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• hp pavilion g6 1250 wireless problems

  - by Ahmed Kotb

  i have tried using ubuntu 10.04 and ubuntu 11.10 and both have the same problem the driver is detected by the additional propriety drivers wizard and after installation , ubuntu can't see except on wireless network which is not mine (and i can't connect to it as it is secured) there are plenty of wireless networks around me but ubuntu can't detect them and if i tried to connect to one of them as if it was hidden connection time out. the command lspci -nvn | grep -i net gives 04:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01) 05:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05) iwconfig gives lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11bgn ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=19 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off i guess it is something related to Broadcom driver .. but i don't know , any help will be appreciated UPDATE: ok i installed a new copy of 11.10 to remove the effect of any trials i have made i followed the link (http://askubuntu.com/q/67806) as suggested all what i have done now is trying the command lsmod | grep brc and it gave me the following brcmsmac 631693 0 brcmutil 17837 1 brcmsmac mac80211 310872 1 brcmsmac cfg80211 199587 2 brcmsmac,mac80211 crc_ccitt 12667 1 brcmsmac then i blacklisted all the other drivers as mentioned in the link the wireless is still disabled.. in the last installation installing the Brodcom STA driver form the additional drivers enabled the menu but as i have said before it wasn't able to connect or even get a list of available networks so what should i do now ? the output of command rfkill list all rfkill list all 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no

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• The power of explicit social networks

  - by me

  Last week I had the pleasure to write a guest post on the Oracle WebCenter blog  with the topic The Power of Social Recommendations where I described Implicit and Explicit Social Recommendations models and how they relate to a Social Engagement Strategy. Now let's look at a real live example. Apple has implemented an explicit Social Network model with So what ? Users do this already on Facebook and Twitter!  (see ZDNet blog post : Ping: Apple should leave social to Facebook, Twitter) BUT there are some major  advantages: "100 % control over the explicit Social Network ->  direct customer relationship without a social intermediary like Facebook or Twitter Total  access to the Social Graph ->  own the Social Graph data from their users and no need to "buy" it from external social network providers Integrated into the core business model ->  harvest all Social Graph data  to provide  highly personalized and trusted recommendations Isn't this the dream of any company which thinks about their social media strategy?  and guess what - Oracle Social Network is all about this - building explicit Social Networks with seamless integration into  your core business processes and applications follow me on twitter:  http://twitter.com/peterreiser Enterprise2.0, enterprise2.0, social networks, social media, apple

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• Troubleshooting Oracle Java 7 with Firefox

  - by Sampo Smolander

  I run Ubuntu 13.04 with up-to-date Firefox and Oracle Java 7 is installed from the package oracle-java7-installer from the ppa:webupd8team/java PPA. Java doesn't work in Firefox. When I start firefox from the command line, and open a webpage with some java, the java applet doesn't work and in the terminal firefox prints: $ firefox (process:28565): GLib-CRITICAL **: g_slice_set_config: assertion `sys_page_size == 0' failed java.io.IOException: Cannot run program "/usr/lib/jvm/java-7-oracle/jre/bin/java": error=13, Permission denied at java.lang.ProcessBuilder.start(ProcessBuilder.java:1041) at sun.plugin2.jvm.JVMLauncher.start(Unknown Source) at sun.plugin2.main.server.JVMInstance.startImpl(Unknown Source) (and some 20-30 lines more) (I guess the GLib-line can be ignored here.) Also, when I close the tab that contained the java applet, firefox freezes and I have to kill it. However, the permissions look fine: $ ls -l /usr/lib/jvm/java-7-oracle/jre/bin/java -rwxr-xr-x 1 root root 5746 Jul 22 17:35 /usr/lib/jvm/java-7-oracle/jre/bin/java So, what could be wrong here? What to check next? EDIT: Oracle Java is needed for stupid Danske Bank online banking. (You are of course welcome to suggest me to change my bank.)

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• Ubuntu 12.04 NVIDIA GeForce Go 7600 black screen during boot

  - by Florian Schmidt

  I'm using Ubuntu as the only operating system since two years. In the first Ubuntu versions I had seen my BIOS screen and the boot screens. Actually im using Ubuntu 12.04 and my screen stays black until Ubuntu is started (both screens are missing). I guess this situation appeared the first time in Ubuntu 11 (not sure). I searched via google and tried the popular activities but was not able to fix my issue. I opened the laptop and checked all connections. I'm using boot option nomodeset. I had a look through many many web pages. I don't know how to continue and hope somebody could be helpful. My hardware: Acer Aspire 9300 AMD Turion 64 x2 NVIDIA GeForce Go 7600 (using proposed driver) lspci | grep NVIDIA 00:00.0 RAM memory: NVIDIA Corporation C51 Host Bridge (rev a2) 00:00.1 RAM memory: NVIDIA Corporation C51 Memory Controller 0 (rev a2) 00:00.2 RAM memory: NVIDIA Corporation C51 Memory Controller 1 (rev a2) 00:00.3 RAM memory: NVIDIA Corporation C51 Memory Controller 5 (rev a2) 00:00.4 RAM memory: NVIDIA Corporation C51 Memory Controller 4 (rev a2) 00:00.5 RAM memory: NVIDIA Corporation C51 Host Bridge (rev a2) 00:00.6 RAM memory: NVIDIA Corporation C51 Memory Controller 3 (rev a2) 00:00.7 RAM memory: NVIDIA Corporation C51 Memory Controller 2 (rev a2) 00:02.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1) 00:03.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1) 00:04.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1) 00:09.0 RAM memory: NVIDIA Corporation MCP51 Host Bridge (rev a2) 00:0a.0 ISA bridge: NVIDIA Corporation MCP51 LPC Bridge (rev a3) 00:0a.1 SMBus: NVIDIA Corporation MCP51 SMBus (rev a3) 00:0a.3 Co-processor: NVIDIA Corporation MCP51 PMU (rev a3) 00:0b.0 USB controller: NVIDIA Corporation MCP51 USB Controller (rev a3) 00:0b.1 USB controller: NVIDIA Corporation MCP51 USB Controller (rev a3) 00:0d.0 IDE interface: NVIDIA Corporation MCP51 IDE (rev f1) 00:0e.0 IDE interface: NVIDIA Corporation MCP51 Serial ATA Controller (rev f1) 00:10.0 PCI bridge: NVIDIA Corporation MCP51 PCI Bridge (rev a2) 00:10.1 Audio device: NVIDIA Corporation MCP51 High Definition Audio (rev a2) 00:14.0 Bridge: NVIDIA Corporation MCP51 Ethernet Controller (rev a3) 03:00.0 VGA compatible controller: NVIDIA Corporation G73 [GeForce Go 7600] (rev a1) So my question is what to do to fix the black screen during boot?

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• Where can I find video resources of people programming?

  - by Corey

  This might be a strange question. I'm looking for videos of people actively coding something while explaining it. However, I don't want is a beginner video that delves into what variables and objects are. Nick Gravelyn's tile engine tutorial is a great example of what I'm looking for. (He actually used to host the full, unbroken video files in his site's archive, but I guess he took them down...) I tend to learn best by "action" examples; it's difficult for me to learn by reading through documentation and text tutorials, but if I see somebody actively doing a task, I can immediately register it and apply it myself. I'm hard-of-hearing, so I would really prefer that if the video has a lot of talking, it have captioning or subtitling of some sort, or at the very least, a transcript. The tile engine videos did not have captions, but the code he was writing was very self-documenting, so I understood it for the most part. I've gone through most of the relevant GoogleDevelopers and GoogleTechTalks videos on Youtube, so those need not apply. Are there any resources out there, or even websites dedicated to this kind of thing?

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• How can I author objects with perspective that fit into a tile-based map but span multiple tiles?

  - by Growler

  I'm creating a tilemap city and trying to figure out the most efficient way to create unique building scenes. The trick is, I need to maintain a sort of 2D, almost-top-down perspective, which is hard to do with buildings or large objects that span multiple tiles. I've tried doing three buildings at a time, and mixing and matching the base layer and colors, like this: This creates a weird overlapping effect, and also doesn't seem that efficient from a production standpoint. But it was the best way to have shadows appear correctly on the neighboring buildings. I'm wondering if modular buildings would be the way to go? That way I can mix and match any set of buildings together as tiles: I guess I would have to risk some perspective and shadowing to get the buildings to align correctly. What sort of authoring process could I use to allow me to create a variety of buildings (or other objects) that maintain this perspective while spanning multiple tiles worth of screen space? Would you recommend creating blank buildings, and then affixing art overlays as necessary to make the buildings unique? Or should they be directly part of the building tile (for example, create a separate tileset of buildings signs and colorings)?

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• Thoughts on web development architecture through integrating C++ in the future to a web application

  - by Holland

  I'm looking to build a website (it's actually going to be a commercial startup) I saw this question and it really shed some light on a few things that I was hoping to understand (kudos to the op). After seeing that, it would make sense that, unless the website were required to actually have millions of hits per day, it wouldn't be a viable solution to write a C++ backend on the server side. But this got me thinking. what if it in the (unlikely) events of the future, it does go that route? The problem is that, while I'm thinking of starting this all using .Net (in the beginning) just to get something quick and easy up without a lot of hassle (in terms of learning), and then moving towards something more Open Source (such as Python/Django or RoR) later to save money and to support OSS, I'm wondering IFF the website actually becomes big, will it be a good idea to integrate a C++ backend, and use Python ontop of C++ for a strong foundation, and then mitigate HTML/CSS/AJAX/etc ontop of the backend's foundation? I guess, what I'd like to know is that, given the circumstance, if this were to happen, would it be a proper approach in terms of architecture? I'd definitely be supporting MVC as that seems to be a great way to implement a website. All in all, would one consider this rational, or are there other alternatives? I like .Net, and I'd like to use it in the beginning, because I have much more experience with that than, say, Python or PHP, and I prefer it in general, but I really do want to support OSS in the future. I suppose the sentence I'm looking for is, "is this pragmatic?"

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• API Wordpress & Inksoft

  - by user105405

  I am new to this whole website design and API bit. My husband has bought a license for the program InkSoft. Their site does not offer very much customization, so we decided to buy a Wordpress.org site that is hosted through godaddy. With all of that said, I am trying to figure out a way to take the products that are on InkSoft's website, which get their information from the suppliers' warehouses (for things like inventory), and put them on the Wordpress site. There is an area on InkSoft where I can access "Store API...API feeds." I guess I am just confused on where to put this type of stuff in the WordPress site or how to put it in there? If I go to the "Products" area on this Store API, I am given a URL that deals with the product stuff and I am also given a HUGE list of stuff that contains stuff such as: < ProductCategoryList < vw_product_categories product_category_id="1000076" name="Most Popular" path="Most Popular" thumburl_front="REPLACE_DOMAIN_WITH/images/publishers/2433/ProductCategories/Most_Popular/80.gif" / Can everyone give me directions on what and how to use all this stuff? Thank you!!

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• FileOpenPicker/FileSavePicker doesn't allow *.* wildcard file associations

  - by mbrit

  On Twitter, Matthias Jauernig commented that the FileOpenPicker and FileSavePicker doesn't allow *.* wildcard file associations. I was relaxed about this and wrote back that it was related to sandboxing implying it was a "good thing", however as Matthias commented back, perhaps it's not.In Metro-style the sandboxing works that if something gives you a file (e.g. the picker, or a share operation), you can access it regardless of where on the system. If you find the file yourself, you have to declare the type.The reason why I think it's related to sandboxing is because if you work with files programmatically you have to be explicit about the file types. This is to stop malware that you think is only interested in - say .PDF files, scanning and uploading any .EML files that it can find on the machine. It follows then on the pickers that restriction would continue. It allow's the retail store team to validate that an app is likely to behave itself. If it's an app that works with images, locking down the picker so that it can only access image file types makes sense.However Matthias mentioned that he has an app that should allow files of any arbitrary file. That fits more into the "if the user selects it, it must be OK" camp than the "programmatic scanning" camp. So now I'm left wondering why the picker doesn't allow any type to be selected.I think then maybe the decision comes down to simplicity. A lot of the decisions in Metro-style design relate to ideas about "zero intimidation". Allow the user to select any file is too much like Old Windows, and not enough like Reimagined Windows. What happens in Matthias's app if the user selects Explorer.exe as the file he or she wants to work with? I guess it's fine if you expect your user to know what they're doing (Old Windows), but not so fine if you're expecting a three year old to work with it (Reimagined Windows).

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• How to create a Semantic Network like wordnet based on Wikipedia?

  - by Forbidden Overseer

  I am an undergraduate student and I have to create a Semantic Network based on Wikipedia. This Semantic Network would be similar to Wordnet(except for it is based on Wikipedia and is concerned with "streams of text/topics" rather than simple words etc.) and I am thinking of using the Wikipedia XML dumps for the purpose. I guess I need to learn parsing an XML and "some other things" related to NLP and probably Machine Learning, but I am no way sure about anything involved herein after the XML parsing. Is the starting step: XML dump parsing into text a good idea/step? Any alternatives? What would be the steps involved after parsing XML into text to create a functional Semantic Network? What are the things/concepts I should learn in order to do them? I am not directly asking for book recommendations, but if you have read a book/article that teaches any thing related/helpful, please mention them. This may include a refernce to already existing implementations regarding the subject. Please correct me if I was wrong somewhere. Thanks!

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• Should I swap from WCF to NserviceBus

  - by Matt Roberts

  We have a central server that sends and recieves messages from a number of PCs that are located on client networks in various locations. To facilitate this, currently I'm using WCF with TCPNetBindings, using duplex communication secured with certificates. Now, we have a number of issues with this - mainly that we are being asked to support "disconnected mode" (we need to be fault tolerant). From what I know, there is no simple way to do this using the WCF stack - we'd need to implement something and perhaps use msmq. I've been looking at NServiceBus lately, and from I can see it seems to fit the bill well - fault tolerance, messages can be sent over the internet via a simple http gateway, etc. I know it's well respected in the community, and I can see why from looking into it. So, my question is...Does employing NServiceBus sound like a sensible idea, or does anyone have any other suggestions / real world experience that relate to this? I guess I'm worried of introducing a new tech that I know relatively little about, and facing problems with things like securing it, setting everything up in a reliable way, gotchas along the way.. I'm also wary of "gold-plating" the architecture, and choosing something shiny that will end up bogging me down in implementation versus sticking with WCF and just making it work for me.. Thanks!

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• IOS OpenGl transparency performance issue

  - by user346443

  I have built a game in Unity that uses OpenGL ES 1.1 for IOS. I have a nice constant frame rate of 30 until i place a semi transparent texture over the top on my entire scene. I expect the drop in frames is due to the blending overhead with sorting the frame buffer. On 4s and 3gs the frames stay at 30 but on the iPhone 4 the frame rate drops to 15-20. Probably due to the extra pixels in the retina compared to the 3gs and smaller cpu/gpu compared to the 4s. I would like to know if there is anything i can do to try and increase the frame rate when a transparent texture is rendered on top of the entire scene. Please not the the transparent texture overlay is a core part of the game and i can't disable anything else in the scene to speed things up. If its guaranteed to make a difference I guess I can switch to OpenGl ES 2.0 and write the shaders but i would prefer not to as i need to target older devices. I should add that the depth buffer is disabled and I'm blending using SrcAlpha One. Any advice would be highly appreciated. Cheers

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• Computer Science Programming Certificate vs. Computer Science Degree?

  - by Jess

  I'm kind of in a tough spot. My current living conditions require that I work a full-time job while attending school. I've attended a UC in the past but had to withdraw my junior year due to financial issues at home. I currently work an entry-level IT corp job but I'm looking to further my salary/skills by getting a degree, or a programming certificate like this one: http://www.lavc.edu/voced1/CSITCertCSP/CSITCertFrameCSP.htm Herein lies the problem. I prefer getting a CS degree from an accredited university but I looked at the schedules for classes and it is impossible to work around my current 40/hr work week. There are random morning classes, with the occasional evening class, but the times get even more construed as I move my way up to the upper divisions. So what I guess I'm trying to get at is, can anyone lay out the pros and cons of obtaining a certificate vs. the degree (besides obvious points like the latter being 100x better)? I'm aware that having a degree is always going to be a better route, but...is the programming certificate useless? Should I not even bother?

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• Restoring GRUB2 on Software RAID 0 after Windows 7 wiped it using Ubuntu 10.10 LiveCD

  - by unknownthreat

  I have installed Ubuntu 10.10 on my system. However, I need to install Windows 7 back, and I expect that it would alter GRUB and it did. Right now, my partition on my Software RAID 0 looks like this: nvidia_acajefec1 is Ubuntu 10.10 and nvidia_acajefec3 is Windows 7. I've been following some guides around and I am always stuck at GRUB not able to detect the usual RAID content. I've tried running: sudo grub > root (hd0,0) GRUB complains it couldn't find my hard disk. So I tried: find (hd0,0) And it complains that it couldn't find anything. So I tried: find /boot/grub/stage1 It said "file not found". Here's the text from the console: ubuntu@ubuntu:~$ grub Probing devices to guess BIOS drives. This may take a long time. [ Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename. ] grub> root (hd0,0) root (hd0,0) Error 21: Selected disk does not exist grub> find /boot/grub/stage1 find /boot/grub/stage1 Error 15: File not found Fortunately, I got one person suggesting that what I've been trying to do is for GRUB Legacy, not GRUB2. So I went to the suggested website, ** (http://grub.enbug.org/Grub2LiveCdInstallGuide) **try to look around, and try: ubuntu@ubuntu:~$ sudo fdisk -l Unable to seek on /dev/sda This is just the step 2 of the instruction in the http://grub.enbug.org/Grub2LiveCdInstallGuide and I cannot proceed because it cannot seek /dev/sda. However, ubuntu@ubuntu:~$ sudo dmraid -r /dev/sdb: nvidia, "nvidia_acajefec", stripe, ok, 488397166 sectors, data@ 0 /dev/sda: nvidia, "nvidia_acajefec", stripe, ok, 488397166 sectors, data@ 0 So what now? Do you have an idea for how to make fdisk see my RAID array on live cd (Ubuntu 10.10)? Honestly, I am lost, very lost in trying to restore GRUB2 on this software RAID 0 system right now.

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• Suggestions for implementing a dynamic 2D level

  - by Wouter

  I am working on a game that needs a level that is completely generated. Currently my approach is to draw textures for the levels pixel by pixel during the game (in XNA with SpriteBatch). This is too intensive unfortunately. The game has frame drops even when I only draw 1 level texture each draw cycle. Here is an example of the current prototype. It is a simple sidescroller with the avatar swimming through a cave. The shape of this cave will alter throughout the level (textures and physics collision shapes). You can clearly see the boundaries of the level tiles in the screenshot below. These are generated just before they move into camera view. For inspiration I looked at PixelJunk Shooter 2. These levels are obviously not generated, but some of the levels have movement. How do you guys think they implemented it? My guess is that the level and other objects in the game are actually flat 3d models, but I am not sure..

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• When using method chaining, do I reuse the object or create one?

  - by MainMa

  When using method chaining like: var car = new Car().OfBrand(Brand.Ford).OfModel(12345).PaintedIn(Color.Silver).Create(); there may be two approaches: Reuse the same object, like this: public Car PaintedIn(Color color) { this.Color = color; return this; } Create a new object of type Car at every step, like this: public Car PaintedIn(Color color) { var car = new Car(this); // Clone the current object. car.Color = color; // Assign the values to the clone, not the original object. return car; } Is the first one wrong or it's rather a personal choice of the developer? I believe that he first approach may quickly cause the intuitive/misleading code. Example: // Create a car with neither color, nor model. var mercedes = new Car().OfBrand(Brand.MercedesBenz).PaintedIn(NeutralColor); // Create several cars based on the neutral car. var yellowCar = mercedes.PaintedIn(Color.Yellow).Create(); var specificModel = mercedes.OfModel(99).Create(); // Would `specificModel` car be yellow or of neutral color? How would you guess that if // `yellowCar` were in a separate method called somewhere else in code? Any thoughts?

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• Annotate source code with diagrams as comments

  - by Steven Lu

  I write a lot of (primarily c++ and javascript) code that touches upon computational geometry and graphics and those kinds of topics, so I have found that visual diagrams have been an indispensable part of the process of solving problems. I have determined just now that "oh, wouldn't it just be fantastic if I could somehow attach a hand-drawn diagram to a piece of code as a comment", and this would allow me to come back to something I worked on, days, weeks, months earlier and far more quickly re-grok my algorithms. As a visual learner, I feel like this has the potential to improve my productivity with almost every type of programming because simple diagrams can help with understanding and reasoning about any type of non-trivial data structure. Graphs for example. During graph theory class at university I had only ever been able to truly comprehend the graph relationships that I could actually draw diagrammatical representations of. So... No IDE to my knowledge lets you save a picture as a comment to code. My thinking was that I or someone else could come up with some reasonably easy-to-use tool that can convert an image into a base64 binary string which I can then insert into my code. If the conversion/insertion process can be streamlined enough it would allow a far better connection between the diagram and the actual code, so I no longer need to chronographically search through my notebooks. Even more awesome: plugins for the IDEs to automatically parse out and display the image. There is absolutely nothing difficult about this from a theoretical point of view. My guess is that it would take some extra time for me to actually figure out how to extend my favorite IDEs and maintain these plugins, so I'd be totally happy with a sort of code post-processor which would do the same parsing out and rendering of the images and show them side by side with the code, inside of a browser or something. Since I'm a javascript programmer by trade. What do people think? Would anyone pay for this? I would.

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• lucid 10.04 LTS => Precise 12.04.1 : upgrade doesn't work

  - by Rastom

  I googled and looked into all unkown issues on ubuntu forums but I can't figure out why a 10.04 LTS server won't detect the last LTS 12.04.1. I guess since 12.04 is a fresh dist, not much is reported for related issues Here is what I did : apt-get update apt-get upgrade apt-get install update-manager-core it was already installed so no update for this package. I checked : /etc/update-manager/release-upgrades [DEFAULT] # Default prompting behavior, valid options: # # never - Never check for a new release. # normal - Check to see if a new release is available. If more than one new # release is found, the release upgrader will attempt to upgrade to # the release that immediately succeeds the currently-running # release. # lts - Check to see if a new LTS release is available. The upgrader # will attempt to upgrade to the first LTS release available after # the currently-running one. Note that this option should not be # used if the currently-running release is not itself an LTS # release, since in that case the upgrader won't be able to # determine if a newer release is available. Prompt=lts I also checked my sourcelist before running apt-get : /etc/apt/sources.list deb http://archive.ubuntu.com/ubuntu/ lucid main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ lucid-security main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse deb http://security.ubuntu.com/ubuntu lucid-security main restricted deb-src http://security.ubuntu.com/ubuntu lucid-security main restricted deb http://security.ubuntu.com/ubuntu lucid-security universe deb-src http://security.ubuntu.com/ubuntu lucid-security universe deb http://security.ubuntu.com/ubuntu lucid-security multiverse deb-src http://security.ubuntu.com/ubuntu lucid-security multiverse # deb http://landscape.canonical.com/packages/hardy ./ # deb-src http://landscape.canonical.com/packages/hardy ./ and then following Ubuntu guide for Precise upgrade the command below should work : root@xxxxxxxxx:/etc/apt# do-release-upgrade -d Checking for a new ubuntu release No new release found So am I missing something ? The server was accessing outside through a proxy but I grant direct access to this server to avoid any Internet access problem or redirection but no clue... Any help would be appreciated

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• Unexpected SQL Server 2008 Performance Tip: Avoid local variables in WHERE clause

  - by Jim Duffy

  Sometimes an application needs to have every last drop of performance it can get, others not so much. We’re in the process of converting some legacy Visual FoxPro data into SQL Server 2008 for an application and ran into a situation that required some performance tweaking. I figured the Making Microsoft SQL Server 2008 Fly session that Yavor Angelov (SQL Server Program Manager – Query Processing) presented at PDC 2009 last November would be a good place to start. I was right. One tip among the list of incredibly useful tips Yavor presented was “local variables are bad news for the Query Optimizer and they cause the Query Optimizer to guess”. What that means is you should be avoiding code like this in your stored procs even though it seems such an intuitively good idea. DECLARE @StartDate datetime SET @StartDate = '20091125' SELECT * FROM Orders WHERE OrderDate = @StartDate Instead you should be referencing the value directly in the WHERE clause so the Query Optimizer can create a better execution plan. SELECT * FROM Orders WHERE OrderDate = '20091125' My first thought about this one was we reference variables in the form of passed in parameters in WHERE clauses in many of our stored procs. Not to worry though because parameters ARE available to the Query Optimizer as it compiles the execution plan. I highly recommend checking out Yavor’s session for additional tips to help you squeeze every last drop of performance out of your queries. Have a day. :-|

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• Lexmark X5650 doesn't print (scanning works)

  - by unor

  I want to use a Lexmark X5650 under Ubuntu. When I connect it via USB, Ubuntu recognizes the device, but can't find a driver. On the Lexmark support site, you can select "Unix/Linux" and then "Ubuntu 9.04", "9.10", "10.04" and "10.10". However, all versions lead to the same driver: lexmark-08z-series-driver-1.0-1.i386.deb.sh.tar.gz (Last updated: 2012-04-13). While installing this driver, the installer asks me to connect the device. As soon as I connect it via USB, Ubuntu now adds the printer automatically. So after the installation completed, I had 2 printers set up. But I can't print anything (I tried it with both printer configurations). Scanning works fine, though. So I guess the driver installation and the device connection are successful. When I try to print something, the print job is listed in the printing queue, but nothing happens. After some time, I get an error message which starts a debug wizard, but in the end it reads something like "Sorry, couldn't find the reason". I had several different error messages (unfortunately, I didn't record them), one was approximately like "printer cannot communicate with computer". Another said that my color ink was low (which is true, but black is full). Another said there was an input/output error. I tried it with Ubuntu 11.10. Because I read that some people had success with 10.04., I installed it in QEMU and installed the driver there, too. Same problem, though. I'd like to upgrade to 12.04, if it should work there for any reason, but I read that for some people this printer stopped working in 12.04 :/ So, it would be best if the printer would work in 12.04. If that's not possible, I'd be fine with starting a QEMU virtual machine with any GNU/Linux distribution that works with my printer.

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• Best way to convert existing project to be open source in GitHub

  - by Tom

  I've been working on a personal closed source project for some time and would like to make it open source. I've never created my own open source project before so it will be a good learning experience. I have been using GitHub as source control, so once I've written some decent docs on how to use and develop for it etc, it should be as simple as switching the repo to be public right? I guess my main question is around licencing. I was thinking of going with Apache 2.0 licence just because it seems to be widely used. It requires the licence header to be attached to all the source files, but if I do that now then all the other commits in the past will have it missing. Does that mean some one could pull an earlier version and it wouldn't have a licence? Is it best to start a new repo with the initial commit containing all the code with licence headers? Or maybe is there some advanced Git functionality that allows me to apply the licence header to all existing commits some how? Cheers.

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• Ubuntu on Android for Samsung Galaxy note 2?

  - by schulzey

  This question is lengthy, I have to warn you. I'm generally a mac user. My setup currently consists of using mac osx and vmware (windows 7) to run one program that isn't compatible with osx or linux. This program can be run using crossover (wine) as well but it works better with vmware. I'm thinking of switching over to ubuntu as my main operating system on my computers and running vmware or crossover that way to access the program I need. No specific reason why, I guess I'm just sick of the apple/windows machine. I've always wanted to try linux so figure there is no better time than now. The point is I haven't used ubuntu yet so I don't know a lot about it. I was planning on buying the iphone 5 when I saw there is an app to setup ubuntu operating system on an android phone. I'm now thinking that this would be fantastic for me if I bought the samsung galaxy note 2 and was able to install ubuntu and either vmware or crossover to use my windows specific program for work right on my phone. The samsung galaxy note 2 has a 1.4 ghz processor and 2gb of ram which is enough to handle a modern operating system. My program does not need a lot of speed or memory to work. To be honest, the windows specific program I need would work fine on an old laptop running windows xp. My first question is if ubuntu for android is really the full operating system that lets you run programs just like a desktop pc? Is it super slow where it takes many minutes to load up ubuntu? I don't need blazing speeds, but I'd like something useable. My next question has to do with vmware or crossover. Is ubuntu for android capable of running these programs? I think it would be great to use the same operating system like ubuntu on my desktop, laptop, tablets, and phone. Thanks so much for all the help!!!

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• Apache htaccess results in files being downloaded instead of displayed

  - by chrissik

  So I had this "beautiful" website that did exactly what I wanted it to do. Then I shut down my PC, reboot and...the pages just download now instead of being displayed. I re-installed XAMPP and launched Apache again and I was able to identify the .htaccess file as the cause of the problem. Options +FollowSymlinks RewriteEngine on RewriteCond %{QUERY_STRING} !^desktop RewriteCond %{HTTP_USER_AGENT} "android|blackberry|googlebot-mobile|iemobile|iphone|ipod|#opera mobile|palmos|webos" [NC] RewriteRule ^/?$ /mobile/index [L,R=302] RewriteRule ^/?$ /de/index [R] RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME}\.html -f RewriteRule ^(.*)$ $1.html Here is the problem I guess: RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME}\.html -f RewriteRule ^(.*)$ $1.html This should make it possible to use /de/index instead of /de/index.html - but somehow it causes the page to download if I open localhost/de/index (but with localhost/de/index.html it works fine...). I'm using HTML Sites with SSI Elements on a Apache web server. The only other file that is different to the out-of-the-box ones is the httpd.conf, where I enabled SSI: AddType text/html .shtml AddHandler server-parsed .shtml AddHandler server-parsed .html AddHandler server-parsed .htm Options Indexes FollowSymLinks Includes AddOutputFilter INCLUDES .shtml Options +Includes So I hope there is somebody among you that can help me with this annoying problem as I'm quite desperate... for some reason, even without the problematic lines Chrome keeps downloading the files (even if I delete the .htaccess file), while IE and Opera display the pages. Edit: Now Opera also wants to download files (whether index.html or index are called).

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• Screen lock broken when using separate x screens

  - by Wolf

  For some reason, the screen lock appears to be broken when I use separate x screens (it works fine if I use twin view or just one monitor, though). If I wait for the screen to lock (or if I tell it to lock), it fades to black, showing only the mouse cursor. However, when I move the mouse to bring up the password prompt, nothing happens, the screens remain completely blank. Furthermore, it would appear that the screen lock never activated in the first place, for two reasons: one, if I blindly enter my password and press enter, nothing happens; and two, if I press ctrl+alt+delete and then enter it logs me out (which shouldn't happen if the password prompt is there, right), losing any progress I have on any of the open programs (meaning, not a very friendly option for a programmer ;) ). So yeah, does anyone know why this is happening, and how to fix it? Thanks! Notes: I am using Ubuntu 11.10 64 bit. I am using gnome-classic, but the same problem occurs when I use unity. I do not have xscreensaver, nor do I have any screen savers running (except, I guess for the default blank one).

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• Explaining the difference between OData & RDF by way of analogy

  - by jamiet

  A couple of months back I wrote a blog post entitled Microsoft, OData and RDF where I gave a high level view of the OData protocol and how it compares to RDF. I talked about linked data, triples and such like which may have been somewhat useful however jargon-heavy. Earlier today Dr Michael Hausenblas (blog | twitter) offered an analogy which I think is probably more useful and with Michael's permission I'm re-posting it here:Imagine a Web (a Web of Documents, if you wish), which is not based on HTML and hyperlinks, but on MS Word documents. The documents are all available on the Internet, so you can download them and consume the content. But after you’re done with a certain document that talks about a book, how do you learn more about it? For example, reviews about the book or where you can purchase it? Maybe the original document mentions that there is some more related information on another server. So you’d need to go there and look for the related bit of information yourself. You see? That’s what the Web is great at – you just click on a hyperlink and it takes you to the document (or section) you’re interested in. All the legwork is taken care of for you through HTML, URIs and HTTP.Hm, right, but how is this related to OData? Well, OData feels a bit like the above mentioned scenario, just concerning data. Of course you – well actually rather a software program I guess – can consume it (a single source), but that’s it.from Oh – it is data on the Web by Michael Hausenblas I believe that OData has loads of use cases but its important to understand its limitations as well and I think Michael has done a good job of explaining those limitations.@Jamiet   Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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