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• Removal of libsound2 file causes graphics loss

  - by Sajid Ahmad

  I was trying to install skype on ubuntu 12.10 desktop. but it was giving some error related to libsound2:i386 file. to overcome this problem i removed file libsound2 thinking that will install it later. but it removes all the graphics from my system. after removal of the file system started to give error that system is running in low graphics mode. I tried to install libsound2 file again but couldn't. After it i have upgraded the release of my ubuntu version using command do-release-upgrade think that it will install the missing file. But still there are no graphics on the system. I am using Dell Inspiron 15 . Please help me to tell that how can i get the graphics of system back.

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• Ray Tracing Shadows in deferred rendering

  - by Grieverheart

  Recently I have programmed a raytracer for fun and found it beutifully simple how shadows are created compared to a rasterizer. Now, I couldn't help but I think if it would be possible to implement somthing similar for ray tracing of shadows in a deferred renderer. The way I though this could work is after drawing to the gbuffer, in a separate pass and for each pixel to calculate rays to the lights and draw them as lines of unique color together with the geometry (with color 0). The lines will be cut-off if there is occlusion and this fact could be used in a fragment shader to calculate which rays are occluded. I guess there must be something I'm missing, for example I'm not sure how the fragment shader could save the occlusion results for each ray so that they are available for pixel at the ray's origin. Has this method been tried before, is it possible to implement it as I described and if yes what would be the drawbacks in performance of calculating shadows this way?

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• Spring MVC vs raw servlets and template engine?

  - by Gigatron

  I've read numerous articles about the Spring MVC framework, and I still can't see the benefits of using it. It looks like writing even a simple application with it requires creating a big hodgepodge of XML files and annotations and other reams of code to conform to what the framework wants, a whole bunch of moving parts to accomplish a simple single task. Any time I look at a Spring example, I can see how I can write something with the same functionality using a simple servlet and template engine (e.g. FreeMarker, StringTemplate), in half the lines of code and little or no XML files and other artifacts. Just grab the data from the session and request, call the application domain objects if necessary, pass the results to the template engine to generate the resulting web page, done. What am I missing? Can you describe even one example of something that is actually made simpler with Spring than using a combination of raw servlets with a template engine? Or is Spring MVC just one of those overly complicated things that people use only because their boss tells them to use it?

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• Robots.txt never downloaded but some blocked URLs in GWT

  - by Zistoloen

  There is something I don't understand in Google Webmaster Tools (GWT) for my Wordpress site. In menu "Blocked URLs", it mention that my robots.txt has never been downloaded but there are some blocked URLs. It's kind of weird and not logical. Am i missing something? User-agent : * Disallow: /*? Disallow: /wp-login.php Disallow: /wp-admin Disallow: /wp-includes Disallow: /wp-content Allow: /wp-content/uploads Disallow: */trackback Disallow: /*/feed Disallow: /*/comments Disallow: /cgi-bin Disallow: /*.php$ Disallow: /*.inc$ Disallow: /*.gz$ Disallow: /*.cgi$ Disallow: /author/* I'm afraid my robots.txt doesn't block several URLs I want to block.

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• Pix for visual studio express 2012 (Desktop)

  - by JohnB

  (Originally asked on stackoverflow) Using visual c++ express 2010 for direct3d you have to download the directX sdk and there is a tool called pix for debugging shaders, looking at 3d resources etc. With visual studio 2012 express the directx sdk is included in the windows sdk that comes with it but this does not seem to include the winpix.exe tool. Is this very useful tool still available? I guess I can still use the one from the previous sdk but it seems wrong to install the entire sdk just for that tool. Is there a version for VS2012 express that I'm missing?

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• How to properly set up a network bridge using bridge-utils using wlan0 as the internet "source"?

  - by Miguel Azevedo

  Hey everyone this is my first post so go easy on me. I currently have a laptop with Ubuntu Studio 12.04 Beta 2 that is supplying a wireless internet connection to a windows 7 desktop computer that's connected directly to the laptop through Ethernet. I'm using the "shared to other computers" method in network manager but I believe it doesn't work with what I want to do. I would like to have the windows computer on the same subnet as every other computer in my house (192.168.1.x) so I can use LAN applications (MIDI over WiFi, Bonjour etc.) on the windows computer without having to run a massive cable to the router. I've been googling endlessly and tried multiple configurations in the /etc/network/interfaces file without success. All of them would report "cannot add wlan0 to bridge" Is there a specific way to make this work? What am I missing? Thank you

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• Smooth animation in Cocos2d for iOS

  - by MrDatabase

  I move a simple CCSprite around the screen of an iOS device using this code: [self schedule:@selector(update:) interval:0.0167]; - (void) update:(ccTime) delta { CGPoint currPos = self.position; currPos.x += xVelocity; currPos.y += yVelocity; self.position = currPos; } This works however the animation is not smooth. How can I improve the smoothness of my animation? My scene is exceedingly simple (just has one full-screen CCSprite with a background image and a relatively small CCSprite that moves slowly). I've logged the ccTime delta and it's not consistent (it's almost always greater than my specified interval of 0.0167... sometimes up to a factor of 4x). I've considered tailoring the motion in the update method to the delta time (larger delta = larger movement etc). However given the simplicity of my scene it's seems there's a better way (and something basic that I'm probably missing).

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• How to make pulseaudio work again?

  - by Pawel M.

  I was having problems with sound (mono only output), so following advice from another askubuntu question I made some edits in /etc/pulse/default.pa After rebooting I had no sound at all. So I deleted /etc/pulse/default.pa entirely and tried another reboot. I did not backup the file (stupid, I know). How to come back to working config? edit: I tried: sudo apt-get remove pulseaudio (reboot) sudo apt-get install pulseaudio (reboot) It's still not working. The file /etc/pulse/default.pa is missing. Here's what pulseaudio and pacmd commands show: $ pulseaudio E: [pulseaudio] main.c: Daemon startup without any loaded modules, refusing to work. $ pacmd No PulseAudio daemon running, or not running as session daemon.

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• Why are 2 Adobe Flash Plugin on USC (Ubuntu Software Center)?

  - by LuC1F3R

  As you know in Ubuntu Software Center is 2 times Adobe Flash Plugin. One is called Adobe Flash Plugin and other Adobe Flash Plugin 10. Which of the two to install? Or rather it is the recommended installation methods? If we think well, we can install the Adobe Flash plugin for Firefox from the notification date (Install missing plugin) or walking on the Adobe website and downloading the package .deb. After all, how to properly install Flash Player on Linux Ubuntu? (But my biggg question is why are 2 Adobe Flash Plugin on USC? ...for what? If you click on "More Info", the description are the same for both)

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• Ubuntu 12.04.1 LTS USB not being detected after formatting with Startup Disk Creator

  - by Zach

  sudo fdisk -l lists the drive, however, I cannot find it in the file explorer. Disk /dev/sda: 250.1 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders, total 488397168 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: 0x000d871e Device Boot Start End Blocks Id System /dev/sda1 * 2048 486322175 243160064 83 Linux /dev/sda2 486324222 488396799 1036289 5 Extended /dev/sda5 486324224 488396799 1036288 82 Linux swap / Solaris Disk /dev/sdb: 8195 MB, 8195480064 bytes 253 heads, 62 sectors/track, 1020 cylinders, total 16006797 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: 0x00027ae4 Device Boot Start End Blocks Id System /dev/sdb1 * 62 15999719 M 7999829 c W95 FAT32 (LBA) Manually mounting it produces this error message :~$ sudo mount -t vfat /dev/sdb1 /media/external -ouiduid=1000,gid=1000,utf8,dmask=027,fmask=137 mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so Is the usb toast?

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• Thunar not showing thumbnails in Openbox

  - by RanRag

  I am using openbox 3.5 and my file manager of choice is Thunar but the problem I am facing is thunar not showing thumbnails for folder,video files etc. My Thunar: You can see in the above image that thunar is not showing thumbnails for folders, files but it is showing for pdf and similar is the case for video files no thumbnails. So, what is wrong here am I missing some basic thunar config files. ranrag@ranrag:~$ echo $DESKTOP_SESSION openbox I looked into some forums and they mentioned that there is some dependency of tumbler with thunar but I have latest version of tumbler installed on my system. PS: I already tried thunar preferences but still no luck.

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• Compiz stop working

  - by Aikanáro

  I'm on a laptop sony vaio, vng-nw330f with ubuntu 11.10. One day I used my computer normally, I shutdown and the other day when I turn on it again, all was different. Compiz effects is not working at all, it doesn't matter what plugin (from ccsm) i enable or disable, nothings happens, nothings changes. I tried next commands: unity --reset unity --reset-icons sudo rm -rf .config .gnome .gnome2 .gnome2_private .compiz .icons .fonts .nautilus .themes .qt .local (from my home directory) gconftool-2 --recursive-unset /apps/compiz-1 I try reinstalling compiz (I remove compiz from software center and installed it again). I have just a couple of weeks using ubuntu, I'm not sure if exist a desktop call it unity 3d, but I think that it's missing. I want the graphics interface of ubuntu 11.10 by default.

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• adobe flash not working firefox or chromium

  - by user215216

  I'm new to ubuntu but I think I did everything right. Adobe flash says its installed and I've uploaded the latest Firefox and Chromium. When I go to youtube all I see is a black screen where the video should be and no image, Same in chromium, but at least chromium says it can't load plugin. Have tried various fixes on this web site but to no avail. Have to be doing something wrong or missing some step while quietly going crazy. Can someone please help me?

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• What programming languages have you taught your children?

  - by Dubmun

  I'm a C# developer by trade but have had exposure to many languages (including Java, C++, and multiple scripting languages) over the course of my education and career. Since I code in the MS world for work I am most familiar with their stack and so I was excited when Small Basic was announced. I immediately started teaching my oldest to program in it but felt that something was missing from the experience. Being able to look up every command with the IDE's intellisense seemed to take something from the experience. Sure, it was easy to grasp but I found myself thinking that a little more challenge might be in order. I'm looking for something better and I would like to hear your experiences with teaching your children to program in whatever language you have chosen to do so in. What did you like and dislike? How fast did they pick it up? Were they challenged? Frustrated? Thank you very much!

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• How to config multiple monitor with optimus?

  - by irrational

  I have an Acer Aspire 8951G running 12.04 Pangolin with bumblebee working beautifully. My problem is that when I connect either the VGA port or the HDMI to my projector there is no way I can see to properly set up the resolutions or colours. The default basic display driver sees the projector correctly, but messes up colours and resolutions (on hdmi) and resolutions on VGA. (Its a 1280 X 720 projector) Am I missing some sort of Xorg configuration? nvidia-xconfig does not seem to exist and running optirun nvidia-settings -c :8 opens the settings, but of course only for the one display. I just want a way to set a default config for my projector via VGA or preferably HDMI. Any help would be wonderful.

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• Is Java free/open source or it isn't?

  - by user1598390

  On November 13, 2006, Sun released much of Java as free and open source software, (FOSS), under the terms of the GNU General Public License (GPL). On May 8, 2007, Sun finished the process, making all of Java's core code available under free software/open-source distribution terms, aside from a small portion of code to which Sun did not hold the copyright. OpenJDK (Open Java Development Kit) is a free and open source implementation of the Java programming language. It is the result of an effort Sun Microsystems began in 2006. The implementation is licensed under the GNU General Public License (GNU GPL) with a linking exception. Why there are still people that say Java is not open source or free as in free speech ? Am I missing something? Is Java still privative ?

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• PDF files made using inkscape doesnot show everything when opened in windows

  - by Manu P Nair

  I made a small vector graphic using inkscape, converted it to pdf. Then i opened the pdf in windows for printing purposes. Many of the lines and curves I made in inkscape were missing. Then I tried the same graphics in coreldraw. Converted it to pdf. Then i opened the file in ubuntu. All lines and curves were there. I want to use ubuntu for all my works. But this problem makes it difficult for me as I have to take the pdf to a printer who works only with windows.

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• unable to add/remove program in Ubuntu 12.04 LTS?

  - by Manish Kumar Chauhan

  ** my problem is as following: unable to add/remove any program using either update-manager or Synaptic Package Manager or terminal update-manager is asking for partial upgrade and while updating software-center 5.6.2 catalog , there is no progress beyond the line "this is may take a moment" synaptic is unable to obtain an exclusive lock, similarly can't do terminal command sudo apt-get update if i try to break down the lock using the command sudo fuser -cuk /var/lib/dpkg/lock; sudo rm -f /var/lib/dpkg/lock it turns off my monitor display and i have to restart the whole system. note: this whole trouble started ,when i found ubuntu software-center missing after adding a repository and reinstalled it. **

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• Unable to mount external hard drive

  - by arranjamesroche

  Basically I my 12.10 update crashed halfway through, so I've had to start again and put all my data onto an external HDD. It was all going fine until this came up : Error mounting /dev/sdb1 at /media/amy/CA47-8339: Command-line `mount -t "vfat" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,shortname=mixed,dmask=0077,utf8=1,showexec,flush" "/dev/sdb1" "/media/amy/CA47-8339"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so When I tried to restore my info off the HDD. Now I'm stuck completely clueless as to how I'll get anything off the hard drive.

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• Failed update of Ubuntu 10.10 results in unbootable system

  - by chessweb

  Hi, yesterday I performed an automatic security update suggested by the update manager on my virtualized (with VirtualBox on a Windows 7 host) Ubuntu 10.10 installation. The update somehow failed and left me with an unbootable system. When I try to boot, I am told that various folders, files, and what not are missing. Then the system drops into a busybox and leaves me with an (initramfs) prompt. This happens with all kernels I get offered by GRUB, although the error messages are quite different from kernel to kernel. Well, the short of it is this: I don't have the slightest idea on how to get back to a working system and this site is the final straw I'm willing to grab. A complete disaster like this following an update initiated and executed by the system is unheard of in Windows-land; at least I haven't heard of it, yet, and therefore I am going to abandon Ubuntu and Linux altogeteher, if there is no remedy. Regards, RSel

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• Problems with brother printer drivers on 64bit 12.04

  - by Jeff Klein

  I'm running 12.04 64bit on a toshiba satellite laptop. I have a Brotrher MFC-J825dw printer. I've installed brothers driver for it and the cupswrapper but it won't print. I says it is receiving data but it never shows up in the queue. I've also tried the text only generic driver and the same thing happens. I think some dependencies are missing for the cups wrapper and when I try to find it it says it can't be installed. Nopt sure if that's the problem because it doesn't explain the generic driver failure. In any case, any ideas?

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• How do functional languages handle random numbers?

  - by Electric Coffee

  What I mean about that is that in nearly every tutorial I've read about functional languages, is that one of the great things about functions, is that if you call a function with the same parameters twice, you'll always end up with the same result. How on earth do you then make a function that takes a seed as a parameter, and then returns a random number based on that seed? I mean this would seem to go against one of the things that are so good about functions, right? Or am I completely missing something here?

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• Unity3D - Projection matrix camera frustum

  - by MulletDevil

  I've used off centre projection to create a custom projection matrix for my camera. When I run the game I can see the scene correctly in the game view but in the editor view the camera frustum is not correct. It still shows the original frustum shape not the new one. It also appears that Unity is using the original frustum for frustum culling and not the new one as I can see object being culled which are visible to the new frustum but would not be visible in the old one. Am I wrong in thinking that a custom projection matrix would alter the view frustum? Or am I missing something else?

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• cannot rename files when saving

  - by Botond Vajna

  I am using xubuntu 13.10. Since the last update, when I am saving files I cannot rename other files, there are missing buttons in context menu like rename, cut, copy, etc... let`s say I edited the file named style.css in firefox, and I want to save it, but i do not want to overwrite the original, I want to rename the original for ex: style_orig.css and save the edited file with the name style.css. for doing that I must open thunar, navigate to that file, and rename it, after that, I can save the file from firefox. let`s reformulate this question: if I want to overwrite a file, but preserve the original, then I must make a copy of the original. Well, I can not do this when saving the file from the application, I must open thunar and navigate to that file which is an additional task I have to do. It`s a waste of time.

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• Got back Hibernation option, but cannot resume from Hibernate

  - by harisibrahimkv

  In my Ubuntu 12.04, the hibernation option was working well and fine. However, I installed Debian on another partition recently and when I again tried to boot to Ubuntu, I got a message on the boot splash screen saying : The disk drive for / is not ready yet or not present. Continue to wait; or press s to skip mounting or M for manual recovery. After logging into Ubuntu, I find that my hibernation option has gone missing. Is there anyway to recover the hibernation option? EDIT: I solved the disk drive problem and I got the hibernation option back. When I did "sudo pm-hibernate", my system went to hibernation. However, when powering on again, it booted up normally and thus there was no effect of hibernation. How can this be rectified? EDIT1: System - Lenovo ideapad s10-2. EDIT2: /etc/fstab

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