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Articles indexed Wednesday November 7 2012

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• Cant boot ubuntu 12.10 from LiveCD

  - by user106316

  I had ubuntu installed for a few weeks now untill it had a kernel update and i canceled the wifi driver because it didnt worked, since then i wasent able to boot into ubuntu. I tryed to boot from livecd but it didnt worked either. I was able to succssecfuly install windows 7 64 bit now and also format my hard drive but i dont like windows and when i tryed to install ubunru again to still didnt worked. Please help me! Thanks :)

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• "Failed to fetch" while updating

  - by Farouk BA

  I'm trying to update from ubuntu 12.10 lately but I keep getting the "Failed to fetch" error. W: Failed to fetch ht tp://security.ubuntu.com/ubuntu/dists/quantal-security/Release Unable to find expected entry 'independent/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch ht tp://archive.ubuntu.com/ubuntu/dists/quantal/Release Unable to find expected entry 'independent/source/Sources' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch ht tp://archive.ubuntu.com/ubuntu/dists/quantal-updates/Release Unable to find expected entry 'independent/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch ht tp://archive.ubuntu.com/ubuntu/dists/quantal-backports/Release Unable to find expected entry 'independent/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file) E: Some index files failed to download. They have been ignored, or old ones used instead. I changed the server and deleted the source lists from /var/lib/apt/lists/ like some answers say but still. This is really annoiying.

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• Second Monitor Unable to Display at any Resolution

  - by Ryan Sharp

  After connecting the second monitor, the only way to get it to work is with 'mirror', which isn't what I want it for. If I select a display resolution for it, I get the following error: requested position/size for CRTC 148 is outside the allowed limit: position=(1908, 0), size=(1024, 768), maximum=(1920, 1920) I'm on 12.04, with AMD HD Radeon 6950, Post-update drivers. I appreciate anybodies help with this. Thanks.

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• Screen rendering problems after upgrading to 12.10

  - by vjrj

  Since upgrading to Ubuntu 12.10 I'm suffering severe rendering issues in unity: Some parts of any application (for instance Firefox, or emacs, etc) are blank, or are not rendered, or are blinking. Some fonts in an application are not correct rendered, maybe only some part (see Eclipse screenshot). There is some shadows in desktop background. It's something that occurs from time to time (it's works great for hours and suddenly start to give this rendering problems). I was trying to find a bug in launchpad but without success. My card (using i915 module): 00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0042] (rev 02) I've tried to reset compiz/unity or gnome but does not help. Any tip? Update: A Firefox screenshot of how my profile in Ask Ubuntu looks like now

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• Problem opening .sh file

  - by Lautré

  I'm trying to install Torchlight from the Humble Indie Bundle 6. The installation file is an sh file. When I try to run the sh file I get this output. [ user@pc:~/Desktop$ sudo sh ./Torchlight-2012-09-26.sh [sudo] password for user: Current temporary directory (usually /tmp by default) does not seem to be executable! Please specify an alternative path by using the --target option.] How do make the tmp dir executable or specify an alternate path? I'm running ubuntu 12.10

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• Ubuntu 12.10 won't display properly after kernel upgrade

  - by Daniel

  After updating a system today, Ubuntu's doesn't display correctly. The desktop now looks like this. It was working properly before. I had to use the terminal to run synaptic package manager, so I could view the update history; which is as follows: Commit Log for Wed Nov 7 11:50:36 2012 Upgraded the following packages: linux-image-generic (3.5.0.17.19) to 3.5.0.18.21 Installed the following packages: linux-image-3.5.0-18-generic (3.5.0-18.29) linux-image-extra-3.5.0-18-generic (3.5.0-18.29) Prior to this issue, the last active driver was nvidia-current-updates, version 304.51. I tried using the nvidia-current driver, version 304.51.really.304.43 instead, but the problem persists. I tried running nvidia-settings from terminal, so I could try configuring something, but the application informs that the Nvidia driver is not being used. As the x-swat repository has nothing for Quantal, I desperately used the unstable x-edgers repository & upgraded, but to no avail; so I purged it. The display should normally be full HD, but the only available resolutions now are 1024x768(4:3) and 800x600(4:3). The system is Dell XPS-L702X, with NVIDIA GeForce GT 555M, and 17" screen. How can I fix this problem? Update: I tried using the Nouveau third-party driver & this fixes the issue. However, if you have any idea how to get the Nvidia drivers working properly with the latest kernel, please share; as I've noticed some videos playing very slowly on the system, though I'm not sure exactly why.

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• Bluetooth not finding any devices on 12.10

  - by DeanGrobler

  When I switch on my bluetooth and search for devices my laptop doesn't find any even though there's plenty in the area. Most likely this is because of drivers that are missing. So what I want to know is if there's a way I can view the exact details of what bluetooth device I have built into my laptop so I can start searching for a linux version of the needed driver. Any tips? PS - Running 64bit 12.10

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• From where can I install my nVidia drivers? [closed]

  - by Arthur Wulf White

  Possible Duplicate: How do I install extra drivers? Additional Drivers tool in Ubuntu 12.10? I have read here and here that I should be able to install drivers. So I'm finding the Additional Drivers menu. To install nVidia driver. I started looking for System -> Administration and not finding it. I have an icon that says System Settings and it has any option related to drivers. NOTE: I am using Ubuntu 12.10.

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• NetworkManager not populating resolv.conf

  - by Cerin

  I recently upgraded from 11.10 to 12.04, and now NetworkManager isn't populating /etc/resolv.conf when connecting to wireless networks, when it had been working perfectly in 11.10. I'm not seeing any explicit errors in either the NM UI or in syslog. How do I diagnose what's wrong? Edit: If I try to run resolvconf, I get the error "resolvconf: Error: /etc/resolv.conf isn't a symlink, not doing anything." What should it be a symlink to and/or how do I get NM to populate it? This says the symlink should point to /run/resolvconf/resolv.conf, but that file does not exist on my system.

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• Trouble setting up openVPN/VPN

  - by kkiller23

  I'm having trouble setting up a VPN on my VPS that's running Ubuntu 11.04. I'm been following this guide http://tipupdate.com/how-to-install-openvpn-on-ubuntu-vps/ I'm able to start the VPN, but the command it tell's me to do after I start the VPN doesn't work for me. I've tried it about 5 different way's and i'll show you what i get now. :~# iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT iptables: No chain/target/match by that name. :~# iptables -A FORWARD state --state RELATED,ESTABLISHED -j ACCEPT Bad argument `state' Try `iptables -h' or 'iptables --help' for more information. I just can't get that to work and the VPN doesn't seem to be workign with out it. Can someone help me fix this?

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• Domain appears taken when searched from a different host, but whois says 'No match'

  - by Nanda

  I have recently registered a new .name domain. It is just myfirstname.name, something like nanda.name. My debit card has been billed, but my domain control panel doesn't show any information regarding the new domain. I have raised a ticket with their support and there is no response yet. It's been 3 days. I checked some other registrars and almost all of them say that nanda.name is taken, but when I search whois either from my command line or the numerous whois web services, I get No match as answer each time. What gives? PS : I should add that this registrar's support is known to suck, which, by the time I found, is a bit late.

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• SmS Gateways - How do other sites do it? [closed]

  - by chobo2

  Possible Duplicate: Send and Receive SMS from my Website I would love to have a feature on my site that sends Email reminders and SmS(text messages) to people mobile phones. I been searching around and all I am finding is api's that charge money per SmS message(as low as 1cent per message). However even at 1cent per message that is still too much. The amount of money I am charging per year could be servilely eroded by just the Sms messages along. I could of course charge more money for my service or have an add on for SmS messages but I don't think either would work as most people expect it to be free feature and if they have to pay anything that is because of their carrier charging them not the website. How do other sites do it? I guessing companies like google have their own gateway providers or something like that. But how about smaller sites what do they do? I can't see them paying per sms text message.

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• Can a whitespace regex character be used to perform a javascript injection? [migrated]

  - by webose

  if I want to validate the input of a <textarea>, and want it to contain, for example, only numerical values, but even want to give users the possibility to insert new lines, I can selected wanted characters with a javascript regex that includes even the whitespace characters. /[0-9\s]/ The question is: do a whitecharacter can be used to perform injections, XSS,even if I think this last option is impossible, or any other type of attack ? thanks

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• Website (X)HTML Code Change Detection [closed]

  - by 0pt1m1z3

  I am looking for an enterprise-grade service or a tool that can be used to scan / fingerprint websites and notify when major XHTML code changes are detected. The tool should be able to continuously scan thousands of websites and determine the percentage of HTML code that has been modified since the last run. And then either save the data where it can be easily accessed or send periodic notifications. I know of services like ChangeDetect.com, but they don't do markup only changes and instead focus on everything, including content. We don't really care about presentation content, because a lot of sites we need to cover are updated frequently with content.

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• How to Handle frame rates and synchronizing screen repaints

  - by David Kroukamp

  I would first off say sorry if the title is worded incorrectly. Okay now let me give the scenario I'm creating a 2 player fighting game, An average battle will include a Map (moving/still) and 2 characters (which are rendered by redrawing a varying amount of sprites one after the other). Now at the moment I have a single game loop limiting me to a set number of frames per second (using Java): Timer timer = new Timer(0, new AbstractAction() { @Override public void actionPerformed(ActionEvent e) { long beginTime; //The time when the cycle begun long timeDiff; //The time it took for the cycle to execute int sleepTime; //ms to sleep (< 0 if we're behind) int fps = 1000 / 40; beginTime = System.nanoTime() / 1000000; //execute loop to update check collisions and draw gameLoop(); //Calculate how long did the cycle take timeDiff = System.nanoTime() / 1000000 - beginTime; //Calculate sleep time sleepTime = fps - (int) (timeDiff); if (sleepTime > 0) {//If sleepTime > 0 we're OK ((Timer)e.getSource()).setDelay(sleepTime); } } }); timer.start(); in gameLoop() characters are drawn to the screen ( a character holds an array of images which consists of their current sprites) every gameLoop() call will change the characters current sprite to the next and loop if the end is reached. But as you can imagine if a sprite is only 3 images in length than calling gameLoop() 40 times will cause the characters movement to be drawn 40/3=13 times. This causes a few minor anomilies in the sprited for some charcters So my question is how would I go about delivering a set amount of frames per second in when I have 2 characters on screen with varying amount of sprites?

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• writing an autopilot for a 2d game with newtonian physics

  - by Jargo

  The subject says it all. I am making a 2d space game with newtonian physics and I need pointers on how to write an autopilot for it. The requirements are best explained by an example. There is a target object which has speed- and position-vectors and there a spaceship that is controlled by the autopilot. This spaceship also have speed, position and maximum acceleration. The autopilot needs to control the ship that it either collides with the target, Or intercepts the target so that the ship has matching speed and position with the target. Could someone give me some pointers how to achieve this behavior or perhaps even an ready implementation? I am sure someone has written something like this before and there is no point in reinventing the wheel.

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• More Efficient Data Structure for Large Layered Tile Map

  - by Stupac

  It seems like the popular method is to break the map up into regions and load them as needed, my problem is that in my game there are many AI entities other than the player out performing actions in virtually all the regions of the map. Let's just say I have a 5000x5000 map, when I use a 2D array of byte's to render it my game uses around 17 MB of memory, as soon as I change that data structure to a my own defined MapCell class (which only contains a single field: byte terrain) my game's memory consumption rockets up to 400+ MB. I plan on adding layering, so an array of byte's won't cut it and I figure I'd need to add a List of some sort to the MapCell class to provide objects in the layers. I'm only rendering tiles that are on screen, but I need the rest of the map to be represented in memory since it is constantly used in Update. So my question is, how can I reduce the memory consumption of my map while still maintaining the above requirements? Thank you for your time! Here's a few snippets my C# code in XNA4: public static void LoadMapData() { // Test map generations int xSize = 5000; int ySize = 5000; MapCell[,] map = new MapCell[xSize,ySize]; //byte[,] map = new byte[xSize, ySize]; Terrain[] terrains = new Terrain[4]; terrains[0] = grass; terrains[1] = dirt; terrains[2] = rock; terrains[3] = water; Random random = new Random(); for(int x = 0; x < xSize; x++) { for(int y = 0; y < ySize; y++) { //map[x,y] = new MapCell(terrains[random.Next(4)]); map[x,y] = new MapCell((byte)random.Next(4)); //map[x, y] = (byte)random.Next(4); } } testMap = new TileMap(map, xSize, ySize); // End test map setup currentMap = testMap; } public class MapCell { //public TerrainType terrain; public byte terrain; public MapCell(byte itsTerrain) { terrain = itsTerrain; } // the type of terrain this cell is treated as /*public Terrain terrain { get; set; } public MapCell(Terrain itsTerrain) { terrain = itsTerrain; }*/ }

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