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• Should I Adjust the Volume by Software or Hardware?

  - by Jason Fitzpatrick

  You can adjust the your speaker volume in-app, operating system-wide, or by the physical controls on your speaker setup. Which method is best for optimum sound? 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. Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus?

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• OpenVPN fails to start automatically

  - by Kaushal Shriyan

  Hi, I have two openvpn site configs. I have configured openvpn in daemon mode and it needs to be restarted automatically while bootup. I am always faced with the situation below. and then i need to restart it manually. Dec 27 16:24:26 kaushal-laptop ovpn-sjc2[1287]: script failed: external program exited with error status: 1 Dec 27 16:24:26 kaushal-laptop ovpn-sjc2[1287]: Exiting Please suggest/guide Thanks

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• Nvidia GT218 repository drivers don't work

  - by user1042840

  I upgraded all packages with sudo apt-get upgrade command on my Ubuntu 10.04 box and I have Ubuntu 12.04 3.2.0-29-generic-pae now. I have two monitors and the following GPU: 01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [NVS 300] (rev a2) After upgrading to 12.04, I somehow lost my previous setup with one common workspace stretched across two monitors. When Ubuntu starts only one monitor is on. I can see the message on the active monitor: Not optimum mode. Recommended mode: 1680x1050 60Hz I used Nvidia proprietary drivers on 10.04 but now jockey-text --list shows: xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Disabled, Not in use) xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Enabled, Not in use) When I run sudo nvidia-settings it says You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run `nvidia-xconfig` as root), and restart the X server.' I typed nvidia-xconfig and rebooted, but jockey-text --list says the same after the reboot: Not in use. The same with nvidia-current - Enabled but Not in use. I also tried nvidia-173 but I ended up in tty immediately at startup so I removed it. I used to have some problems with Nvidia proprietary drivers on 10.04, I had to put paths to EDID files in /etc/X11/xorg.conf explicitly, but the resolution was as recommended and both monitors were working. If I understand correctly, nouveau drivers are used now by default because the resolution is still quite high, definitely not 800x600, xrandr showed: xrandr: Failed to get size of gamma for output default Screen 0: minimum 320 x 400, current 1600 x 1200, maximum 1600 x 1200 default connected 1600x1200+0+0 0mm x 0mm 1600x1200 66.0* 1280x1024 76.0 1024x768 76.0 800x600 73.0 640x480 73.0 640x400 0.0 320x400 0.0 1680x1050_60.00 (0x4f) 146.2MHz h: width 1680 start 1784 end 1960 total 2240 skew 0 clock 65.3KHz v: height 1050 start 1053 end 1059 total 1089 clock 60.0Hz However, colors seem a bit faded and blurry with nouveau drivers. Mouse cursor is invisible if it's placed inside Firefox window, and only one monitor is working. I like open source and if it's possible I'd prefer to use nouveau drivers but a few things should be fixed. I'm curious why nvidia-current drivers from the repository don't work now. I read it has something to do with the new X11 server in Ubuntu 12.04, is it true? How can I get it back to work?

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• the unity aspect ratio script looks good in computer but not in android phones

  - by Pooya Fayyaz

  I'm developing a game for android devices.and i have a script that solve the ratio problem but i have a problem in this code.and i dont know why.it looks perfect in computer even resize the game screen but in mobile phones have a problem.my game runs in landscape mode.this is the script : using UnityEngine; using System.Collections; using System.Collections.Generic; public class reso : MonoBehaviour { void Update() { // set the desired aspect ratio (the values in this example are // hard-coded for 16:9, but you could make them into public // variables instead so you can set them at design time) float targetaspect = 16.0f / 9.0f; // determine the game window's current aspect ratio float windowaspect = (float)Screen.width / (float)Screen.height; // current viewport height should be scaled by this amount float scaleheight = windowaspect / targetaspect; // obtain camera component so we can modify its viewport Camera camera = GetComponent<Camera>(); // if scaled height is less than current height, add letterbox if (scaleheight < 1.0f && Screen.width <= 490 ) { Rect rect = camera.rect; rect.width = 1.0f; rect.height = scaleheight; rect.x = 0; rect.y = (1.0f - scaleheight) / 2.0f; camera.rect = rect; } else // add pillarbox { float scalewidth = 1.0f / scaleheight; Rect rect = camera.rect; rect.width = scalewidth; rect.height = 1.0f; rect.x = (1.0f - scalewidth) / 2.0f; rect.y = 0; camera.rect = rect; } } } i figure that my problem occur in this part of the script: if (scaleheight < 1.0f) { Rect rect = camera.rect; rect.width = 1.0f; rect.height = scaleheight; rect.x = 0; rect.y = (1.0f - scaleheight) / 2.0f; camera.rect = rect; } and its look like this in my mobile phone in portrait: and in landscape mode:

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• xubuntu 12.04 slow boot

  - by user76390

  my xubuntu 12.04 fresh installed boots in more than 30 seconds, here the first big gap in dmesg: [ 1.984795] firewire_core: created device fw0: GUID 000ae4060034203a, S400 [ 2.336568] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) [ 15.465275] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 15.503348] udevd[331]: starting version 175 once booted everything works fine (networks included) thanks for help!

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• Opening a NTFS partition fails with report: Not authorised

  - by Dugi

  Besides lesser errors on 11.10, I ran into a more annoying one: I cannot access NTFS partitions. No matter whether I use nautilus, dolphin, tux commander or archive manager, always does the same thing, could not mount 'disc name': Not authorised' There were several fixes of problems with access to NTFS partitions, but none of them helped. When I used nautilus in sudo mode, the partition looked empty, although when I booted on windows, there were files. It was reported as a bug somewhere. Can anyone help me?

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• Building SANE from git-source produce backend missmatch on 12.04 even if built locally

  - by deinonychusaur

  It seems to me that with Ubuntu Precise Pangolin it is all but easy to do a proper install of SANE from source (git-repo). I've found other scanning issues trying to find an answer to this, where the output people posted seems to indicate they suffer the same issue (unknowingly). If I run on a fresh install of Ubuntu 12.04 with compiled SANE source from the git I get: $ scanimage -V scanimage (sane-backends) 1.0.24git; backend version 1.0.22 (I basically followed the instructions on http://ubuntuportal.com/2012/02/how-to-get-an-canon-canoscan-lide-100-scanner-to-work-in-ubuntu-11-10linux-mint-12.html since I didn't find any other information making sure that sane was not installed prior to installation.) My primary interest is the epson2-backend. In 1.0.22 it offers the wrong TPU settings for Epson V700 (TPU2-mode wasn't supported in 1.0.22, and the scanner is useless to me if I don't have the TPU2-support). Since if I ask it to enter transparency mode, it shows 1.0.22 behaviour, it implies that the epson2-backend comes from 1.0.22 and not 1.0.24 even though I just built it. If I install SANE with prefix to a local folder and run that version of scanimage it still produces the mismatch. However, on another computer where I installed a custom 1.0.22 build of SANE prior to upgrading to Ubuntu 12.04, I can build and install the same SANE-git locally and have it correctly match backends: $ ./SANE/bin/scanimage -V scanimage (sane-backends) 1.0.24git; backend version 1.0.24 $ scanimage -V scanimage (sane-backends) 1.0.22; backend version 1.0.22 On this computer the 1.0.24 works correctly in finding TPU2 on Epson V700. So what am I missing/doing wrong? (And I want to replace 1.0.22 with 1.0.24 for the whole system, the local build was just debugging.) Any help would be much appreciated. Edit 1: Just tried compiling SANE using this instruction on Ubuntu 10.04 and it worked like a charm. However, when I upgraded to 12.04 (really would like to run 12.04), SANE was downgraded to 1.0.22. When trying the same set of instructions on 12.04 I was still out of luck -- the backend missmatch was there again (and I do have libusb-dev installed) Edit 2: I updated to Ubuntu 12.10 which now has the 1.0.23 SANE drivers. I haven't dared trying to compile from source on 12.10 since 1.0.23 is good enough for me. This is just a work-around and I would still like to know what's up with Ubuntu 12.04.

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• iwconfig, iw not displaying wireless information

  - by Srivatsa Kanchi

  after fresh install to 12.10, the wireless information is not shown by both iwconfig and iw. The wireless sets up successfully and able to connect This is what i get $ iwconfig wlan0 wlan0 IEEE 802.11abgn ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=14 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off $ iw wlan0 link Not connected. $ uname -a Linux srivatsa-ThinkPad-T61 3.5.0-18-generic #29-Ubuntu SMP Fri Oct 19 10:26:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

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• Mount: "The disk drive for UUID=<uuid for /> is not ready yet or not present."

  - by searchfgold6789

  I recently did the update from 12.04 to 12.10 on my old Dell Latitude CPx laptop (Pentium III). When I rebooted I got this error message with no response from keyboard input. Below it is says Wait to continue, press S to skip mounting, or M for manual recovery. I also see occasional errors pop up on the screen from mountall and Plymouth. I can still get into Recovery Mode. Can anyone shed some light on the matter?

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• Linux / UNIX: Encrypt Backup Tape Using Tar &amp; OpenSSL

  <b>Cyberciti:</b> "How do I make sure only authorized person access my backups stored on the tape drives (DAT, DLT, LTO-4 etc) under Linux or UNIX operating systems? How do I backup /array22/vol4/home/ to /dev/rmt/5mn or /dev/st0 in encrypted mode?"

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• typeset: not found error when executing shell script. Am I missing a package or something?

  - by user11045

  Hi, below is the error and corresponding script lines: spec@Lucifer:~/Documents/seagull.svn.LINUX$ ./build.ksh ./build.ksh: 36: typeset: not found ./build.ksh: 39: typeset: not found ./build.ksh: 44: function: not found Command line syntax of - options -exec : mode used for compilation (default RELEASE) -target : target used for compilation (default all) -help : display the command line syntax ./build.ksh: 52: function: not found ERROR: spec@Lucifer:~/Documents/seagull.svn.LINUX$ Script Init of variables BUILD_TARGET=${BUILD_DEFAULT_TARGET} BUILD_EXEC=${BUILD_DEFAULT_EXEC} typeset -u BUILD_OS=uname -s | tr '-' '_' | tr '.' '_' | tr '/' '_' BUILD_CODE_DIRECTORY=code BUILD_DIRECTORY=pwd typeset -u BUILD_ARCH=uname -m | tr '-' '_' | tr '.' '_' | tr '/' '_' BUILD_VERSION_FILE=build.conf BUILD_DIST_MODE=0 BUILD_FORCE_MODE=0

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• How do I disable network connection at prelogin?

  - by ProGNOMmers

  --- This question is related to Ubuntu 12.10, since previous versions did not connect to network before login --- I had a bad boot today: the Ubuntu screen was blocked at startup time, after a green [OK] and a white blinking underscore. In recovery mode I figured out the problem: NetworkManager hung trying to connect to a wireless network that wasn't available anymore, and so I couldn't reach the prelogin level. Anyway: I really don't like that the pc connects to a network before the user logging in. How is it possible to disable it?

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• Portal 2 in LEGO Stop Motion [Video]

  - by Jason Fitzpatrick

  If you’re a fan of the Portal video game series, this well-executed LEGO stop-motion film combines Portal characters, clever animation, jokes, and even a Black Mesa reference or two. LEGO Portal 2 [via Wired] How to Factory Reset Your Android Phone or Tablet When It Won’t Boot Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode

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• Mixed java version installed

  - by david99world

  I've got the following in /.bashrc export JAVA_HOME=/usr/bin/jdk1.7.0_03/ export PATH=$PATH:/usr/bin/jdk1.7.0_03/bin This is fine, if I do $JAVA_HOME I get the directory above. The problem is if I do java -version I get... OpenJDK Runtime Environment (IcedTea6 1.11.1) (6b24-1.11.1-4ubuntu3) OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode) How do I make the official jdk version the right one? Sorry I'm extremely new to Ubuntu. Thanks, David

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• Previewing a Demo Level in Mobile for UDK?

  - by Reno Yeo

  I've already clicked on "Emulate Mobile Features" and everything has been compiled. I've also set the mobile previewer settings to iPhone 4's dimensions and features. However, when i click on the mobile previewer, a new window pops up but it goes into a "Not Responding" mode after a while. Is there anything I'm doing wrong? To be honest, I'm afraid of the difficulty curve required in learning UDK, but I am interested in developing a game for it.

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• Dual boot - 12.04 installed first

  - by graeme

  I have found many guides with how to install windows and ubuntu in dual boot mode, but none from the perspective of a Ubuntu user. Unfortunately Wine or OpenOffice do not display a document that I am working on properly so I am forced to getting windows back temporarily. Can anyone give me some guidance on how to go about this, sorry but step by step instructions are needed as I am still fairly new to Linux

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• Combobox binding with different types

  - by George Evjen

  Binding to comboboxes in Silverlight has been an adventure the past couple of days. In our framework at ArchitectNow we use LookupGroups and LookupValues. In our database we would have a LookupGroup of NBA Teams for example. The group would be called NBATeams, we get the LookupGroupID and then get the values from the LookupValues table. So we would end up with a list of all 30+ teams. Our lookup values entity has a display text(string), value(string), IsActive and some other fields. With our applications we load all this information into the system when the user is logging in or right after they login. So in cache we have a list of groups and values that we can get at whenever we want to. We get this information in our framework simply by creating an observable collection of type LookupValue. To get a list of these values into our property all we have to do is. var NBATeams = AppContext.Current.LookupSerivce.GetLookupValues(“NBATeams”); Our combobox then is bound like this. (We use telerik components in most if not all our projects) <telerik:RadComboBox ItemsSource="{Binding NBATeams}”></telerik:RadComboBox> This should give you a list in your combobox. We also set up another property in our ViewModel that is a just single object of NBATeams  - “SelectedNBATeam” Our selectedItem in our combobox would look like, we would set this to a two way binding since we are sending data back. SelectedItem={Binding SelectedNBATeam, mode=TwoWay}” This is all pretty straight forward and we use this pattern throughout all our applications. What do you do though when you have a combobox in a ItemsControl or ListBox? Here we have a list of NBA Teams that are a string that are being brought back from the database. We cant have the selected item be our LookupValue because the data is a string and its being bound in an ItemsControl. In the example above we would just have the combobox in a form. Here though we have it in a ItemsControl, where there is no selected item from the initial ItemsSource. In order to get the selected item to be displayed in the combobox you have to convert the LookupValue to a string. Then instead of using SelectedItem in the combobox use SelectedValue. To convert the LookupValue we do this. Create an observable collection of strings public ObservableCollection<string> NBATeams { get; set;} Then convert your lookups to strings var NBATeams = new ObservableCollection<string>(AppContext.Current.LookupService.GetLookupValues(“NBATeams”).Select(x => x.DisplayText)); This will give us a list of strings and our selected value should be bound to the NBATeams property in our ItemsSource in our ItemsControl. SelectedValue={Binding NBATeam, mode=TwoWay}”

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• openGL managing images, VBOs and shaders

  - by roxlu

  I'm working on a game where I use shaders with vertex attributes (so not immediate mode). I'm drawing lots of images and changing the width/height of the quads I use to draw them a lot. To optimize this it's probably a good idea to have one buffer but then one needs to update the complete buffer when one image changes (or only a part of the buffer using glBufferSubData...) I was just wondering what kind of strategies you guys are using?

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• Read-only filesystem

  - by János Harsányi

  I've resized a partition (ext4) from a Live CD with GParted, and after reboot it says that the file system is read-only. I've rebooted again from the CD and checked it with GParted with no errors. How could I find out why does it re-mount the file system in read-only mode? edit: It starts normally, but after some time, the "/" mount point gets remounted with read only settings, so I think it does have errors eventually. Is there any other way to repair it?

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• Can't start ubuntu on Vaio Z

  - by teocomi

  Hello, I'm trying to install Ubuntu 10.10 32bit on this pc. I have both tried with Wubi from Windows and from USB stick, but after the installation process when I select to boot Ubuntu the screen becomes black and nothing happens (btw I can hear the cpu running)! Notice that maybe it is something related to the graphic card of the pc, since when I use Ubuntu in live mode or during the installation process all the graphics and colors are messed up as if there wasn't an appropriate diriver... What can I do?? Thanks

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• Send Free SMS From PC To Mobile

  In todays'; fast paced environment when everyone is heading a hectic life-style, people want a medium that can be effective along with cost-effective. So, it is very much necessary to find a mode that... [Author: Nisha Garg - Computers and Internet - June 02, 2010]

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• Ralink Bluetooth not working in Ubuntu 13.04

  - by Sourabh

  My Bluetooth is not working in Ubuntu 13.04. I am unable to turn it on and also, Bluetooth icon doesn't show up in the top bar. I asked about this on #ubuntu IRC and they said that I am missing the proprietary drivers for it. There is nothing under Additional Drivers in Software and Updates Bluetooth does work 'Try Ubuntu mode' when I boot Ubuntu from DVD/USB. How can I get the required drivers?

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• Which card readers support HID (Human Interface Device) and emulate keyboard input? [closed]

  - by Level1Coder

  I'm looking for a card reader to interface with an inhouse webapp and need it to emulate keyboard input to type the card data (serial number) into a web form. A simple usage scenario would be where I open notepad, have notepad focused as front most, swipe the card, and the card reader can type out the card data into notepad as plain text. As long as this works, the card data can work with any web form. Which card readers supports this kind of keyboard emulation mode?

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• How do I determine whether bumblebee is working as expected?

  - by Christian Fazzini

  I followed the instructions at https://wiki.ubuntu.com/Bumblebee sudo add-apt-repository ppa:bumblebee/stable sudo add-apt-repository ppa:ubuntu-x-swat/x-updates sudo apt-get update Instead of installing the proprietary nvidia drivers, via: sudo apt-get install bumblebee bumblebee-nvidia linux-headers-generic I did: sudo apt-get install --no-install-recommends bumblebee linux-headers-generic How do I determine that power savings mode is active and that my dedicated GPU isn't running? One thing that bugs me is that if I go to System Settings - Details - Graphics. Driver is shown as Unknown.

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• Can't Run Assault Cube

  - by Debashis Pradhan

  I installed assault cube from the Software centre and it just opens for half a second and closes. When i run in it from the terminal, this is what i get - d@d-platform:~$ assaultcube Using home directory: /home/d/.assaultcube_v1.104 current locale: en_IN init: sdl init: net init: world init: video: sdl init: video: mode X Error of failed request: BadValue (integer parameter out of range for operation) Major opcode of failed request: 129 (XFree86-VidModeExtension) Minor opcode of failed request: 10 (XF86VidModeSwitchToMode) Value in failed request: 0xb3 Serial number of failed request: 131 Current serial number in output stream: 133

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