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• How to perform a detailed and quick 3D performance test

  - by gsedej

  I am wondering how to quickly test performance of my 3D graphics. Since glxgears is not benchmark what should I use. Also glxgears sometimes stuck at 60FPS, you cannot even compare before/after driver update (e.g. adding xorg-edgers PPA). Even glxgears doesn't really work out of box. One possibility is screensavers, but you can't see FPS. I am also not willing to install 600MB nexuiz, specially if I am running on Live-CD. Other 3D games are also very big... Unigine tests are too demanding for opensource drivers (problems with too low OpenGL and probably texture compression (S3TC...)). I would also like to test OpenGL 2.x extentions. How to quickly test your 3D performance?

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• Language-independent sources on collision detection

  - by Phazyck

  While making a Pong clone with a friend, we had to implement some collision detection. For research purposes, my friend dug up a book called "AdvancED Game Design with Flash" by Rex Van Der Spuy. This book was clearly targeted at implementing collision detection in ActionScript, and I also have some problems with how the concepts are presented, e.g. presenting one method as better than another, without explaining that decision. Can anyone recommend some good material on collision detection? I'd prefer it if kept the implementation details as language-independent as possible, e.g. by implementing the concepts in pseudo-code. Language-specific materials are not completely unwelcome though, though I'd prefer those to be in either Java, C#, F# or Python or similar languages, as those are the ones I'm most familiar with. :-) Lastly, is there perhaps widely known and used book on collision detection that most people should know about, like a 'the book on collision detection'?

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• failing to boot after ''succesfully'' restoring from deja dup backup

  - by Jake

  Before upgrading to 12.04, I completely backed up 11.10 oneiric with deja-dup. In 12.04 I had major nvidia-related problems, so I decided to roll back to 11.10. I tried to restore from the backup and at first failed several times with "an uknown error occured". I reformated my hard drive, installed a fresh copy of 11.10 on the hard drive, and tried the restore again, with no success. I then booted from a live usb and ran the restore again after mounting the file system. I chose the restore location to be "file system" and the restore completed successfully, or so it said. After restarting my PC, all I got was a 'no operating system' error. I remounted my partition chrooted and installed the kernel. I am working now but my question concerns the restore. Why didn't the restore worked? I'm hoping someone has thought of something that I have not.

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• Ubuntu 12.04 shut down freezes

  - by sam

  I am using Ubuntu 12.04 for last one month without any problem. It was upgraded from Ubuntu 10.10. Recently I needed to replace my hard disk. After replacement I installed Windows 7 and Ubuntu 12.04 on the system. For some days it went ok, but now shutting down from Ubuntu is causing problems. It freezes on the text screen saying acpid=exiting checking for running unattended upgrades. After that I waited for a long time, but it didn't go off and I had to hit ctrl+alt+del to restart the system and booting from Windows and then shutting down from there. This happens every time I shut down my system from Ubuntu. I have seen many posts regarding the same kind of issues but none of the solutions reported there helped me out.

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• Rails Launcy - open Chromium

  - by tandu

  I'm developing in rails on my computer. I'm just going along with what tutorials say, and I simply cannot find anything about how to use launchy during development on the Internet .. period. There are two problems: I'd like launchy to open Chromium (it opens Firefox). Chromium is set as my default browser. I save files constantly, and launchy will run each time, which is terrible. Is there any way to only get it to run when you actually want? This also applies to guard, but it's not nearly as annoying with guard.

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• How to make Bluetooth headset appear as a sound device?

  - by torbengb

  I have an onboard VIA sound card but no speakers attached. Instead, I want to use my bluetooth headset as my only sound device, both input and output (mono). I plugged in the bt dongle and was impressed that it was ready to use within seconds. I then paired it to my Jabra BT500 headset. No problems so far. I then went to Sound Preferences but no bluetooth is listed, only the onboard VIA sound card. Question: How can I enable my headset, and make it the default all the time?

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• After installing ubuntu 12.04 my internet connection has completely disappeared

  - by Tony

  On my PC after installing Ubuntu 12.04 my networks are completely gone. Inside the terminal, after typing in nm-tool I get the following: The program nm-tool is currently not installed. You can install by typing: sudo apt-get install network-manager After I type that in then my password I get this: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: network manager : Depends: iputils-arping but it is not going to be installed E: Unable to correct problems, you have held broken packages I'm a complete novice when it comes to computers so I have no clue.

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• Usefulness of the Backlinks shown in Webmaster Tools

  - by Ewan Heming

  Is the list of links for a site shown in Google Webmaster Tools a complete list or just a sample? I've noticed that the links in there appear to be all the ones I didn't think would have any real value - either because they were nofollow or from irrelivant sites. The few I did think would be some use have never shown up and there's also some links that are sometimes there and sometimes not (such as my linkedIn profile). Does this mean that the missing links don't/no longer carry any value? It almost appears that the list is there for Google to either inform you about problems (there was a useful list there when someone tried to SPAM my site) or mis-imform you about which link-building strategies work or not (to keep people guessing about what works or not).

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• SharePoint 2010 is great! Now what do I do?

  - by PeterTweed

  So you have the power of SharePoint 2010 as a platform. What are you going to do now? How about build upon the power of the SharePoint product and implement solutions to business problems that are intuitive, easy to use, integrated, have a rich user experience and delivered over the web? Sounds good doesn’t it! Come to the April East Bay .NET User Group meeting and watch to me show you how easy it is to build Silverlight applications on top of SharePoint 2010 that can be quickly developed, delivered and will wow your stakeholders. See you there!

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• Mounting ntfs windows drive and retrieving its data

  - by Sarmad

  Hej, A friend gave me his laptop which had problems with booting (windows). He claims his data on the drive to be retrieved and saved. I have Linux Ubuntu Server to mount its hard drive and check the contents. Now when I have mounted it I see only boot.sdi, sources, System Volume Information I have no idea why is it so? How can I access and retrieve the contents? results of sudo fdisk -l are as follows: Enhet Start Början Slut Block Id System /dev/sdb1 2048 3074047 1536000 27 Hidden NTFS WinRE /dev/sdb2 * 3074048 246945791 121935872 7 HPFS/NTFS/exFAT /dev/sdb3 246945792 416354295 84704252 7 HPFS/NTFS/exFAT /dev/sdb4 416354304 488394751 36020224 f W95 Utökad (LBA) /dev/sdb5 416356352 488394751 36019200 7 HPFS/NTFS/exFAT Please help me in this regard.

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• Ubuntu missing from hard drive boot

  - by Eoghan

  Ubuntu is the only OS installed on my Acer netbook. Few, if any, problems until, with no warning, it vanished from the boot list for the hard drive. I have been a ble to create a bootable USB to be ablee to use the netbook but have not been able to restore Ubuntu to the hard drive boot list. As you can probabaly tell from the way the problem is described, I am a complete novice so any help you can give should assume no knowledge at all on my part and should be written as if for a simpleton. Thank you.

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• Calculate the intersection depth between a rectangle and a right triangle

  - by Celarix

  all. I'm working on a 2D platformer built in C#/XNA, and I'm having a lot of problems calculating the intersection depth between a standard rectangle (used for sprites) and a right triangle (used for sloping tiles). Ideally, the rectangle will collide with the solid edges of the triangle, and its bottom-center point will collide with the sloped edge. I've been fighting with this for a couple of days now, and I can't make sense of it. So far, the method detects intersections (somewhat), but it reports wildly wrong depths. How does one properly calculate the depth? Is there something I'm missing? Thanks!

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• Ubuntu 12.10 desktop/interface not showing on VirtualBox VM after login screen

  - by Jake

  I'm having some trouble with getting my Ubuntu to work on a VirtualBox VM. I made a clean installation of Ubuntu 12.10 on a VM without any errors. I arrive at the login screen, as soon as I press enter it does it's little loading thingy and then screen goes black, then this is all I get: http://i.imgur.com/zULUI.jpg I can access the terminal and pretty much all the other features through it, but I would like to have the GUI properly working. I've been looking around the web and looking at various fixes to similar problems, but can't seem to get it to work. I'm thinking this problem might have to do with the graphics? I'm running Windows 8 Pro as host, if that helps, might be some compatibility issues with VirtualBox in W8... Thanks in advance!

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• As a Junior Software Engineer should I say that something has been done wrong if I feel so?

  - by Why123

  I recently joined a company and it is my first job. When reading the code base, I felt that the code was not well written. It seemed to me that the code had most of the problems mentioned here and also seemed to have an Anemic Domain Model. There are no unit tests and they don't employ any code quality checking tools like findbugs or pmd. The problem I have is that the code is very difficult to understand. Maybe my conclusions are wrong because I am not that experienced. I need advice on whether to communicate the above facts to a superior or not. If I am to communicate, to whom(Tech Lead, Architect, Product Manager) and how? And if I do communicate will they take it badly since I'm a Junior and has no experience?

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• 6 Ways To Secure Your Dropbox Account

  - by Chris Hoffman

  Dropbox is a hugely popular cloud storage service beloved by many. Unfortunately, it’s had a history of security problems, ranging from compromised accounts to once allowing access to every Dropbox account without requiring a password for several hours. If you’re using Dropbox, there are a variety of ways you can secure your account against unauthorized access and protect your files even if someone does gain access to your account. Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder? Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It How To Delete, Move, or Rename Locked Files in Windows

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• Ubuntu always freezes on a friend's machine

  - by missingfaktor

  I am posting this on my friend's behalf. I installed Ubuntu 12.04 on my friend's computer but it continuously froze, no desktop effects worked, and it was frankly unusable. I thought this might be an issue with Unity and how it interacts with his hardware, so I tried several other desktop environments on his machine. These include KDE, Xfce, and GNOME. The problems persisted regardless of the desktop environment. I would like to note that he dual boots his system with Windows 7. Even there no desktop effects work but the system is reasonably stable. The following screenshots describe some of his system information (He is running Xfce at this time): 1: 2: Card information: intel corporation 82G33/G31 integrated graphics controller (rev02). What is the issue and how can it be solved? Please let me know if I should add any more information. Thank you.

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• AMD Catalyst diskless cluster

  - by Nathan Moos

  I'm using Ubuntu 13.10 to set up a diskless compute cluster. When I use the procedure detailed in https://help.ubuntu.com/community/DisklessUbuntuHowto, I successfully am able to boot all four nodes. However, once I install Catalyst, I immediately have problems: only one diskless node boots properly, with the other two hanging while attempting to start X. My assumption is that my Catalyst build was somehow specific to the node which I booted from first, which somehow prevents the other nodes from loading Catalyst. Can anyone provide hints to help solve this? Thank you in advance!

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• Marketing for Scheduled Online Events

  - by JT703

  Last year I started working with a team on our first major web project (We, the Pixels). I believe the idea is very solid, but it has a hard requirement for a group of people being on the site for the randomly scheduled events. We are having problems getting people to come and stay for these events. What is the proper marketing approach needed to bring people to the site for these events? We have recently done the following in an attempt to fix the problem: Added email notification of new events being created Added privileges based on rank Added text throughout the site encouraging setting up the events in the future so other users can have time see that it exists. Gotten involved in with other communities that would find the site interesting in order to promote (market) the site Advertised using Google Adwords Is there an standard marketing approach for such a case as this?

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• Story and news-feed ideas for social network games

  - by arpine

  I am currently working on a educational and fun 2-in-1 game. As I am not a professional, I need advice on story and news-feed. The goal is simple-get richer, the story is about a worker who is trying to get over his/her financial problems and become rich. During the whole gaming process there is a news-feed (every day there are a couple of fresh news about what is going on). The news are fresh and individual so I need to write about 2000 pieces of news for 2 year gaming, maybe more. The problem is that I am not sure whether repetitive news can interest in this game. What can be done to make the news-making process easier but not boring from the point of view of the player?

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• ubuntu 12.04 internet stopped working

  - by Daniel

  My laptop was running smoothly until yesterday. Today, I can't connect to the internet at home anymore. I am only able to access the router, but no internet access. A have a Dell Latitude E6320 with ubuntu 12.04. At my job, I don't have any problems connecting this laptop both via wireless and ethernet. At home, if I try connecting it through Windows it does work fine. I even checked the MAC addess and it's OK. My other laptop, which also runs ubuntu, is not facing this problem. I have already tried to restart and downgrade network-manager package and its dependecies. Anyone can help me please??? I am affraid I will have to reinstall everything...

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• "Wireless disabled by hardware switch" after suspend and other hardware buttons ineffective - how can I solve this?

  - by fahadayaz

  I have recently purchased a Novatech nFinity N1410 laptop and am having problems with the wireless, which sudo lshw -C network tells me is Centrino Wireless-N 2230 and using the iwlwifi driver. The problem is that after the device has been suspended, I am not able to get the wireless working again without a restart. The network indicator states that the wireless disabled by hardware switch. Though Fn+F2 is meant to be the wireless switch, xev tells me that the system doesn't see it as anything at all when I press this hardware combination. Also, though the brightness up/down buttons work fine, the volume up/down buttons do not work either. What can I do to fix this? I am running Ubuntu 12.10 with all available updates installed.

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• Boot delay and mouse lag at login after Ubuntu 12.04 update

  - by Roshan George

  I am facing these weird problems after updating Ubuntu 12.04 with apt-get update && apt-get upgrade: It takes too much time to come to the Plymouth theme after selecting Ubuntu from the grub menu. Is it possible to correct this? On the login screen, before entering the password, whenever I move the mouse, it is kind of lagging/stuck. Only after entering the password and pressing Enter, it works normally. I think this may be because of the updated kernel. If so, is it possible to downgrade the kernel to the previous one ? If that is not the reason, what can be the problem?

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• Ubuntu Server 12.04 start fails after update

  - by Abbgrade

  I did an system update on ubuntu server 12.04, which requestet an reboot. Since that, the system never reaches the login. It hangs on: mount: mounting /dev on /root/dev failed: No such file or directory done. mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /proc on /root/proc failed: No such file or directory Target filesystem doesn't have requested /sbin/init. No init found. Try passing init= bootarg. BusyBox v1.18.5 (Ubuntu 1:1.18.5-1ubuntu4) build-in shell (ash) Enter 'help' for a list of build-in commands. (initramfs) i tried already to repair it using a live system: + Mounting the filesystems (/boot ext, / btrfs) + fsck ran without problems. + /etc/fstab seems to be OK. + apt update/upgrade on chroot succeed. now, i have no more ideas :/

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• Using IE 9 as my primary browser

  - by Robert May

  With the release of Internet Explorer 9 RC the browser looks to be in a usable state.  So far, my experience has been positive. However, one area where I am having problems is when people are using the jQueryUI library.  Versions older than 1.8 cause IE 9.0 to be unable to drag and drop.  This is a real pain, especially at sites like Agile Zen, where dragging and dropping is a primary bit of functionality. Now that IE 9 is a release candidate, we’ll see how quickly these things improve.  I expect things to be rough, but so far, I’m really liking IE 9.  There’s more real estate than Chrome (it’s the tabs inline with the address bar) and its faster than Chrome 9.0 and FF 3.6.8 (as tested on my own machine). The biggest drawback so far is that because IE has been so badly behaved in the past, sites expect it to be badly behaved now, which is breaking things now. Technorati Tags: Internet Explorer

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• What software do you use to help plan your team work, and why?

  - by Alex Feinman

  Planning is very difficult. We are not naturally good at estimating our own future, and many cognitive biases exacerbate the problem. Group planning is even harder. Incomplete information, inconsistent views of a situation, and communication problems compound the difficulty. Agile methods provide one framework for organizing group planning--making planning visible to everyone (user stories), breaking it into smaller chunks (sprints), and providing retrospective analysis so you get better at planning. But finding good tools to support these practices is proving tricky. What software tools do you use to achieve these goals? Why are you using that tool? What successes have you had with a particular tool?

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