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• Message "Sparse file not allowed" after succesfull install without swap-partition

  - by FUZxxl

  I've installed Ubuntu without creating a swap partition and with / on a btrfs.# Now I get the message "Sparse file is not allowed" on each boot. This message appears before the splash-screen. Is there a way to kill this warning? # I use some programs that tend to get havoc on memory usage. To prevent them from killing my system, I let the OOM killer do the rest when out of memory rather than making my system unreasonably slow by excessive swapping.

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• unmet dependencies updating Intel graphics driver

  - by Nick Jacobs

  I am trying to update my graphics driver by running: sudo apt-get install xserver-xorg-video-intel But I keep getting this message: Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: xserver-xorg-video-intel : Depends: xorg-video-abi-11 E: Unable to correct problems, you have held broken packages. When I run: sudo apt-get install -f Nothing happens, because the program doesn't even get half way to installing. I am running Lubuntu 12.04 on a HP Mini 110 netbook. I have tried changing to several different ppa's but that doesn't work. I want to update my driver so that my mouse stops flickering and ScummVM stops flickering every minute.

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• Where can I find the supported way to deploy hadoop on precise?

  - by Jeff McCarrell

  I want to set up a small (6 node) hadoop/hive/pig cluster. I see the work in the juju space on charms; however, the current status of deploying a single charm per node will not work for me. I see ServerTeam Hadoop which talks about re-packaging the bigtop packages. The cloudera CDH3 installation guide talks about Maverick and Lucid, but not precise. What am I missing? Is there a straight forward way to deploy hadoop/hive/pig on 6 nodes that does not involve building from tarballs?

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• Blurry printed raster images with Brother MFC-8840D

  - by Adam Monsen

  (NOTE: crossposted here: ubuntuforums.org/showthread.php?t=1621795) I've got a Brother MFC-8840D. Works great with Ubuntu server! Setting up a CUPS print server was pretty straightforward, and I also finally got network scanning working reliably with saned. Printing documents and Web pages works well: fonts are crisp/clear, etc. One issue has got me completely vexed: printing raster (ie: JPG) images. They are blurry. For example, I can scan a page of black and white text at 150 or 300 dpi. The grayscale image looks perfect on my monitor. But the printed version is much blurrier than the original, regardless of the "print resolution" dpi I choose. As a counterexample, if I use the "copy" function of the MFC-8840D, the copy looks excellent, and this function is much, much faster than if I scan then print a scan of same. I've googled around a bunch and tried different tricks (printing a PDF with the image from evince, printing with Gimp, EOG and other applications) but I just can't print anything that looks as good as a copy made with the MFC-8840D. Any ideas? I'm using Ubuntu 10.04.1 LTS server. I'm using the PPD file from solutions.brother.com. Thanks, -Adam

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• How do I make my volume indicator operate in decibels instead of percentage?

  - by ethana2

  When I want to adjust the volume of anything I'm doing, I find that using the volume controls built into Ubuntu is little but confusion. When the volume is around 100%, dropping it several increments has almost no effect on apparent volume, but when it's around 0%, the effect of one click of my mouse wheel is probably a good 3 decibels. I have observed this behavior on tens of different UC's, since I convert about one Ubuntu user a month (NE team contact). This has proven so frustrating to me that I tend to use the volume knob on my guitar amp ( mono audio :| ) instead of the volume indicator. What can I do to make my volume indicator behave properly until this is fixed? I want each volume increment to be one half or one third decibel. Is there a different piece of software I should use for system volume configuration perhaps?

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• Ubuntu 13.10 install VMware 9.0

  - by user212290

  After I install the VMware workstation 9.0, while when I want open the VM, there come the dialogue "Before you can run VMware, several modules must be complied and loaded into the running kernel CANCEL INSTALL",while I clicked the INSTALL button, nothing happened. When: sudo apt-get install linux-headers-3.11.0-12-generic sudo /usr/bin/vmware-modconfig --icon=vmware-workstation --appname=VMware come: cc1: some warnings being treated as errors make[2]: *** [/tmp/modconfig-T9k19t/vmci-only/linux/driver.o] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [_module_/tmp/modconfig-T9k19t/vmci-only] Error 2 make[1]: Leaving directory `/usr/src/linux-headers-3.11.0-12-generic' make: *** [vmci.ko] Error 2 make: Leaving directory `/tmp/modconfig-T9k19t/vmci-only' Failed to build vmci. Failed to execute the build command. Starting VMware services: Virtual machine monitor done Virtual machine communication interface failed VM communication interface socket family done Blocking file system done Virtual ethernet failed VMware Authentication Daemon done

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• External display suddenly not detected

  - by NChase

  I have a Lenovo IdeaPad U410 running Ubuntu Desktop 13.04. I have an external monitor that I connect to via HDMI, and it's worked flawlessly for six months. I plug in my laptop, it detects the display. The "change display" key built into the laptop works for switching between the two screens. Never any problems. This afternoon, when I reconnected my computer after taking it into another room for a bit, it didn't work. When I open up Display settings, it can't detect the display. I tried disconnecting/reconnecting everything multiple times. And most strangely, that same "change display" key now behaves like a Super key, opening the dash instead of toggling the display. Nothing at all changed between when I plugged it in this morning and when it stopped working a few hours later. I tried xrandr, that doesn't detect it either. Anyone have any ideas?

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• How to solve this problem starting new Opera-windows on dual monitor-setup?

  - by Mnementh

  I use Opera and have a setup with two monitors. If I want to open a new URL opera -newwindow URL. The outcome differs, if I execute this command in a program on the same screen where Opera is, or on the other. On the same screen everything is fine. I get the message opera: Activated running instance and the new window with the URL is opened. On the other screen, I get a dialog with the following message: It appears another opera instance is using the same configuration directory because its lock file is active: /home/(my name)/.opera/lock and the URL is not shown. That's not only from console, also if I click a link in E-Mail or so. How can I fix this? Window-manager is awesome, if it does make a difference.

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• .bash_history and .cache

  - by John Isaacks

  I have a user who's home directory is a Mercurial repository. Mercurial notified me that there were 2 new unversioned files in my repository. .bash_history and .cache/motd.legal-displayed. I assume bash_history is the history of bash commands for my user. I have no idea what the other is. I don't want these files to be versioned by Mercurial, are they safe to just delete, or will they come back, or mess something up? Can they be moved to somewhere else? Or do I have to add them to my .hgignore file?

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• how can i fix this problem with mount volume in ubuntu 10.10?

  - by Ali Unlu

  I have two operating system: ubuntu 10.10 and windows 7 ultimate. I trisected my HDD.One of these is for main Windows files,one of this for ubuntu system and the last drive which must be accessible on both of two system is for common files (musics, films, etc). This last partition is J: in Windows. Unfortunately when I was setting up ubuntu 10.10 while disk partition, I forgot mount my J drive as /windows and accidentally mounted it as swap . Then, I tried to do this visible in ubuntu.But I couldn't myself. Device : /dev/sda4 and whenever I try to do this I always get this error : Error mounting: mount exited with exit code 1: helper failed with: mount: according to mtab, none is already mounted on none mount failed

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• mic on cam don't work

  - by ezz9

  the cam works. I pull up PulseAudio I can see it pick me up for 1sec then stops. don't work on Skype I've tried every USB port same thing it worked on 10.04 fine. but now I'm on 12.04 and it don't work. it is a logitech B500 desktop:~$ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 046d:0807 Logitech, Inc. Webcam B500 Bus 003 Device 002: ID 03f0:6104 Hewlett-Packard DeskJet 5650c Bus 005 Device 002: ID 046d:c51b Logitech, Inc. V220 Cordless Optical Mouse for Notebooks I have changed some setting in flash Player Settings Manager, I don't think it would affect it after all the cam is still working it's the microphone that freezes up, but thought I would tell you this, info is good.

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• What are the common pitfalls that would stop Authorised Key SSH access, and how do I find and correct for them?

  - by Ashimema

  EDIT: This question was reworked to make it more useful to the community and less specific to me. Questions seem to come up reasonably often regarding ssh and problems with authorised keys access, but very few seem to have a clear answer anywhere; Server keeps asking for password after I've copied my SSH Public Key to authorized_keys ssh not accepting public key how do I use ssh with key access in 11.10 passwordless ssh not working So, In the communities opinion, what is the tried and tested method for getting to the bottom of such problems?

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• Cannot read from 2nd SATA data drive connected via SATA docking station

  - by Robbo

  Installed 10.10 this week on dual boot system. Everything else works fine but cannot read from 2nd SATA drive with all my data. Same drive works normally when booted to Windows XP. Interesting part is that I can see the drive in Ubuntu Disk Manager, can read all its attributes, can test it, shows up in Disk Manager, Storage Device Manager and Mount Manager, and can mount it, even change attributes; it appears healthy but does not show up in "Computer" or anywhere else that it can be accessed. The drive is connected via an external e-SATA docking station which is connected to a SATA port on the motherboard.

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• xvkbd broken with warnings

  - by Maxrunner

  Im using the latest version of ubunto and i cant run xvkbd properly, i get these errors: $ xvkbd Warning: Cannot convert string "--lucidatypewriter-bold-r--*-12---*---iso8859-1" to type FontStruct xvkbd: Mode_switch not available as a modifier xvkbd: although ISO_Level3_Shift is used instead, AltGr may not work correctly Warning: Cannot convert string "--lucida-bold-i--*-14---*---iso8859-1" to type FontStruct xvkbd: Mode_switch not available as a modifier xvkbd: although ISO_Level3_Shift is used instead, AltGr may not work correctly how can i solve this?, im trying to use this with xbindkeys.

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• What are the advantages and disadventages of git or bzr + rsync vs rdiff-backup?

  - by Azendale

  I used to use rsync to do backups, but then I switched to rdiff-backup to incremental backups. Recently, I discovered git and bzr while working on a coding project. So, I was thinking, I could have my backup disk be a repository in either git or bzr. Then I could rsync to the repository, and commit the changes. Would there be any performance concerns with this? Any other issues that I'm not thinking of? The benefit I see in using rsync is that you can restart an interrupted transfer, while rdiff-backup reverts to the last version, and then starts again. Any reason not to do it this way? Anything I'm not thinking of?

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• Juju bootstrap fails for Windows Azure

  - by tomconte

  I am trying to play with Juju on Windows Azure. I did the configuration part, however the boostrap fails on a network configuration error: 2013-10-29 10:08:49 ERROR juju supercommand.go:282 PUT request failed: BadRequest - XML Schema validation error in network configuration at line 75,18. (http code 400: Bad Request) How can I troubleshoot? Can I find somewhere the XML file to examine it? Thanks! Thomas.

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• Enable remote VNC from the commandline?

  - by Stefan Lasiewski

  I have one computer running Ubuntu 10.04, and is running Vino, the default VNC server. I have a second Windows box which is running a VNC client, but does not have any X11 capabilities. I am ssh'd into the Ubuntu host from the Windows host, but I forgot to enable VNC access on the Ubuntu host. On the Ubuntu host, is there a way for me to enable VNC connections from the Ubuntu commandline? Update: As @koanhead says below, there is no man page for vino (e.g. man -k vino and info vino return nothing), and vino --help doesn't show any help).

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• Ubuntu boots into tty1 after driver downgrade

  - by Zach

  Earlier today I downgraded the driver for my nvidia 240 GT from version 310 to version 304 using ubuntus "additional drivers" utility. After the install I rebooted but instead of opening unity and allowing me to login it booted into tty1 instead. After using the "startx" command I got the message, "nvidia: API mismatch: the nvidia kernel module has version 310.14, but this nvidia driver component has version 304.43." What can I do to solve this? Edit: Solved my own problem by purging all nvidia packaged and reinstalling my drivers.

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• Canon Multitasking printer: Scanner doesn't work, printer does

  - by Holger Böttcher

  Model: Canon Prixma MG2260 I have installed to ubuntu 14.04 Trusty Tahr. Now I have the problem by my multi function device. The printer works, but the scanner doesn't! I have downloaded the Linux software of Canon for the 2200 series. I have downloaded the software of the Internet site of Canon. 6 Zip folder 3 deb. and 3 rpm. Always 1 for computer, 1 for scanner, 1 for other Thinks. I can load them on my PC and unpacking, but they do not install themselves. Does any person know what I have to do about this?

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• Ubuntu 11.10 crashes all browsers often

  - by murat

  I have been using ubuntu 11.10 for 1 year,today it made me surprised. When I open google chrome it just closes itself. Firstly i thought that it is just for chrome and tried Firefox : It also closes itself and one thing more : I tried desktop programs such as image viewer it also closes itself.I restarted it but there is no changing.What can do this ? is it virus or another system problem ? I did not have any problem like this until today.. $ google-chrome (google-chrome:7064): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (google-chrome:7064): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (google-chrome:7064): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (google-chrome:7064): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", --2012-04-04 19:33:14-- https://clients2.google.com/cr/report Resolving clients2.google.com... 173.194.70.100, 173.194.70.101, 173.194.70.102, ... Connecting to clients2.google.com|173.194.70.100|:443... connected. HTTP request sent, awaiting response... 200 OK Length: unspecified [text/html] 2012-04-04 19:33:19 (888 KB/s) - `/dev/fd/3' saved [16] (exe:7166): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7166): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7166): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7166): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", Moonlight: 3.99.0.3 Moonlight: Attempting to load libmoonloaderxpi (exe:7201): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7201): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7201): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7201): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory Segmentation fault After trying to install libvdpau1 error is changed : google-chrome --2012-04-04 20:05:03-- https://clients2.google.com/cr/report Resolving clients2.google.com... 173.194.70.113, 173.194.70.138, 173.194.70.139, ... Connecting to clients2.google.com|173.194.70.113|:443... connected. HTTP request sent, awaiting response... Moonlight: 3.99.0.3 Moonlight: Attempting to load libmoonloaderxpi 200 OK Length: unspecified [text/html] Saving to: `/dev/fd/3' [<=> ] 0 --.-K/s f4c55117d1b4656e [ <= ] 16 --.-K/s in 0s 2012-04-04 20:05:12 (337 KB/s) - `/dev/fd/3' saved [16] Segmentation fault

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• Strange sound issues with Ubuntu 11.10

  - by DNA

  I am having strange issues with sound and volume with Ubuntu 11.10 I've noticed very often, especially when I get my computer out of sleep, it lacks sound even though the volume slider is cranked all the way up. But when I plug my headphones in and then take them out, it seems to kick start my sound back! What gives? What daemon in /etc/int.d needs to be restared with the restart command to fix this? I have the following in my init.d folder /etc/init.d/alsa-restore and /etc/init.d/alsa-store Also, my start up ubuntu sound doesn't play either....

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• 'dd' access to a drive

  - by John

  I've been working with making custom bootloader and kernel code (not necessarily Linux kernel). I'm putting the images on USB, and was using dd to place them on the sector they needed to be on, and I'm getting tired of burning the image to /dev/sda instead of /dev/sdb (effectively destroying my hard drive). So I was wondering if I could somehow give user access to the 'dd' command, but only to the /dev/sdb drive, so that if I accidentally type /dev/sda it won't let me, because I wouldn't have run the command as sudo or root.

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• add packages to squid-deb-proxy cache

  - by zpletan

  To save bandwidth and data on my Internet plan, I have installed squid-deb-proxy on a desktop, and the client on it and a few other machines I've got. However, based on the post that put me onto this , it sounds like if I take my laptop to a different network and update it there, the downloaded updates will NOT be automatically copied back to the squid-deb-proxy server when I get back on my network. Assuming that this is correct (I will be testing later), is there a way I can stick these packages into the cache so I don't have to download them one more time for other machines in the network?

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• Ubuntu App Contest - Open Source Libraries

  - by Chao

  I just found out about and started looking into the Ubuntu App Contest, and I wanted to double check the contest's stance on using open source libraries built by others that are freely available on the web. I read through the rules and some of the other Q&As, and it sounds like using these libraries would not be allowed (since it could mean the app isn't built from scratch, and the library would not be in the Ubuntu archive - although I could bundle the library with the app), and I just wanted to verify this assumption. Thanks! Chao

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• How to hide bind mounts in nautilus?

  - by Bazon

  Summary: How do I remove folders mounted via bind or bindfs in /etc/fstab from appearing as devices in nautilus left column, the "places" view? detailed: Hello, I mount various directories from my data partition via bind in /etc/fstab in my home directory, eg like this: #using bind: /mnt/sda5/bazon/Musik /home/Bazon/Musik none bind,user 0 0 #or using bindfs bindfs#/mnt/sda5/tobi/Downloads /home/tobi/Downloads fuse user 0 0 (Background: /dev/sda5 mounted to /mnt/sda5 is my old home partition, but I do not want to mount it as a home partition, as I always have at least 2 Linuxes on the computer ...) That works well, but since 12.10 every one of those items is listed in Nautilus in the left column under "Devices". (Where normally USB drives appear, etc.) This is a waste of space (as I have many of such mounts...) and so I would like to have these mounts hidden, just as it was before in 12.04. How can I do that? Thanks!

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