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• Wireless issues BCM4311

  - by user207757

  I have been working with a nice Gent but I am getting stuck. I am just getting back in to Linux and Ubuntu was recommended. I like the look so far but the wireless isn't working I run the update and when it says complete it hangs at the end. Please let me know what to do at this point. "wl: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/3.11.0-12-generic/updates/dkms/ depmod.... DKMS: install completed." Hangs here!! Thanks for all your help, D.C.

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• Checking For Empty Enumerations

  While spelunking in some code recently I saw a method that looked something like this: public void Foo<T>(IEnumerable<T> items) { if(items == null || items.Count() == 0) { // Warn about emptiness } } This method accepts a generic enumeration and then proceeds to check if the enumeration is null or empty. Do you see the potential problem with this code? Ill give you a hint, its this line: items.Count() == 0 Whats the problem? Well that line right there has the potential...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How can I designed multi-threaded application for larger user base

  - by rokonoid

  Here's my scenario, I need to develop a scalable application. My user base may be over 100K, every user has 10 or more small tasks. Tasks check every minute with a third party application through web services, retrieving data which is written in the database, then the data is forwarded to it's original destination. So here's the processing of a small task: while(true){ Boolean isNewInformationAvailable = checkWhetherInformationIsAvailableOrNot(); If(isNewInformationAvailable ==true){ fetchTheData(); writeToDatabase(); findTheDestination(); deliverTheData(); isAvailable =false; } } Here is the question: as the application is large, how should I approach designing this. I'm going to use Java to write it. Should I use concurrency, and how would you manage the concurrency?

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• Error after installing Lubuntu 14.04 through liveUSB

  - by Veritas

  A friend asked me to install ubuntu on his toshiba NB 200 netbook to replace windows xp. I formatted the flash drive, ran an nb5sum check on the iso and after running netbootin , I checked the drive for errors. No problems so far. During the installation, while everything seemed normal, the installation regularly paused until I pressed a button or moved the mouse. After restarting, it doesn't boot and it starts a shell showing : "General error mounting filesystems A maintenance shell will now be started CONTROL-D will terminate this shell and reboot the system " Any ideas? Any help is appreciated!

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• Partial Function Application

  - by AngelEyes

  This is long overdo... Just a short and simple example of Partial Function Application.   For some good explanations, which also include the difference between Currying and Partial Function Application, check out: http://msmvps.com/blogs/jon_skeet/archive/2012/01/30/currying-vs-partial-function-application.aspx and also this answer on stackoverflow: http://stackoverflow.com/a/8826698/532517   And here is the example, taken from real code:           internal void Addfile(string parentDirName, string fileName, long size)         {             AddElement(parentDirName, fileName, (name, parent) => new File(name, size, parent));         }           public void AddDir(string parentDirName, string dirName)         {             AddElement(parentDirName, dirName, (name, parent) => new Directory(dirName, parent));         }           private void AddElement(string parentDirName, string name,                                 Func<string, FileSystemElement, FileSystemElement> elementCreator)         {             ValidateFileNames(parentDirName, name);             var parent = (Directory)_index[parentDirName];             FileSystemElement element = elementCreator(name, parent);             parent._elements.Add(element);             _index.Add(name, element);         }

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• UBUNTU 11.10 will not boot after succesfully installed on 8GB usb 3.0 pendrive

  - by Oldrifle

  UBUNTU 11.10 on 8GB USB 3.0 pendrive. Drive Partitioned using gparted. 4GB BASE 3GB Home 600MB swap Installation Ok. Restart blinking cursor. Installed another distro on another USB 3.0 stick. It boots OK. --------------- DEBUG -------------------------------------- Boot Other distro and check: I compare boot file with another linux. grub of ubuntu is 1.4mb contend is different. Taken photo with mobile camera but can not add here. Files has note(music) sign on it. Downloaded 11.10 desktop and Installed. Same result. Will download 12.x when ready and try. Ready to try any suggestion.

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• Do I lose/gain performance for discarding pixels even if I don't use depth testing?

  - by Gajoo

  When I first searched for discard instruction, I've found experts saying using discard will result in performance drain. They said discarding pixels will break GPU's ability to use zBuffer properly because GPU have to first run Fragment shader for both objects to check if the one nearer to camera is discarded or not. For a 2D game I'm currently working on, I've disabled both depth-test and depth-write. I'm drawing all objects sorted by their depth and that's all, no need for GPU to do fancy things. now I'm wondering is it still bad if I discard pixels in my fragment shader?

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• Fatal Error when booting

  - by Denja

  I'm running Ubuntu 10.10 with ATI proprietary FGLRX graphic drivers When I boot, I can see this very quick message appearing; I don't have time to read it: **Fatal Error ..................................**(&@something i cant read) I searched through the log file in /var/log/ in order to find what is wrong and I did find something in the /var/log/Xorg.1.log: 21:31:08 [ 15.734] (--) using VT number 1 [ 204.647] Fatal server error: [ 204.647] xf86OpenConsole: VT_WAITACTIVE failed: Interrupted system call [ 204.647] [ 204.647] Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 204.647] Please also check the log file at "/var/log/Xorg.1.log" for additional information. [ 204.647] But this is already Xorg.1.log. And there is a Xorg.0.log also & Xorg.0.log.old but it doesnt have any error in it. My system seems to work properly and it seems its not affected by this But how do I correct this message? Any suggestions?

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• Rebuilding system databases in 2008 R2

  - by TiborKaraszi

  All my attempts so far to rebuild the system databases in 2008 R2 has failed. I first tried to run setup from below path: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Release But above turns out to be the 2008 setup program, not 2008R2 setup; even though I have no 2008 instanced installed (I have only R2 instances installed). Apparently, the 2008 setup program does a version check of the instance to be rebuilt and since it is > 10.50.0, the rebuild fails. Books Online for R2 the section...(read more)

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• Effective methods for managing work tasks? (documenting/remembering/prioritizing)

  - by Kaleb Brasee

  I'm looking for suggestions on effective methods that I can use to document, remember and prioritize tasks at work. Many of the these tasks belong to a primary project, but they also exist for independent initiatives. The tasks themselves cover everything from development to documentation to discussions, with varying priorities, and deadlines ranging from right away to a few months from now. Historically I have used a notepad to keep track of these tasks, with a star next to an item indicating it needs to be done and a check mark when it's completed. However, as I gain more responsibilities and more things to manage: it becomes harder to make sure I've done everything (because some things get lost 5 pages back) it becomes harder to remember what's most important to do next it becomes harder to keep track of dependencies between tasks Has anyone found methods that have made their tasks easier to manage? I've considered adding some meta-data to keep track of what's most important and dependencies, or possibly switching to an app that could automate this (if such a thing exists). Something that's accessible anywhere would definitely be a plus.

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• New code release today - 2011.1.4.2

  - by Steve Tunstall

  Wow, two blog entries in the same day! When I wrote the large 'Quota' blog entry below, I did not realize there would be a micro-code update going out the same evening. So here it is. Code 2011.1.4.2 has just been released. You can get the readme file for it here: https://wikis.oracle.com/display/FishWorks/ak-2011.04.24.4.2+Release+Notes Download it, of course, through the MOS website. It looks like it fixes a pretty nasty bug. Get it if you think it applies to you. Unless you have a great reason NOT to upgrade, I would strongly advise you to upgrade to 2011.1.4.2. Why? Because the readme file says they STRONGLY RECOMMEND YOU ALL UPGRADE TO THIS CODE IMMEDIATELY using LOTS OF CAPITAL LETTERS. That's good enough for me. Be sure to run the health check like the readme tells you to. 

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• No analog audio in 13.10

  - by danepowell

  I've installed 13.10 on a machine that was previously running Windows 8, and audio output isn't working out of the box. It worked fine in Windows, and the speakers work fine when hooked up to a laptop, so it must an incompatibility between Ubuntu and the motherboard. If I go to sound settings, "Built-in Audio" is selected (SPDIF is also available). This is an Intel Z77 motherboard with an integrated Creative CA0132 sound chipset. I've tried booting a live image of 13.10 (to check for a corrupt install), and the same problem exists. If I boot a live image of 13.04, the only audio output listed in sound settings is a "dummy" card. I've already tried basic troubleshooting steps, such as removing pulseaudio config directories, force-restarting alsa, and making sure the speakers aren't muted in the alsa mixer. At this point, I'm totally stumped :(

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• Domain mapping issues

  - by Nadya

  I have two domain names - .com & .co.uk bought with 123-reg and just one student Windows hosting pack associated with the .co.uk domain. The .com domain is the main one which people would be trying to access, so I just mapped the domain to the hosting this morning. The problem is that I would really like it to be functional by tomorrow morning and the usual waiting time is 24-48 hours. Is there point in stopping the process and trying with forward it with CNAME record instead, does it take less time? (I can just go back and do proper domain mapping during the weekend) Also, is there a possible way to check whether the domain mapping has been done correctly before these 24-48 hours? From some computers I get 404 Error on homepage.

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• Open a popup window from Silverlight

  - by Emanuele Bartolesi

  Silverlight has a method called HtmlPage.PopupWindow() that opens new web browser window with a specific page. You can find this method in the namespace System.Windows.Browser. If you haven’t in your project, add a reference to System.Windows.Browser. The method HtmlPage.PopupWindow() has three parameters: Uri – location to browse String – the target window HtmlPopupWindowOptions – a class with the window options (full list of properties http://msdn.microsoft.com/en-us/library/system.windows.browser.htmlpopupwindowoptions(v=vs.95).aspx) For a security reason of Silverlight the call to HtmlPage.PopupWindow() is allowed through any user input like a button, hyperlink, etc. The code is very simple: var options = new HtmlPopupWindowOptions {Left = 0, Top = 0, Width = 800, Height = 600}; if (HtmlPage.IsPopupWindowAllowed) HtmlPage.PopupWindow(new Uri("http://geekswithblogs.net/"), "new", options); The property IsPopupWindowAllowed is used to check whether the window is enabled to open popup.

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• How to stop running pidgin at logins and disable window hiding feature?

  - by Behzadsh

  Every time I login into my desktop, pidgin start behind, and sometimes it's bothering me - e.g. when I'm not connected to Internet or when I don't want to be on-line - I check startup application list and there's no pidgin listed. another thing that is very bothering is hiding window feature or what ever it called. assume that you're using MusicTracker plug-in, your status is Busy and you're chatting with someone. when music change, status will change, and then buddy-list will disappear and chat window will minimize. Buddy-list is not important but minimizing chat window when you're chatting is bothering, Is there any way to make pidgin stop that?

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• Windows Telephone Scam Continues to Circulate

  Microsoft addressed the scam via a blog post during the middle of last year. Cyberthieves call homes in English-speaking countries after finding their phone numbers in telephone directories. The callers usually identify themselves as engineers from Windows Support or other legitimate-sounding organizations. They claim that your computer has been sending error messages and may have been compromised. To fix the problem, they offer a free security check. Despite being detected last year, this particular scam is still making the rounds. A recent article by news channel ABC 15 out of Arizona r...

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• Inventory Item Exist checker

  - by Annalyne

  I have a question regarding declaring my inventory. I made it a string named inventory, with a constant number as its max value. The thing is, I want the user to use an item if he / she gains an item. The problem is, I do not know what syntax should I use to determine if the user has an item and use that item. Here's my code I just started: so declaring the inventory: const int MAX_ITEMS = 15; string game_inventory [MAX_ITEMS]; int itemnum = 0; I have some items like potion, antidote, gems and others. I use the: game_inventory[itemnum++] = "Potion" to place items in my inventory. If I want to use the potion, IF I HAVE one, how can i make a function to check whether I have a potion or anything and use it?

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• Why do you have to manually type variable names while debugging?

  - by SoboLAN

  I've seen this in a lot of IDEs (even in the most popular and heavily used ones, like Visual Studio): if you want to watch a variable's value, you have to manually type its name in the Watches section of the debugger. Why can't there just be a list of all of them with checkboxes next to them ? The developer can then just check the box next to the one he wants to watch and that's it. Variables with identical names can probably be numbered in some way (for example a, b, x(1), x(2), c, etc. I've seen some exceptions to this (NetBeans or BlueJ), but there are exceptions to everything, right ? Maybe it's a stupid question, maybe not, but I've always wondered why this is so.

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• I need help pleas help me xorg.conf missing Ubuntu 11.10 can't install driver for my Intel GM965 on my Dell Latitude d630

  - by ??????? ?????????

  I have hard time solving my problem. I have searched the net but nothing worked... I just installed the newest ver of ubuntu 11.10 on my laptop dell latitude d630. Everything works fine but it seems i dont have my video card drivers installed. I have some standart drivers. I try to check out my xorg.conf file but its missing i try to make one from root but it gives me critical error. Its like i dont have X11 installed can some1 please help me here are some of the things ive tryed... """ splash@MDFC:/$ Xorg :1 -configure Fatal server error: Cannot open log file "/var/log/Xorg.1.log" Please consult the The X.Org Foundation support at http://wiki.x.org for help. ddxSigGiveUp: Closing log """ splash@MDFC:/$ sudo cp /root/xorg.conf.new /etc/X11/xorg.conf cp: cannot stat `/root/xorg.conf.new': No such file or directory """" Any ideas help me please...

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• Sharing between new install and Windows 7 boxes not working, either direction. Printers & folders

  - by Steve

  I don't seem to be able to share between my Ubuntu (fresh install) and any of my Windows machines. I tried using this guide: How to Share Folders in Ubuntu & Access them from Windows 7. The problems is that I cannot see the Ubuntu machine in my network pane on the Windows machine. Any Ideas of what I should check? Ultimately what I am looking to do is make mobile media server that I can put in the Van, attach a WiFi router, and stream to an iPad, tablet, laptop, etc. Any advice on setting this up would be appreciated.

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• Why does the homepage rank in exact match and not in broad anymore? [closed]

  - by Claude Pelanne

  My website was ranking on page one for "walking shoes reviews" in broad and exact. It has disappeared in the rankings for broad and yet still ranks in exact match. No indication in the Webmaster tools of anything wrong yet Google analytics shows no more activity. his occurred sometime after Panda and Penguin. Not sure which because I didn't check closely for a while, this is a fun site for me. I walk for the enjoyment and health benefits so I built this site.

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• What`s Coming Up for ASP.NET

  In case you really did miss it, aspConf 2012 is a free, virtual conference dedicated to ASP.NET and organized by and for the community. It was held July 17 and 18. You can check out past conference videos and training sessions here. This year's conference featured more than 60 presentations from speakers both inside and outside of Microsoft. Scott Hanselman, the organizer, gave the second day's keynote speech. The Principle Community Architect for the Azure Web Team, Hanselman started by talking about where ASP.NET is now and some of the aspects that make its users unhappy. He then moved on t...

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• MySQL: Best of Breed Database

  - by Bertrand Matthelié

  Oracle offers best of breed technology at every layer of the stack, from servers and storage to applications. Discover why MySQL is a best of breed database solution for: Web-based applications, including the next generation of highly demanding web, cloud, mobile and social application Distributed applications requiring a powerful and reliable embedded database Custom and departmental enterprise applications on Windows and other platforms Check out our Resource Center to get access to white papers and other resources. And, remember to register for MySQL Connect if you haven’t done so yet. You can still save US$ 300 over the on-site fee – Register Now!

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• Validation and Verification explanation (Boehm) - I cannot understand its point

  - by user970696

  Hopefully my last thread about V&V as I found the B.Boehm is text which I just do not understand well (likely my technical English is not that good). http://csse.usc.edu/csse/TECHRPTS/1979/usccse79-501/usccse79-501.pdf Basically he says that verification is about checking that products derived from requirements baseline must correspond to it and that deviation leads only to changes in these derived products (design, code). But he says it begins with design and ends with acceptance tests (you can check the V model inside). The thing is, I have accepted ISO12207 in terms of all testing is validation, yet it does not make any sense here. In order to be sure the product complies with requirements (acceptance test) I need to test it. Also it says that validation problems means that requirements are bad and needs to be changed - which does not happen with testing that testers do, who just checks correspondence with requirements.

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• Alternative Web model

  - by Above The Gods

  One of the problems web apps have against native apps, especially on the mobile front, is the constant need to re-download each web page on request. Ultimately, this leads to slower performance. Why if web apps only download new pages if they're actually needed, not because they're simply requested. For example: perhaps the server can store a web page version in a cookie. Every slight change to the page on the server-side changes the version number. Now instead of the browser requesting a new page each time, why not just check the version number and have the server send the page if they're different? If the page similar, the user can just use a cached page. I'm sure browsers doesn't necessarily have to change to accommodate changes to this, correct?

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