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• How do I ban a wifi network in Network Manager?

  - by Chris Conway

  My wifi connection drops sometimes and, for some reason, Network Manager attempts to connect to my neighbor's network, which requires a password that I don't know. The network in question is not listed in the "Edit Connections..." dialog and I can find no reference to it in any configuration file, but still the password dialog pops up every time my main connection drops. Is there a way to blacklist a wireless network so that the Network Manager will never attempt to connect to it? Or, equivalently, how can I remove the configuration data that causes the Network Manager to attempt to connect to this particular network?

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• Delta-update Firefox Aurora package from PPA

  - by ignite

  I am using Firefox Aurora in my Ubuntu 12.04 which I have installed via its ppa (ppa:ubuntu-mozilla-daily/firefox-aurora). As expected of Aurora, I get an update usually after 2-3 days. I have Firefox Aurora installed in Windows too. There also I get updates in 2-3 days but size of update is usually 4-5 MB, while in Ubuntu it's always around 20 MB. What is the reason for this difference? Is there any way by which I can download and install only the changes and not the entire Aurora again and again?

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• pulseaudio and alsa on ubuntu 12.04 server

  - by Dan

  I am running ubuntu 12.04server, and trying to get pulseaudio working. I followed the instructions at How do I run PulseAudio in a headless server installation? At the moment, pacmd list-cards is reporting 0 cards, aplay will only playing sound when I run it as sudo, and running alsamixer as sudo also works, but running it as my user produces "cannot open mixer: No such file or directory" As far as I can tell, this means the the kernel module for my sound card is in fact loaded. I have already tried adding my user to the "audio" group, but this does not help. The permissions on the devices in /dev/snd are all crw-rw---T 1 root audio 116 I noticed on an ubuntu 12.04 desktop, that the file permissions are slightly different. On the desktop, they are crw-rw---T+ 1 root audio 116 My questions are 1) How do I get aplay to work without running it as sudo on the server 2) Is there anything special I need to do to make pulseaudio work at this point.

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• Desktop top is lower than it should be

  - by Idan Arye

  I have a very odd problem with Ubuntu 11.10. Here is a picture of it: The window in the picture is maximized, but for some odd reason it does not cover the entire desktop area. That area of the desktop the window does not cover is a dead area - I also can't drag desktop items to there, though I can drag not-maximized windows to that area. Rebooting doesn't help. The problem started after I configured some windows partitions to automount on startup(though I don't see how that could cause the problem...) Does anyone know a way to fix this?

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• DSL modem problem in 11.10

  - by Misterious

  Earlier I used Windows 7 and the modem used to work absolutely fine. Even when it got disconnected it used to reconnect automatically without any trouble. But then I installed Ubuntu 11.10 on dual-boot and set up the modem connection properly but the modem now disconnects much more frequently (earlier it disconnected once in 5 hours or so and after Ubuntu in 5 minutes!). Also once disconnected, it does not reconnect even when I have checked the "Connect Automatically" button. I have to restart the system to reconnect it. I the clean installed Windows and modem works perfectly fine again. What is the reason for this and how can I solve this? I really want to use Ubuntu but due to this problem I can't.

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• ATI Proprietary Driver Over/Underscan setting ignored after reboot

  - by Lassi

  I installed the proprietary driver (fglrx-updates) on Ubuntu 12.10 64-bit for my graphics card (ATI Radeon HD 7570). I am using two displays, one connected with DVI, one with HDMI. I set the desktop to be expanded to both screens and disabled the under scan for the HDMI screen, which is always for some reason enabled on HDMI screens. Now the issue. Everything was fine until I restarted my computer. After reboot, the screen connected with HDMI cable had the black borders again, meaning that the under scan is again enabled. I checked the ATI CCC, and under scan was disabled. However, moving the slider to enable under scan and then back to zero fixed the issue -- temporarily. The same issue is repeated every time I restart my computer. The settings remains the same, but the computer seems to ignore it. Any ideas how I could solve the issue?

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• gstreamer vaapi problem

  - by squallbayu

  I installed gstreamer-vaapi from this PPA : ppa:guido-iodice/video sudo apt-get install gstreamer0.10-vaapi libgstvaapi-x11-0 libgstvaapi0 but, if I run totem movie player (via terminal) it's show this error : (totem:3383): GLib-GObject-WARNING **: g_object_set_valist: object class 'TotemScrsaver' has no property named 'reason' (totem:3383): GLib-GObject-WARNING **: value "10752000" of type 'guint' is invalid or out of range for property 'connection-speed' of type 'guint' libva: libva version 0.31.0 Xlib: extension "XFree86-DRI" missing on display ":0.0". libva: va_getDriverName() returns 0 libva: Trying to open /usr/lib/dri/nvidia_drv_video.so libva error: /usr/lib/dri/nvidia_drv_video.so init failed libva: va_openDriver() returns -1 Segmentation fault It's seems I get wrong nvidia_drv_video.so. What should I do? If I uninstall it, it's work fine, but I want to use this vaapi backend for my video decoding via GPU while I run gstreamer based apps. PS : I use Ubuntu Lucid 64bit and MSI CR 400 Notebook : Intel Core 2 Duo Nvidia 8200M

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• How to prevent creation of monitors.xml?

  - by user222723

  I'm using Ubuntu on a tablet and have a problem with the screen rotation, which I can fix by removing ~/.config/monitors.xml, but sadly every time I rotate the screen a new monitors.xml is created. Is there any way to prevent this? I already tried to create an empty file with the same name as root but it was still overwritten after rotating the screen. Edit: I think I finally found the reason for the problem. Everytime the orientation is changed the new orientation is saved in monitors.xml while the original monitors.xml is saved as monitors.xml.backup. By playing around with chattr I found out that this causes Ubuntu to try to restore monitors.xml out of monitors.xml.backup after every login. So if I turn the screen to the left and then back to normal monitors.xml says "orientation=normal" and monitors.xml.backup says "orientation=left". After the login Ubuntu overwrites monitors.xml with the backup and uses its configuration and turns the screen to the left.

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• Internet connection is very slow

  - by ThanujJA

  I use GSM onnection to surfe internet. Before I move to ubuntu I used windows 7 OS. It gives me good speed with GSM connection (100 kbps) But now ubuntu gives me very slow speed.(2-3 kbps) Now it make difficult to use GSM connection. In my country (Sri Lanka) mobile brodbrand servises are very expensive so I cant move to onother one. If I use GSM connection they gives me free data (Airtel connection) So it is most valuable reason for me to use GSM connection. Please anybody help me to speed up my network. Thanx

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• apt-get update bzip2 errors

  - by Tejas Kale

  I installed Ubuntu 11.10 today on my Lenovo w500. After that when i tried running sudo apt-get update This is the error i am getting. Get:117 http://ftp.jaist.ac.jp oneiric-security/universe TranslationIndex [73 B] 99% [48 Sources bzip2 0 B] [22 Sources bzip2 5,294 kB] 1,983 kB/s 0s bzip2: Compressed file ends unexpectedly; perhaps it is corrupted? *Possible* reason follows. bzip2: Inappropriate ioctl for device Input file = (stdin), output file = (stdout) It is possible that the compressed file(s) have become corrupted. You can use the -tvv option to test integrity of such files. You can use the `bzip2recover' program to attempt to recover data from undamaged sections of corrupted files. I found the following similar question : Errors while updating Ubuntu 11.10 , But the solutions mentioned ( changing the download server, running apt-get clean, apt-get autoclean) and have also tried removing the /var/cache/apt/archives/lists direcotry. As a result of this, I am unable to install any new packages.

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• Using a DisplayLink USB video adapter on Ubuntu 12.10

  - by Jason R

  The line of USB video adapters made by DisplayLink has a somewhat sordid history under Linux. In past Ubuntu releases, the process of getting them to work has been somewhat difficult, inspiring a number of past questions on this site: example 1 example 2 example 3 However, there are some indications that version 3.5 of the Linux kernel (which is used by 12.10) contains better support for these adapters, which should make them easier to use. I currently have a single-GPU machine (it is an Nvidia adapter) with dual monitor outputs. I would like to add the DisplayLink adapter to drive a third external monitor. How can I set this up on Ubuntu 12.10?

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• library put in /usr/local/lib is not loaded

  - by IARI

  Let me state in advance: One might think this question would is for server fault, but I think is is Ubuntu (config) specific. In short: I have put libwkhtmltox.so in /usr/local/lib as stated in installation instructions linked below, but it appears the library is not loaded. I am trying to install php-wkhtmltox, a php extension for wkhtmltox on my local desktop (Ubuntu 12.04). I have extracted the source and changed to the corresponding directory. After running phpize, ./configure fails at checking for libwkhtmltox support... yes, shared not found configure: error: Please install libwkhtmltox I suspect the reason the library is not loaded is that the path is not checked!? how do I proceed? Here are instructions I followed: http://davidbomba.com/index.php/2011/08/04/php-wkhtmltox/ http://roundhere.net/journal/install-wkhtmltopdf-php-bindings/

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• Does the Ubuntu One sync work?

  - by bisi

  I have been on this for several hours now, trying to get a simple second folder to sync with my (paid) account. I cannot tell you how many times I removed all devices, removed stored passwords, killed all processes of u1, logged out and back in online...and still, the tick in the file browser (Synchronize this folder) is loading and loading and loading. Also, I have logged out, rebooted countless times. And this is after me somehow managing to get the u1 preferences to finally "connect" again. I have also checked the status of your services, and none are close to what I am experiencing. And I have checked the suggested related questions above! So please, just confirm whether it is a problem on my side, or a problem on your side.

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• How to check command line requests routed thru TOR?

  - by Chris

  I think I have virtualbox set up so that all traffic originating from the guest OS is routed through TOR. TOR is only installed on the host OS and the web browsers on the guest OS all report TOR IP's in Europe when I test with seemyip.com. The host OS shows my real IP when going to the same sites. But I initiate a lot of requests from the Linux command line and I haven't been able to confirm to my satisfaction that these are routing through TOR, though I have no reason to think they do not. When I use this command I get no output from the guest OS, but my real IP from the host OS: dig myip.opendns.com @resolver1.opendns.com +short This bash file gives no output from either OS: #!/bin/bash echo Your external IP Address is: wget http://Www.whatismyip.com -O - -o /dev/null | grep '<TITLE>' | sed -r 's/<TITLE>WhatIsMyIP\.com \- //g' | sed -r 's/<\/TITLE>//g' exit 0 Suggestions?

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• How do I Set PATH in /etc/profile.d?

  - by Rodrigo Sasaki

  I'm using zsh as my shell, and I'm trying to configure my environment. I usually define my $JAVA_HOME variable by creating a file: /etc/profile.d/java.sh with the following content export JAVA_HOME=/path/to/jdk export PATH=$JAVA_HOME/bin:$PATH then I logout and back in, and it all works, but for some reason the PATH variable is not set. It recognizes JAVA_HOME, but not the new PATH, see this terminal snippet: ~ echo $JAVA_HOME /usr/lib/jvm/jdk1.8.0_05 ~ echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games and I confirmed it by trying to run a command form the jvm ~ java -version zsh: command not found: java the PATH doesn't include the $JAVA_HOME as it should. is there something else I should check? EDIT I have checked that if I run source /etc/profile.d/java.sh it all runs correctly and my variables get set as they should, but shouldn't the scripts in /etc/profile.d run automatically?

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• virtualbox host | Ubuntu vs XP

  - by iambriansreed

  In order to lengthen the lifespan of my machine I am replacing the weakest link, the hard drive and installing a new OS. I had planned on using xp pro as my virtualbox host and ubuntu as guest. After messing with ubuntu desktop and server I am really impressed and am thinking of reversing the virtualbox setup; ubuntu host xp guest. I would use XP for Adobe Fireworks, Netflix, and iTunes (maybe) that's pretty much it. Any reason not to do ubuntu host with xp guest? I know the xp vbox will run slower as a guest but really how much slower? It's a desktop. 4gb ram, 500gb disk, Pent D 3.2 ghz

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• Numpad doesn't work after booting up - forced to reconnect USB keyboard after startup

  - by HorusKol

  I've tried this on two different USB keyboards - both of which work fine on a different computer running Windows XP. For some reason, the numerical keypad doesn't work probably immediately after booting up - neither the numbers work, nor the 'home' commands and so on that you can use with the numlock off. It doesn't make a difference whether I press numlock on or off - the keypad doesn't work correctly no matter what state this is in. However, once I've booted the machine I can disconnect/reconnect the USB connector for the keyboard, and it will work exactly as expected. I'm running Gnome on Ubuntu 10.04. The only other USB devices connected is a mouse - and I've experienced no problems with that. This is a direct connection to the box (not via an external USB hub)

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• Swap and hibernation

  - by maaartinus

  I saw a lot of recommendations claiming that for hibernation the swap partition/file must be at least as large as the main memory. This makes no sense to me. Lets assume I have 8 GB of main memory and 8 GB swap area and want to hibernate: case 1: I'm using 4 GB of virtual memory - 8 GB of swap is unnecessarily large. case 2: I'm using 8 GB of virtual memory - 8 GB of swap is just right. case 3: I'm using 12 GB of virtual memory - 8 GB of swap is too small. The outcome is: A swap area of size equal to the memory size is sufficient for hibernate IFF it doesn't get used for swapping at all. So what is the reason behind the claim that you need at least as much swap area as main memory for hibernate to work? I know that virtual memory gets used for caching too, and that the cache may be simply discarded, but what happens to hibernation if a program allocates 12 GB of virtual memory (given the above memory and swap sizes)?

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• Remapping Shift Selection in Gnome Terminal

  - by Gowie47

  Hey so I was hoping somebody could help me out in finding a way to get shift-selection working in gnome-terminal on Ubuntu 11.10. I found the question/bug report below but neither seem to have a solution. I use Emacs for development and being able to select my current line with shift-ctrl-a/e is something I find myself trying to do every couple of minutes. I use 10.04 at work and this is possible so I am not sure what has changed. If it matters I am using Gnome 3 Shell and I use bashish to style my terminal. Thanks in advance! https://bugs.launchpad.net/ubuntu/+source/vte/+bug/546021 http://askubuntu.com/questions/31991/using-the-shift-key-in-terminal

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• How is ~/bin added to my path?

  - by Hari Sundararajan

  I have not added ~/bin to any of my .bash* files. However, $PATH does list that directory. The reason I am asking this in the Ubuntu specific StackExchange is because, well, I have exactly the same .bashrc, .bash_profile and .bash_aliases in both Fedora and Ubuntu machines (in fact, I have them on Dropbox and symlinked in ~) and in my Fedora machines, ~/bin is not added. In other words, if I add ~/bin to my path by making an entry in .bashrc, it shows up once on Fedora and twice on Ubuntu. Where is ~/bin being added to my path?

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• Rhythmbox plugin radio-browser crashes

  - by Marco

  I have just installed the plugins package from fossfreedom repository on my Rhythmbox 2.96 running on 12.04 (64 bit). The radio-browser plugin crashes Rhythmbox after a few seconds of playing. When I restarted Rhythmbox after the crash, the plugin was marked as "error" and it is impossible to reinstall it. I've then manually removed (sudo apt-get remove ...) and reinstalled it but still I can't enable it. Unfortunately, radio-browser was the reason for me to install the plugin package, and I can't use it... Help please?

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• Ubiquity crashes when installing Ubuntu 10.10 from CD

  - by Ashes

  I didn't want to take any risks so I ordered a CD from Canonical to get Ubuntu. Thing is, another CD was given to me about 2 days before the CD from Canonical got to me, so I installed Ubuntu 10.10 but there was a problem with the login screen (When the Ubuntu logo should be displayed, it wasn't, instead it would just say "Ubuntu 10.10") so I decided to reinstall Ubuntu 10.10 with the CD that arrived a few days later. Whenever it's finishing the installation, the installer (ubiquity) crashes, or sometimes it gets to the part where the boot loader should be installed and for some reason it is unable to install the boot loader (if I choose not to install it, I don't get how to start Ubuntu, since you have to reboot my laptop after the installation is over). I'm currently running Ubuntu 10.10 from the CD I ordered, since I have no other OS on this laptop.

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• Software installed on root partition or on home partition

  - by Tim

  I am planning to install some big softwares such as Matlab (4GB), Mathematica (4GB) on my Ubuntu partitions. I was wondering if I installed them on my home partition, when I reinstall Ubuntu without touching the home partition, will the softwares still be runnable after reinstallation? what are the advantage and disadvantages of installing softwares on root partition and of on home partition? with your answer to the previous questions, what are some reasonable plans for the sizes of root partition and of home partition? Note that I would like to learn programming in C, C++, Java, Python, Lisp, databases under both Ubuntu and Windows, and no games. My laptop has around 230 GB, where I plan to install both Windows and Ubuntu, and reserve 40 GB for Ubuntu (three partitions: swap, root and home), 110 GB for NTFS partition shared between the two OSes, 70 GB for Windows OS partition, and 10 GB that can be added to any of the above partitions. I will change my plan according to your suggestions. Thanks and regards!

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• ltsp: install in chroot with GUI-Installer (lirc)

  - by Roberto

  I am trying to install "lirc" into chroot. Installing lirc requires "answering 2 questions". I am on Ubuntu Desktop 12.04. (in Virtualbox) I try this way: https://help.ubuntu.com/community/UbuntuLTSP/GuiInstallLocalApp but I had errors and then the server would hang on reboot. No big surprise, the guide says it is valid for 9.04. Maybe I could create " debconf.seeds" ( https://help.ubuntu.com/community/UbuntuLTSP/FatClients ) but I dont know how to. Could somebody point me in the right direction? thanks Roberto

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• Right click menu stopped working in firefox

  - by umpirsky

  Right click menu stopped working in firefox as well as address bar auto completion. I have tried removing and installing firefox again from software center, but the problem persist. UPDATE: Hehum, strange. I wanted to restart in safe mode, clicked help menu, and noticed that menu is ubuntu software center menu! Then cllosed software center, and menu was gone. So now right click is working, auto complete is working, but there is no main menu! Probably unity global menu integration problem. Also, there is no firefox in launcher nor alt+tab any more. Any idea? UPDATE: For some reason, it works after computer restart :o

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