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• Ubuntu Australia LoCo Team

  - by benonsoftware

  Well first I would like to add at the moment I have had 1174 page views. That does not count people who just browse via the homepage so add around another 200 visitors! Well back on the subject I have recently joined Ubuntu-AU (Australia) LoCo team and it is great! Basilar it is a Ubuntu loco community group and just before the my first time being at a meeting I was emailing the admin and he said that there was a stop for a team reporter and I put my hand up and he said 'yes'. He was actually going to ask at the team meeting I would have said no way! But because I saw it before hand and I asked him I wanted to do it. If you live in Australia consider join Ubuntu-AU they also have a Launchpad team.

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• Gnome/X logs off immediately after login -- which logfiles are relevant?

  - by joebuntu

  I've been tinkering with fingerprint-gui as well as X/xrandr resolution settings. When I start my machine, it boots up normally. As soon as X and gnome have finished starting, it logs me off automatically and brings me back to the gdm login prompt with the user list. Then I am, however, able to log in using "Ubuntu Desktop Fail-safe". I've checked the list of start-up applications, but everything seems fine there. I can't yet put my finger on what exactly might be responsible for this: X, gnome or some messed up pam.d settings. So far I've checked /var/logs/X11/xorg.0.log, /var/logs/auth.log and ~/.xsession-errors. In addition, I don't quite seem to understand the "interplay" between X, GDM, GNOME, GNOME-policykit, PAM.d and all that. Are there any other relevant log files that could point me to what's broken? Specs: Ubuntu 10.10 Maverick Meerkat IBM/Lenovo Thinkpad R60, ATI Radeon x1400 Mobility all updates installed Linux User 1 year+,

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• Nifty gui hide/show image

  - by Mario

  I have a simple screen made with Nifty gui. On this game screen I want to put a simple image controls sound: just on and not. So I have two images to switch and get music stop or run. Problem is: how can I hide/disply an image with nifty gui? Here my java code when player click on image: Screen screen = nifty.getCurrentScreen(); Element el = screen.findElementByName("iconOn"); el.setVisible(false); el = screen.findElementByName("iconOff"); el.setVisible(true); This code doesn't work :( Thanks to everyone could help me

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• How can I prevent VirtualBox from changing the permissions on the .vbox File?

  - by KevinC

  I'm currently running Ubuntu 13.04, and I've got a Windows 8 VirtualBox VM installed. I put the VM's folder in a shared folder (/home/sharedHome/) that has read and write permissions assigned to the vboxusers group. This allows me to launch the VM from my account and my wife can launch it from hers. The only problem is that when you launch the VM from either account, the permissions get changed so that only that user has read and write privileges on the .vbox file. After this happens, the other account can't launch the VM unless I go in and change the permissions again. Does anyone know how to prevent VirtualBox from changing the permissions? Is there a better way to share a VM between users? Thanks!

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• Is it possible to use two different shells for different terminal windows?

  - by NES

  Is it possible to use another shell for scripts than for standard terminal use? The problem is, i use fish as shell at the moment and i find i very convenient. But i would like to learn a bit of shell programming in Ubuntu. Since there are differences between those two it would be nice, to work with fish and bash at the same time, perhaps in different terminal windows? i know i can write a shell script and have to put the interpreter in the beginning. But for testing developing at commandline i would find it useful to fast switch between shells or use two different terminal windows with different shells in one session at the same time?

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• XNA 2D Rotated Rectangle Collision Response

  - by Kyle Uithoven

  I am using Rotated Rectangles which collide using the Separating Axis Theorem and they work perfectly fine for collision detection using Intersects and Contains. However, I am starting to use faster objects in my game now and there is the issue of the two object overlapping during collision due to their higher velocities. I would like to do a collision response where I find out how much they are overlapping in the X and Y and put position them outside of each other. I would like to use something like this: http://go.colorize.net/xna/2d_collision_response_xna/index.html. But I am having some issues trying to adapt this to handle the rotation of the bounds. Is this possible? Are there any resources out there that I can look at?

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• How many threads should an Android game use?

  - by kvance

  At minimum, an OpenGL Android game has a UI thread and a Renderer thread created by GLSurfaceView. Renderer.onDrawFrame() should be doing a minimum of work to get the higest FPS. The physics, AI, etc. don't need to run every frame, so we can put those in another thread. Now we have: Renderer thread - Update animations and draw polys Game thread - Logic & periodic physics, AI, etc. updates UI thread - Android UI interaction only Since you don't ever want to block the UI thread, I run one more thread for the game logic. Maybe that's not necessary though? Is there ever a reason to run game logic in the renderer thread?

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• Changing location after CommitAnimations

  - by Will Youmans

  I'm using the following code to move a UIImageView: shootImg.image = [UIImage imageNamed:@"Projectile Left 1.png"]; [UIView beginAnimations:nil context:nil]; shootImg.center = CGPointMake(shootImg.center.x+1000, shootImg.center.y); [UIView commitAnimations]; This works but what I want to do is after [UIView CommitAnimations]; I want to set the location of shootImg using CGPointMake. If I just put it after commitAnimations then the animation doesn't fully complete. Any suggestions? I'm not using any frameworks like cocos2d and if you need to see any more code just ask.

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• How to configure kubuntu for lightweight low-memory usage?

  - by augustin

  I just upgraded an old, secondary computer to the latest Kubuntu (10.10). It seems the effort was a bit too much for the hardware and one 512MB memory module died. I tried to take it away, clean the connectors, put it back several times, but to no avail. Until such a time I can find a second hand DDR memory module, I am left with a meagre 256MB RAM, which is below the official requirements (384MB) to run Kubuntu/KDE. Indeed: the computer constantly swaps the memory, making everything painfully slow. Since Kubuntu is already installed and I use it on all my computers (and I want to keep KDE for when I really need it), how can I configure Kubuntu to squeeze out every bit of unnecessary memory usage? This is a secondary computer but still very useful. We use it mostly for web browsing. A "lightweight" tag is missing.

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• What is the possible disadvantage of putting declarations in inner blocks, instead of at beginning of function?

  - by shan23

  At the place where I work, there are explicit guidelines for placement of declarations of variables. According to that, it is required to put them at the global level and / or at the beginning of functions, and not in inner blocks (such as a for loop). Since they've been specified by persons more experienced than I am, I'm sure that there must be a good reason for it, but I cannot figure out what that might be. It would be nice to know if there are any compile time / run time advantages at having them declared at a bigger scope.

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• Issues with external mounting after pysdm removed

  - by K. R. Huard

  So, I'm very new to ubuntu. I was having troubles getting my external hard drive to be read/write permission. It's owner is my macbook, and writing on the drive was repeatedly denied. In trying to sort this out, I tried the Nautilus commands (no success), installed the PYSDM application, changed some things (as suggested by this user in this forum http://askubuntu.com/a/113992 )but then found that I was getting an error message whenever I tried to mount an external storage device. The error is: Unable to mount DERPSTICK error mounting: mount exited with exit code 1: helper failed with: [mntent]: line 14 in etc/fstab is bad mount: only root can mount /dev/sdc1/ on /media/sdc1 Others with similar problems put their fstab up here, but I'm not sure how to bring it up, or if I should even try. Thanks for your time!

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• What tool do you use to create SVGT icons for your app?

  - by teukkam

  This is a question mainly for Symbian developers. I would like to create some demo apps to put on my mobile phone and have some kind of nice icon on the application grid. If I've understood correctly, the application grid icon needs to be in SVG Tiny format. The problem is I don't have any toolset to create such a format. There don't seem to be any free tools to edit or convert to SVG Tiny format. The cheapest option around seems to be e-Picture Pro for $169. Inkscape has had some initiative to make it SVGT-compliant, but not much seems to be happening there lately. So the question in short is how do you create your icons for your Symbian apps (or other uses that require SVG Tiny)?

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• Encrypted usb stick not booting anymore how can I resolve the Disaster

  - by statquant

  Guys I am experiencing massive problem here. I created a bootable usb stick that I "full disk" encrypted with Ubuntu 13.04. I was using it when it froze. I had to reboot it manually and now I cannot boot on it anymore (It is not listed in the boot menu anymore) If I put when I run Ubuntu on my laptop ubuntu can see it and I am asked for a password But the correct password does not seem to work (I assume that this passphrase is the one I was using previously at startup) Can you please help me figure this thing out, this is massive problem to me...

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• My virtual server is created but it's not showing anything when I visit the site?

  - by web designer

  I have created a virtual sever as below for my site: I've specified the folder and domain name: And I created a master zone for the domain, and NS1 and NS2 has been set for the domain. everything seems good, but when I visit the domain I see the below page without some test files that I've put in the root(www directory): <VirtualHost *> DocumentRoot "/home/example.com/www" ServerName example.com <Directory "/home/example.com/www"> allow from all Options +Indexes </Directory> ServerAlias www.example.com </VirtualHost> What I'm doing' wrong?

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• Is programming or computer science in general, all about algorithms?

  - by wakandan

  As a grad student, I find it more and more common for prestigious companies (like Google, Facebook, Microsoft,...) to put algorithm questions in their test and interviews. A few startups I applied to also asked about algorithms. I wonder if algorithms fluency is the most important thing for software developer in those companies? If the answer being yes, what are the best method or resources for one to learn & practice about algorithms effectively? I can't seem to get interested in solving seemingly too complicated problems found in most textbook or websites. Though easily understand basic algorithms (like quicksort, bubblesort,...), I find it immensely difficult to remember and reuse them later. Thanks. P/S: If you ask me what I like, it's building good softwares to solve users' problems innovatively. I suppose that does not necessarily mean the software has to be very complicated.

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• Why do I get this error trying to compile libxml2?

  - by bfaskiplar

  Although, I installed libxml2 once and reinstalled it for a few times. I cannot compile c-source code because compiler cannot find where the header file is. I am able to locate where it is (in the folder where I downloaded the tar.gz package) but I had a feeling in my guts that this package isn't installed correctly because when I tried to sudo make install, it says /bin/bash: /home/bfaskiplar/Downloads/tar.gz: No such file or directory make[2]: *** [install-libLTLIBRARIES] Error 127 make[2]: Leaving directory `/home/bfaskiplar/Downloads/tar.gz packages/libxml2-2.8.0' make[1]: *** [install-am] Error 2 make[1]: Leaving directory `/home/bfaskiplar/Downloads/tar.gz packages/libxml2-2.8.0' make: *** [install-recursive] Error 1 that's why I installed synaptic package manager and reinstalled it, but in this case, isn't it supposed to put header files in default directory where gcc normally searches in currently, I am able to compile it with -I option, but I wonder why do I have to copy headers manually even if I used synaptic for installation and why I am getting Error 1 and Error 2 when trying to install the package manually. thanks in advance

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• Ubuntu 12.04 intermittently fails to wake up from sleep

  - by stacksia

  When I put my Ubuntu 12.04 machine into sleep, sometimes on waking up, it fails, logs me out, and takes me back to login screen. When I log back in, it tells me some unexpected error happened, but it fails to let me report the bug. This has started to happen recently, but I don't know what triggered it. uname -a Linux [name] 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 16:52:48 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux The issue seems similar to Xorg intermittently restarts after suspend. But in my case I am not sure if it is a Xorg issue. I looked at xorg logs, but didn't notice anything indicating an error. I know I am not providing a lot of info, but I am not sure where (e.g. which log files) I should seek for more info.

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• At what point asynchronous reading of disk I/O is more efficient than synchronous?

  - by blesh

  Assuming there is some bit of code that reads files for multiple consumers, and the files are of any arbitrary size: At what size does it become more efficient to read the file asynchronously? Or to put it another way, how small must a file be for it to be faster just to read it synchronously? I've noticed (and perhaps I'm incorrect) that when reading very small files, it takes longer to read them asynchronously than synchronously (in particular with .NET). I'm assuming this has to do with set up time for things like I/O Completion Ports, threads, etc. Is there any rule of thumb to help out here? Or is it dependent on the system and the environment?

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• How to morph from a programmer noob to a guru?

  - by didxga

  I have been a programmer for two years, and i am getting hard to level up my skill especially working at legacy code maintenance right now. I think working hard is not enough to elevate my skill, because there are ton of opensource around us, the preoject i have been involved are all mixture of opensources --- from front end to back end from presentation tier to business logic tier. My work is just gluing all these together or something fewer complex which is to collect data from UI to logic module then retrieve the data processed and put it to UI. Sometime there is a need to add some simple logic(like assembling the data to a form that fit business logic interface) while transport data. Could you please give me any suggestion what should i do on the side to improve my skill? Thanks!

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• VMWare Unity Mode with Ubunty 12.10

  - by Nick

  This is a very difficult thing to search for, and find an answer to because of the unfortunate choice VMWare and Ubuntu both having something called "Unity". My host operating system is Windows 7 - 64 bit, running VMWare Workstation 9.0.1. I have a virtual machine running Ubuntu 12.10 - 64 bit. When I attempt to put VMWare in "Unity mode", I get the following message: The virtual machine cannot enter Unity mode because: - Unity is not supported on the guest operating system. From the VMWare site, there is nothing listed that says that Ubuntu is not supported for this... and I have installed the latest vmware-tools on the guest operating system. It seems like a lot of people have had this issue, but I haven't seen a good resolution to it yet. Does anyone know how to get Unity mode working with Ubuntu?

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• Installing Ubuntu 13.10 'Saucy Salamander' on L75D-A7280 hangs on a black screen

  - by Riven

  Trying to get Ubuntu 13.10 to work and it will not. Seen that somebody is having a similar problem, some things failing then it just hangs on a black screen (after pressing F1 to see what it's doing). My system is a Toshiba Satellite L75D-A7280, and I have tried two different files that I had downloaded from Ubuntu.com with no luck. My laptop came with Windows 8 and following the dual-boot directions Ubuntu 12.04 was installed and worked perfect, except for completely obliterating Windows 8 and voiding my warranty, meaning neither Toshiba nor the retail center I bought my system from can help me legally, besides giving advice... nor can I return it to get a non-UEFI based system. I really need to figure this out, I am a student and need my laptop working properly with any OS I put on it. Will continue searching for any information I can find.

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• PC won't boot up after installing 11.10

  - by bakhshu

  I have a HP/Compaq s1010z (AMD64) desktop and installed 11.10 from a CD (using the entire disk). So it formatted the entire drive, went through installation and then it ejected the CD and asked me to click the Restart button, which I did. It rebooted fine the first time, but any time thereafter, it fails. Meaning, after the initial BIOS screen, the monitor seems to be stuck in limbo with a text cursor blinking on the top left corner, as if it can't find anything to boot from. At first I tried reinstalling (reformat entire drive again) - no improvement. Then I did an in-place re-installation (leave home dirs in place, just redo the OS), nothing there either. Then I put in the 11.04 CD, changed the boot order to CD first, and got the CD menu, chose 'Boot from first hard disk' and it booted fine. The problem is that I can't boot without the 11.04 CD, how ironic! Any ideas?

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• Ubuntu 12.04 USB (HP)

  - by xShadoWolf

  I have put ubuntu 12.04 on a USB (Kingston 8GB) and I go to install and I can't it gives options for erase and something else I have 4 primary partitions win7 for my main partition and 3 created by HP HP_TOOLS, HP_RECOVERY and SYSTEM To get to my point how do I install ubuntu on HDD I have a HP probook 200 notebook PC. Can I remove any partitions? When I do sudo fdisk -l This Comes Up Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x3ed7e7b0 Device Boot Start End Blocks Id System /dev/sda1 * 2048 409599 203776 7 HPFS/NTFS/exFAT /dev/sda2 409600 946591743 473091072 7 HPFS/NTFS/exFAT /dev/sda3 946591744 976560127 14984192 7 HPFS/NTFS/exFAT /dev/sda4 976560128 976771119 105496 c W95 FAT32 (LBA) Disk /dev/sdb: 7803 MB, 7803174912 bytes 122 heads, 58 sectors/track, 2153 cylinders, total 15240576 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xc3072e18 Device Boot Start End Blocks Id System /dev/sdb1 * 8064 15240575 7616256 c W95 FAT32 (LBA)

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• Gone in 60 Seconds: An Insecure Database is an Easy Target

  - by Troy Kitch

  According to the recent Verizon Data Breach Investigations Report, 98% of breached data originates from database servers and nearly half are compromised in less than a minute! Almost all victims are not even aware of a breach until a third party notifies them and nearly all breaches could have been avoided through the use of basic controls. Join us for this November 28th webcast to learn more about the evolving threats to databases that have resulted in over 1 billion stolen records. Also, hear how organizations can mitigate risks by adopting a defense-in-depth strategy that focuses on basic controls to secure data at the source - the database. There's no turning back the clock on stolen data, but you can put in place controls to ensure your organization won't be the next headline. Note, this webcast will be recorded for on-demand access after November 28th. 

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• Where to find current information on quality of released games as software products?

  - by Tom

  As a gamer, one thing I have learned I need to be savvy about is knowing whether SomeBigGame is actually unstable or otherwise problematic as a piece of software (riddled with invasive DRM products, only runs well on a particular video driver version, crashes on non-English-language systems, etc.). I know that game news media can sometimes be relied upon to report on some problems, but I doubt they bother to cover smaller or indie titles. An example: I've started playing Transformice on Kongregate, and I'm considering installing the downloadable client (it is an online multiplayer game). The part of me that cares about data privacy and maintaining a clean-and-healthy PC wants to know whether there is a place I can check to find out more about a title-as-software than "it is not a literal virus." Put another way: where would you not want to see your game receive lots of attention?

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