if we will be seeing more of these partisan split votes when it comes to other decisions, say IFRS adoption? I know both the Democrats and Republicans have stated that they support a unified accounting standard. However, will the Republicans want to push back simply because there is a Democrat in office? (Seems childish to me, but I never understood politics). I think Ms. Shapiro will most definitely want a unanimous consensus related to the IFRS topic. There is already talk that we will be seeing more SEC split votes in the future. For example, there will most likely be a split vote regarding Obama's proposed financial-regulatory overhaul. I don't see why IFRS would be exempt. I really hope it doesn't happen because the last thing we need is more road blocks on our IFRS road trip.

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• Hyper-V Guests suddenly stopped working

  - by Anton Gogolev

  Hi! Here's my configuration: Windows Server 2008 R2 Standard as a host OS, and two guests VMs running the same exact OS. Yesterday, Trial Activation on all OSes has expired and quite naturally all machines shut down. I rearmed the host, but cannot log on to either guest VMs. From what I see, they start up normally (State is listed as Running) but CPU Usage seems to be stuck at 3% and when I connect to it all I see is black textmode screen with cursor blinking. One of my VMs has several snapshots, and when I revert back, it starts up normally. Moreover, "reference VM" (the one I cloned these two VMs from) starts up just normally. How can I troubleshoot this issue?

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• TCP/IP performance tuning under KVM/Qemu

  - by vpetersson

  With more and more companies switching to public cloud services, I'm curious what you guys' thoughts are on TCP/IP tuning in the cloud. Is it worth bothering with? Given that you don't have access to the host-server, you're somewhat limited I presume Let's say for the sake of the argument that you're running three MongoDB-servers in a replica-set on FreeBSD or Linux that all sync over an internal network. I'd also be curious if anyone made any actual performance benchmarks to back up their arguments. I benchmarked the various network drivers available for KVM/Qemu here, but I'm curious what the gurus here suggest to tune further. I started playing around a bit with the tuning-recommendations as suggested over here, but interestingly enough I saw a decrease in performance, rather than an increase, but perhaps I didn't fully understand the tweaks. Update: I did a few more benchmarks and posted the result here. Unfortunately the result wasn't really what I expected.

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• nginx conditional Accept header

  - by manu_v

  Some mobile devices send the following incorrect requests to our servers : GET / HTTP/1.0 Accept: User-Agent : xxx The empty Accept header causes our Ruby on Rails server to throw back a 500 error. In Apache, the following directive allows us to rewrite the header before sending it to the application RoR server in order to cope with the broken devices : RequestHeader edit Accept ^$ "*/*" early We're currently setting up nginx, but achieving the same work-around is proving difficult. We are able to set : proxy_set_header Accept */*; However, this seems to have to be done inconditionally. Whenever trying to do : if ($http_accept !~ ".") { proxy_set_header Accept */*; } It complains with the message : "proxy_set_header" directive is not allowed here So, using nginx, how can we set the HTTP Accept header to */* when it is empty before sending the request to the application server ?

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• Sony Bravia (KDL-32EX402) audio connection fails

  - by Rasmus

  Hey. I'm having trouble connecting my computers audio to the TV (Sony Bravia KDL-32EX402). I'm using a standard AUX cable (some kind of adapter for L/R to go into the headphone plug on the computer). I'm connecting the other end to the back of the TV, it doesn't actually say "AUDIO IN" but it has to be (is also right below the "HDMI 1 AUDIO IN). When changing to "PC-mode" and setting the audio input to "PC" nothing happens. (but the pictures get's transmitted fine by VGA). I have checked that it's not the PC's headphone port, nor the AUX cable. What to do, what to do ?

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• How can I keep gnu screen from becoming unresponsive after losing my SSH connection?

  - by Mikey

  I use a VPN tunnel to connect to my work network and then SSH to connect to my work PC running cygwin. Once logged in I can attach to a screen session and everything works great. Now, after a while, I walk away from my computer and sooner or later, the VPN tunnel times out. The SSH connection on each end eventually times out and then I eventually come back to my computer to do some work. Theoretically, this should be a simple matter of just restarting the VPN, reconnecting via SSH, and then running "screen -r -d". However apparently when the sshd daemon times out on the cygwin PC, it leaves the screen session in some kind of hung state. I can reproduce a similar hung state by clicking the close box on a cygwin bash shell window while it's running a screen session. Is there any way to get the screen session to recover once this has happened, so that I don't lose anything?

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• Using nginx and/or varnish to cache server-generated 301 redirects

  - by rlotun

  I'm implementing a sort of url-shortener service. What happens is that I have some backend app server that takes in a request, does some computation and returns a 301 redirected url back upstream to an nginx frontend: request ---> nginx ----> app_server What I want to be able to do is cache this returned 301 url for the same request (a specific url with a "short code"). Does nginx do this caching automatically? Or should I drop in something like varnish in between nginx and the app_server? I can easily cache this in memcache, but that would require hitting the app_server, which I'm sure can be dispensed with after the first request. Thanks.

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• What are some good courses to take my programming to the next level?

  - by absentx

  I am in search of either some in person, or online training that could take my coding to the next level. I am looking to attack two specific areas: Javascript: While I have been getting by with javascript for three or four years, I still feel like it takes a back seat to my other programming. I use Jquery a lot but would prefer to be proficient in pure JS also. PHP: I feel pretty proficient at PHP but I know there is only room to improve. Here I am interested in something that can teach me the more advanced aspects of the language, improve my code writing and perhaps cover object oriented php in depth also. I have looked into Netcom's training courses before but I can't tell if there advanced webmaster professional would be a good fit or not. Seems kind of like a force fed course but I am interested in it because I am looking for something in the one to two week range that is targeted at what I am looking for. I have zero experience with any type of online courses in terms of programming. It appears lots are available, but I am not sure on the quality.

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• How to know which revision or router I do have?

  - by Rosamunda

  I´m trying to update my D-link Dir-600 router with the dd-wrt firmware. I´ve searched for it at the site and found that: Revision A1, B1 and B2 are supported, while C isn´t. Now my router has this information on the back: P/N IIR600GNA .... C1G H/W Ver: C1 F/W Ver: 3.01 So I guess the H/W Ver is the revision, and it´s C... so it´s a lost cause? Or maybe because it´s not just C but C1 I could do something with it? Thanks!

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• A quick hello to the Western Kentucky .NET User Group

  - by Muljadi Budiman

  A few days back, I got a chance to speak at the Western Kentucky .NET User Group meeting in Murray, Kentucky.  The opportunity came up because the original speaker, Jeff Blankenburg, had another obligation and was thus unable to come to this meeting.  I volunteered to deliver his presentation, which is an overview of MIX10 conference. It was a great experience for me; got to drive around and do a little bit of sight-seeing – can’t say I’ve ever been to Kentucky before, so first trip ever there.  I got to meet the user group’s current lead, Tom Turner and got to chat and discuss about all kinds of stuff with the other members.  Cheers to Matt Gawarecki and Brandon Sharp! The presentation itself mostly covers new features in Visual Studio 2010, which was recently released on April 12 – got to demonstrate Historical Debugging in IntelliTrace, Parallel Stacks, View Call Hierarchy and show some Extensions.  We also covered some of the new functionalities in Silverlight 4 (using webcams, drag & drop support among others) and I got to show off Scott Guthrie’s Windows Phone 7 Twitter app.  Altogether, it was quite a bit to cover in 70 minutes or so, but I think everyone enjoyed it. Jeff provided me with the presentation slides (which I modify a bit) and demo applications; so I’m putting it up here for those that may be interested in downloading them.  Please keep in mind that all the demos were made with VS2010 RC, so there may be slight tweaks to get it to work on the RTM version.

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• Ugly Boot Screen after upgrading to 12.10

  - by Sir Linuxalot

  Is there a way to change the ugly boot screen in 12.10? It seems to have rolled back to that 8-bit blocky looking thing with tiny orange dots underneath. It then breaks into process code under that, and it looks ghastly. I've read some tutorials on getting Plymouth to do some neat things, but they were for older versions of Ubuntu. I'm running a GeForce GTX 460 if that matters. Any help would be appreciated. Update: I've noticed/found a couple of things. The upgrade on my laptop didn't do this. It still uses the "normal" Ubuntu boot logo (using Plymouth, I assume). So, something is off with my desktop. And, I found and installed Super Boot Manager to see if that would help. With that, I enabled Plymouth and added a new theme, but the machine still boots with the block-ugly logo. Finally, I messed around with Grub on boot and added "nomodeset" after "quiet splash" and added it while deleting "quiet splash." None of these solutions worked. I'll keep hunting...

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• Weird problem, special characters after formatting the hard drive, computer not starting 0_o

  - by m3taspl0it

  Hya friends , Last night my computer was working fine. But today when i came back from college and started it , it was starting fine but after sometime it's getting restarted , again and again getting restarted at different points , so i tried to boot it in safe mode but same problem. Now after all this , i finally decided to format the drive C (it is in 80 GB) and load new OS windows XP3. After formatting and loading xp3 sufficient files , when it was getting rebooted for copying the actual os files , it hung and a weird screen came. I've also attached the pic of error : http://www.postimage.org/image.php?v=gxz1vKS My specs : P4 3.0 Ghz 2 GB RAM (2x 512 mb and 1 GB) 3 hard drives { 80 GB (5 years old around) 320 GB ( 2 years old around) 500 GB ( recently bought) 256 MB graphics card any help is very appreciated , thanks

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• Connecting / disconnecting DisplayPort causes crash

  - by iGadget

  I wanted to file a bug about this using ubuntu-bug xserver-xorg-video-intel, but the system prompted my to try posting here first. So here goes :-) While the situation in Ubuntu 11.10 was still somewhat workable (see UI freezes when disconnecting DisplayPort), in 12.04 (using Unity 3D) it has gotten worse. The weird part is that during the 12.04 beta's, the situation was actually improving! I was able to successfully connect and disconnect a DisplayPort monitor without the system breaking down on me. But now with 12.04 final (with all updates), it's just plain terrible. When I now connect an external monitor using the DisplayPort connector on my HP ProBook 6550b, it only works sometimes. Most times (but not always!) the screen just goes blank and the system seems to crash (not even CTRL+ALT+F1 works anymore). Only a hard shutdown by keeping the power button pressed for several seconds and then a restart gets me out of this. I suspect the chances of the system crashing become higher as the system's uptime increases, especially when there have been one or more suspend-resume cycles (although I have also experienced this bug once from a cold boot). Disconnecting is roughly the same as with 11.10 (see issue mentioned above), with the difference that if I resume from suspend, I no longer have to do a CTRL+ALT+F1, ALT+F7 cycle to get my screen back. So what more can I try? Or should I just go ahead and file the bug anyway?

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• Snow Leopard Hangs at Login Window

  - by jessecurry

  I've had an issue for the past few months, but I rarely restart so it hasn't caused too much trouble. Basically, when I start up my Mac (iMac10,1 - 3.06GHz Intel Core 2 Duo, OS X 10.6.3) everything proceeds as usual until I reach the login window. The login window displays normally, but keyboard and mouse input seem to be ignored. This condition persists for around 5 minutes at which time everything goes back to normal. While the login window is frozen my second monitor appears entirely blue, the second monitor receives a background as soon as the login window becomes responsive. If I startup while holding SHIFT the problem still occurs, but the freeze is much shorter. Looking through my logs I see no activity during the time that the login window is frozen. I've attempted to repair disk permissions, and gone through every possible maintenance option in Cocktail.

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• Display Problems running Ubuntu 12.04 in Windows VMware Player

  - by Alex Reynolds

  I am posting this again because I have changed to VMWare Player and I discovered something new. I am running Ubuntu 12.04 LTS (Guest) in VMWare Player 6.0.2 on Windows 7 64-bit Host. I have VMWare Tools installed properly. I am running MATE but the problem persists when I change (to and from) xfce, gnome, mate a-- and back again I had been using this for a couple of years without any graphics issues. After an Ubuntu update (typical) -- my video is corrupt and will not refresh correctly. My desktop icons are "mirrored" and when I open a terminal window (for instance) -- sometimes -- the window appears multiple times. Of course, only one is the real image. It seems to be a refresh problem. When I move an active window around the screen the "older" images "erase" and my icons (for instance) are in the correct location. For instance, I can move the terminal around a pretty corrupted window and the screen behind it is repainted correctly. NEW: Next, I got the idea to try and Remote Desktop in to the Ubuntu 12.04 LTS Guest OS from my Windows 7 64-bit Host. Once working, and connected via Win RDC -- using MATE as default in my /etc/xrdp/startws.sh -- my video is not corrupted and works fine (as in the past). Any ideas about what is going on ? or how to fix this ?

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