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• wireless not working, but wired does

  - by user211762

  First of all I'm new to Ubuntu, just bought a laptop with Ubuntu yesterday. I disable wireless networking in the upper right corner, and I don't have option to enable it back. I tried a lot of things and none is seems to work: I installed Wicd network manger, and it says no wireless network found, but i assure you there are several of them as my smart tv can detect them. when I type rfkill list, I get this: 0: dell-wifi: Wireless LAN Soft blocked: no Hard blocked: no when I type ifconfig wlan0, I get this: wlan0: error fetching interface information: Device not found

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• Why are the proposed BADSIG (on apt-get update) fixes secure?

  - by EvanED

  I'm running apt-get update, and I see errors like W: GPG error: http://us.archive.ubuntu.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <[email protected]> It's not hard to find instructions on how to fix these problems, for instance by asking for the new keys with apt-key adv --recv-keys or rebuilding the cache; so I'm not asking about how to fix these. But why is this the right thing to do? Why is "oh, I need new keys? Cool, go get new keys" not just defeating the purpose of having a signed repository in the first place? Are the keys signed by a master key that apt-key checks? Should we be doing some additional validation to ensure that we're getting legitimate keys?

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• Algorithm for determining grid based on variably sized "blocks"?

  - by Lite Byte

  I'm trying to convert a set of "blocks" in to a grid-like layout. The blocks have a width of either 25%, 33%, 50%, 66%, or 75% of their container and each row of the grid should try to fit as many blocks as possible, up to a total width of 100%. I've discovered that trying to do this while leaving no remaining blocks in the original set is very hard. Eventually, I think my solution will be to upgrade/downgrade various block sizes (based on their priority or something) so they all fit in to a row. Either case, before I do that, I thought I'd check if someone has some code (or a paper) demonstrating a solution to this problem already? And bonus points if the solution incorporates varying block heights in to its calculations :) Thanks!

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• Image caching when rendering the same images on different pages

  - by HelpNeeder

  I'm told to think about caching of images that will be displayed on the page. The images will be repeated throughout the website on different pages and I'm told to figure out the best way to cache these images. There could be few to dozen of images on single page. Here's few questions: Will browser caching work to display the same images across different web pages? Should I rather store images in stringified form in a memory instead, using JavaScript arrays? Store them on hard drive using 'localStorage'? What would be easiest yet best option for this? Are there any other alternatives? How to force cache? Any other information would be greatly appreciated...

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• Ubuntu 14.04 Fatal Exception

  - by user286534

  I use Ubuntu 14.04, 64-bit. I installed Virtualbox and was testing another Linux OS (Deepin). My system froze and I could not get to a TTY session to reboot. I had to do a hard restart and when Ubuntu restarted I got various error codes one of which was "kernel panic - fatal exception in interrupt" Booting to Advance mode and attempting repairs did not work (fsck, grub repair, etc) I reinstalled Ubuntu and chose the option to keep my files intact. I can now access my system but many programs I have installed do not work. My question is; I have a Deja-Dup backup (but only of my Home directory), is it better to restore my backup files or do I have to reinstall all of my programs? The weird thing is, the programs I verified using the Software Center to see if they were installed are checked as installed, but won't appear in Dash.

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• Maven Command Line for NetBeans RCP Developers

  - by Geertjan

  In the ongoing work being done on Maven documentation support for NetBeans Platform developers, the tutorial describing how to use the Maven command line to set up and develop applications on the NetBeans Platform has ben updated: http://platform.netbeans.org/tutorials/nbm-maven-commandline.html An interesting next step after following the tutorial above is to... open the result into the free community edition of IntelliJ IDEA: It's not hard to register the JDK and Maven in IntelliJ IDEA and to then run your application directly from there. The point is that there's no requirement to use NetBeans IDE if you want to create applications on top of its framework.

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• Repositories and the Save Method

  One of the questions I've been getting lately goes like this: Should a Repository class have a Save method? And the standard answer: It depends. It's hard to keep track of all the different approaches to implementing the repository pattern these days, but I assume when someone asks me this type of question they are thinking of using code like this: var employee = new Employee(); employeeRepository.Save(employee); var account = new Account(); accountRepository.Save(account); This...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 to tell Wine that I have changed CD when mounting them virtually on a netbook with no CD drive?

  - by glenatron

  I have been trying to catch up with some of the old games from way back that are about right for my little Aspire One netbook through Wine. I've run into a problem Baldurs Gate, however, which is that I can't change CD. Obviously, I don't have a CD drive, so I have copied the CD content onto an external hard drive and I'm using a mount command with the loopback option to persuade the game that the CD is present. This allowed installation to work correctly and works fine to run it and to play the content from the first CD. However, when the game asks for CD2, I'm stuck. If I mount the CD2 ISO to the CD Rom path it doesn't appear to respond, whether or not I have first unmounted CD1. When I ask Wine to show me the CD drive it contains the right data, but it seems as though whatever signal would be interpreted by Windows to mean the CD drive has been closed isn't being sent. Does anyone know of a way to do this, or am I barking up the wrong tree and there is something else I need to do?

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• Script to create dynamic PIVOT queries in SQL Server

  Pivoting is a common reporting requirement - data is stored in columns and you need to present it in rows. This was a nice feature that was added to SQL Server, but you don't always know all of the values you need to pivot on. This tip looks at how you can dynamically create the pivot command to handle these unknown values. Top 5 hard-earned lessons of a DBAIn part one, read about ‘The Case of the Missing Index’ and learn from the experience of The DBA Team. Read now.

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• Why do so many people dislike C++?

  - by General K

  Beginners and professional, on blogs, in forums and chatrooms - people say it everywhere: C++ oh dear god no The short form of the question: For what reason is C++ so widely disliked and people are horrified by the imagination of using it for some project? I have been using a lot of different languages, including C++ by now, and I can only say that I really like it. I'm far more horrified by Delphi than by C++. Actually, I find it's an almost perfect, compiled language! I've been doing a lot of different projects in C++ as well, ranging from 3D video games to webservers and emulators for old video game consoles. And I still do not see the problem everyone else seems to have with it! It was hard for me to get into it of course, as it is quite complex and has a lot of depth, but after that it's simply great.

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• Ask The Readers: What’s Your Favorite Co-Op Game?

  - by Jason Fitzpatrick

  For many readers, the weather is getting chillier and that means more time indoors. What better time to take a look at the best co-op games around? Jump in and put in a nod for your favorite game and setup. Wallpaper available here. Whether you’re playing DS-to-DS with your spouse, inviting all your buddies over for a whole-house LAN fest, or couch co-op’ing through your favorite RPG, we want to hear all about your favorite games and the ways you play them. Sound off in the comments with your co-op tips and tricks; make sure to check back in on Friday for the What You Said roundup to find some new titles to tide you over until the warm weather comes around again. How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems 7 Ways To Free Up Hard Disk Space On Windows

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• What is needed to become a skillful and professional software developer ?

  - by silentbang

  I am interested in studying algorithms and my strong points are problem-solving and logical thinking. However what I am guided toward is web-developing languages, SQL and they seem to not exploit the best out of me. I think it's because lots of people can learn these things easily, even steal ideas and copy code. Is that wrong? I was told that "learning algorithms is just for optimization, so you just need to know it (not a deep understanding)", but I think algorithms are my savior; it differentiates one man's abilities from others'. Also I'm learning C++ to benefit my future career. Many people say that web developer is a future trend, which worries me. I don't know what I need to standout in my career, and should I balance between web and software developing or just one? Should I work hard on algorithms?

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• VB 2010 LOGIN 3-TIMES LOOP [migrated]

  - by stargaze07

  How to put a loop on my log in code it's like the program will end if the user inputs a wrong password/username for the third time? At this point I'm having a hard time putting the loop code. This is my LogIn Code in VB 2010 Private Sub btnLogIn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogIn.Click Me.Refresh() Dim login = Me.TblUserTableAdapter1.UsernamePasswordString(txtUser.Text, txtPass.Text) If login Is Nothing Then MessageBox.Show("Incorrect login details", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error) Else Dim ok As DialogResult ok = MessageBox.Show("Login Successful", "Dantiña's Catering Maintenance System", MessageBoxButtons.OK, MessageBoxIcon.Information) MMenu.Show() MMenu.lblName.Text = "Welcome " & Me.txtUser.Text & " !" If txtPass.Text <> "admin" Then MMenu.Button1.Enabled = False ProdMaintenance.GroupBox1.Visible = True MMenu.Button2.Enabled = True MMenu.Button3.Enabled = True MMenu.Button4.Enabled = True Else MMenu.Button1.Enabled = True ProdMaintenance.GroupBox1.Visible = True MMenu.Button2.Enabled = True MMenu.Button3.Enabled = True MMenu.Button4.Enabled = True End If Me.Refresh() Me.Hide() End If End Sub

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• Viewing VMware Counters in PerfMon for SQL Server

  I want to ensure that my SQL Server on a VMware Guest OS is getting the resources it should. This would go a long way towards helping isolate the performance problems we're experiencing. However, our system administrators won't give us access to VirtualCenter or any of the tools they use. Is there anything I can do? Check out this tip to learn more. ‘The Case of the Missing Index’Discover the Top 5 hard-earned lessons of a DBA, presented by The DBA Team. Learn from lesson one now.

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• Greenfoot project is read-only

  - by AzharHafiz.com

  I received this message when starting greenfoot on ubuntu 11.10 I'm a newbie and not sure where does the file located (greenfoot) The project is read-only.How and where do I change the permission? You will not be able to create objects or execute methods. Either the access rights of the project directory are set as 'read only' for you, or the whole file system is not writable (is it a CD?). To fully use this project, you must ensure that it is on a writable file system (usually your hard disk), and that you have write permission in the project directory and each file within it. This can often be accomplished by choosing "save as" from the Project menu after closing this dialog.

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• Ubutnu 12.04 mdadm inactive

  - by user32274

  For a while now, my RAID 5 has ceased to work. Everytime I tried "madm --detail /dev/md127", its states all the drive and drive info, but that two of the drives have been removed. After some restarts, doing the same thing, i am getting /dev/md127 does not appear to be active. When I go into DiskUtil, I can see all 6 Hard Drives healthy and present, and i can see the Raid 5 at the bottom under Multi-disk Devices. However, the Raid says 0.0kb, and is not active. Please help and let me know how to proceed from here. I would really like to avoid rebuilding the RAID, especially because all 6 drives seem to be healthy and present. Thanks so much.

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• SharePoint Database security corruption

  - by H(at)Ni

  Hello, One time I faced an issue where my customer is having an HTTP 500 internal server error while trying to access any SharePoint site. The problem appeared once he moved back and forth with inheriting/breaking inheritance of permissions over different levels in the site collection. "Security corruption in database" sounds very tough for a customer running a production portal with a backup that can make him lose around 3 weeks of valuable data. However, the solution tends not to be that hard, there's an stsadm command that help us detect the corruption and even delete the orphaned items causing the corruption. Follow these steps: a. stsadm -o databaserepair -url http://SITEURL -databasename DBNAME                and it returned some orphaned items.            b. stsadm -o databaserepair -url http://SITEURL -databasename DBNAME -deletecorruption                and it removed the orphaned items. Cheers,

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• What are the challenges and benefits of writing games with a functional language?

  - by McMuttons

  While I know that functional languages aren't the most commonly used for game writing, there are a lot of benefits associate with them that seem like they would be interesting in any programming context. Especially the ease of parallelization I would think could be very useful as focus is moving toward more and more processors. Also, with F# as a new member of the .NET family, it can be used directly with XNA, for example, which lowers the threshold quite a bit, as opposed to going with LISP, Haskell, Erlang, etc. If anyone has experience writing games with functional code, what has turned out to be the positives and negatives? What was it suited for, what not? Edit: Finding it hard to decide that there's a single good answer for this, so it's probably better suited as a community wiki post.

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• Unity 3D in 11.10 with VirtualBox in OS X?

  - by Roshambo

  I'm having a horrible time with Unity 3D in Ubuntu 11.10 running in a VirtualBox VM in OS X. Such a hard time, in fact, that I'm about to give up and conclude that it simply isn't possible to use Ubuntu 3D in a configuration like this. The problem with is that windows simply do not render. I've found that killing Nautilus makes the problem go away, but that's really not much of a solution. I have installed the guest additions and am running the VM with 2048 MB RAM, 128 MB video memory, and have enabled 3D acceleration. I've tried all this on several Macintoshes, with no luck. Unity 2D, on the other hand, works fine across the board. Any advice or experience would be greatly appreciated.

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• Grub rescue doesn't allow me to boot from LIVE CD/USB

  - by Thameem

  I used to have Windows Vista & Ubuntu 12.04 on dual boot. Accidentally, I deleted the Linux partition and landed on Grub rescue on the next boot. The tricky thing for me here is I have been trying to boot through LIVE CD/USB of the ubunutu version, other linux versions but in vain. What happens is, it appears as if it reads the CD/DVD drive or the USB flashes for a while when trying to boot through LIVE versions but the Grub rescue appears after a while. The only option I could think here is to remove the hard disk and connect to the other laptop I have through USB and reinstall a fresh OS. Please suggest me a way to boot through the DVD/USB again. My laptop is Sony VAIO CR32 series.Thanks.

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• Installing Ubuntu before or after upgrading from Vista to Win 7?

  - by amh

  I just got a new SSD hard drive for my thinkpad laptop. I just installed Vista with the factory CDs. On my old OS, my main OS was Ubuntu but I do want to keep Windows on a separate partition as a dual booth system. I definitely want to upgrade to Win 7 though and I will get it in a few days. My question is: should I install Ubuntu now and then upgrade to Win 7 in a few days? or is that going to mess up with the grub (or something else)? If that is the case, then I'd rather wait to install Ubuntu until after I upgrade to Vista. P.S. I know that probably any kind of mess done by the Win upgrade could be fixed, but I just want to avoid wasting time.

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• What program to use to create subtitles for a video?

  - by user4124

  I have a video that I want to create subtitles for. Is there a program that can perform rudimentary speech-to-text in order to set the correct start/stop of each individual subtitle create rudimentary text subtitles (using some sort of speech-to-text) I know about gnome-subtitles. However, it requires extensive effort to create those subtitles manually. You need to select yourself the start and stop for each sentence. Youtube has the above features (creates rudimentary text subtitles at the correct timings, using speech-to-text). However I would rather not upload the videos to Youtube just to get my subtitles. Is it possible to do the subtitles efficiently in Ubuntu? Update: I plan to use the .srt subtitles only, and do not need to hard code them on the videos. My biggest requirement is to have the program automatically find the start/stop for each sentence, so that I write the text in it.

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• Why does my FPS drop gradually over time?

  - by mmankt

  I'm working on this game: yt alpha preview I came into a huge game-breaking problem - after 10-15 min of gameplay the FPS drops from 60 to 30 and is very unstable. I'm using tons of physics and particles, I'm deleting and nulling everything I can after it's supposed to be removed, I remove objects from vectors etc. The memory usage is stable at around 150mb so a leak is unlikely (or invisible?)- after a round ends and I delete everything, play a new round and performance is still terrible. I spent two days trying to figure this out and I just can't fix it. Maybe I'm missing something? I know it's hard to help with no code but I would just have to post my whole source.

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• What is an achievable way of setting content budgets (e.g. polygon count) for level content in a 3D title?

  - by MrCranky

  In answering this question for swquinn, the answer raised a more pertinent question that I'd like to hear answers to. I'll post our own strategy (promise I won't accept it as the answer), but I'd like to hear others. Specifically: how do you go about setting a sensible budget for your content team. Usually one of the very first questions asked in a development is: what's our polygon budget? Of course, these days it's rare that vertex/poly count alone is the limiting factor, instead shader complexity, fill-rate, lighting complexity, all come into play. What the content team want are some hard numbers / limits to work to such that they have a reasonable expectation that their content, once it actually gets into the engine, will not be too heavy. Given that 'it depends' isn't a particularly useful answer, I'd like to hear a strategy that allows me to give them workable limits without being a) misleading, or b) wrong.

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• Is It Possible for My Router to Wear Out?

  - by Jason Fitzpatrick

  Day after day your humble and hard working router holds your home network together and links it to the greater internet. Is it possible to work it to death? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. HTG Explains: How Antivirus Software Works HTG Explains: Why Deleted Files Can Be Recovered and How You Can Prevent It HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

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