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• Sony Vaio Webcam

  - by Martin H

  I have a in-built webcam in my Sony Vaio VGN-FE21M. lsusb shows me the device Bus 001 Device 003: ID 0ac8:c002 Z-Star Microelectronics Corp. Visual Communication Camera VGP-VCC1 and it is working within Skype most of the time. Sometimes, however, lsusb shows me the exact same output, but trying to test my cam in v4l2ucp I get the error Unable to open file /dev/video0 No such file or directory A reboot fixes the problem but I just can't pinpoint what the difference is between a working and a not working webcam and the time/instance this occurs. It would probably be a fix if i could unmount and remount the cam, but how can I do this with in-built devices? Any other advice is welcome as well.

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• Send arbitrary commands to modem for info

  - by mydoghasworms

  I have a USB 3G data card and modem. According to the supplier, to check the data balance on the account, I must dial a number like *89# (or whatever) from the handset. The device appears as a ppp0 interface in my network devices. How does one go about issuing commands to the modem to send the commands and receive back the information? UPDATE: OK, I found some help here: http://www.linuxquestions.org/questions/linux-hardware-18/sending-at-commands-to-a-sms-modem-372445/, but firstly, there are 3 ttyUSB devices on my system, and I assume that one of them is the 3G modem, but how can I tell? Secondly, trying to echo something to two of them says that the device is busy, which stands to reason, because I am using it to connect to the internet. Some help, please?

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• How can I fix crashing Flash on Chromium?

  - by dv3500ea

  If I try to watch any flash video, I get a notification bubble telling me that the Shockwave Flash plugin has crashed. When run from the terminal, I get this error whenever flash crashes: [xxxx:xxxx:xxxxxxxxxx:FATAL:base/process_util_linux.cc(594)] Out of memory. where the 'x's are seemingly random numbers. Chromium reports its version as 9.0.597.94 (73967). I have tested in other browsers (Midori, Firefox) and flash works properly there. This is a new problem, that I assume was caused by an upgrade. How can I fix this?

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• Xubuntu: Disks utility (palimpsest) and Gparted not showing up anywhere after installation

  - by Noam Gagliardi

  So I've downloaded Gparted and Disks from the software center. According to software center, they've both installed successfully... but they're nowhere to be found. Even in my terminal: $ palimpsest palimpsest: command not found I've looked in usr/bin... no "palimpsest", no "gnome-disk-utility". In usr/share/gnome-disk-utility there's a bunch of .ui files. According to Software Center, both programs are now installed in my computer, but it seems I've no way to find them. I've tried re-installing and restarting. I'm on Xubuntu 32 bit.

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• How to connect to DSL modem using PPPoE?

  - by VJo

  Hello, I am connecting to the internet through a pppoe connection, but for some reason I can not connect to my modem (it's address is 192.168.1.1). Before I set my pppoe connection, I could connect. So, is there a way? EDIT The output of ifconfig is : r@PlaviZec:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:13:d4:f7:02:d4 inet6 addr: fe80::213:d4ff:fef7:2d4/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2811 errors:0 dropped:0 overruns:0 frame:0 TX packets:2801 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2538831 (2.5 MB) TX bytes:448591 (448.5 KB) Interrupt:21 Base address:0xa000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:28 errors:0 dropped:0 overruns:0 frame:0 TX packets:28 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1600 (1.6 KB) TX bytes:1600 (1.6 KB) ppp0 Link encap:Point-to-Point Protocol inet addr:92.229.42.177 P-t-P:213.191.64.59 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 RX packets:2794 errors:0 dropped:0 overruns:0 frame:0 TX packets:2741 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:2476277 (2.4 MB) TX bytes:381240 (381.2 KB)

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• Tor check failed though Vidalia shows green onion

  - by Wolter Hellmund

  I have installed tor successfully and Vidalia shows it is running without problems; however, when I check if I am using tor in this website I get an error message saying I am not using tor. I have tried two things to fix this: I installed ProxySwitchy on Google Chrome, and created a profile for Tor (with address 127.0.0.1, port 8118), but enabling the proxy doesn't change the results in the tor check website linked before. I changed my network proxy settings through System Settings Network from None to Manual, and selected as address always 127.0.0.1 and as port 8118 for all but for the socket, for which I entered 9050 instead. This makes internet stop working completely. How can I fix this problem?

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• Creating properly aligned partitions on a replacement disk

  - by Marius Gedminas

  I've a typical small office server with two hard disks configured for RAID-1 (mirroring). Each disk has several partitions: one for swap, the others paired in several /dev/mdX arrays. Every couple of years one of the disks dies and is replaced. The replacement typically goes something like this: # copy partition table from the remaining good disk to the empty replacement disk # (instead of /dev/good_disk and /dev/new_disk I use /dev/sda and /dev/sdb, as appropriate) sfdisk -d /dev/good_disk | sfdisk /dev/new_disk # install boot loader grub-install /dev/new_disk # create swap partition reusing the same UUID, so I don't need to edit /etc/fstab mkswap /dev/new_disk1 -U xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx # hot-add the new partitions to my RAID arrays mdadm /dev/md0 -a /dev/new_disk2 mdadm /dev/md1 -a /dev/new_disk5 mdadm /dev/md2 -a /dev/new_disk6 mdadm /dev/md3 -a /dev/new_disk7 mdadm /dev/md4 -a /dev/new_disk8 The disks were originally partitioned with cfdisk back in 2009, and so the partition table is aligned traditionally to cylinder boundaries (255 heads * 63 sectors). This is not the optimum configuration for new 4K-sector drives. My question is: how can I create a set of partitions for the new disk and ensure they're properly aligned, and have correct sizes for my RAID arrays (rounding up is acceptable, I suppose, but rounding down is definitely not)?

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• Xubuntu dual monitor broke display

  - by Arman yaraee

  After I used Settings Display to enable my second monitor, my first display is not working anymore either. So I enabled both, then clicked save configuration since it was working and boom it crashed. Now when I start up, I can see the screen which I type my password but it goes black after that! When I boot into recovery mode it works fine but in Settings Display I don't see HDMI at all to disable it. Is there anyway to restore all display setting to default? (I can Ctrl+ALT+F1 and type commands but xrandr returns no results over there) EDIT I should clarify that system bios is set to laptop display

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• How do I align my partition table properly?

  - by Jorge Castro

  I am in the process of building my first RAID5 array. I've used mdadm to create the following set up: root@bondigas:~# mdadm --detail /dev/md1 /dev/md1: Version : 00.90 Creation Time : Wed Oct 20 20:00:41 2010 Raid Level : raid5 Array Size : 5860543488 (5589.05 GiB 6001.20 GB) Used Dev Size : 1953514496 (1863.02 GiB 2000.40 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 1 Persistence : Superblock is persistent Update Time : Wed Oct 20 20:13:48 2010 State : clean, degraded, recovering Active Devices : 3 Working Devices : 4 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 64K Rebuild Status : 1% complete UUID : f6dc829e:aa29b476:edd1ef19:85032322 (local to host bondigas) Events : 0.12 Number Major Minor RaidDevice State 0 8 16 0 active sync /dev/sdb 1 8 32 1 active sync /dev/sdc 2 8 48 2 active sync /dev/sdd 4 8 64 3 spare rebuilding /dev/sde While that's going I decided to format the beast with the following command: root@bondigas:~# mkfs.ext4 /dev/md1p1 mke2fs 1.41.11 (14-Mar-2010) /dev/md1p1 alignment is offset by 63488 bytes. This may result in very poor performance, (re)-partitioning suggested. Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=16 blocks, Stripe width=48 blocks 97853440 inodes, 391394047 blocks 19569702 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=0 11945 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848 Writing inode tables: ^C 27/11945 root@bondigas:~# ^C I am unsure what to do about "/dev/md1p1 alignment is offset by 63488 bytes." and how to properly partition the disks to match so I can format it properly.

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• How to recover unavailable memory in /dev/shm

  - by Alain Labbe

  Good day to all, I have a question regarding the use of /dev/shm. I use it as a temporary folder for large files to speed up processing and save IO off the HD. My problem is that some of my scripts sometimes require "forceful" interruption for a variety of reasons. I can then manually remove the files left over in /dev/shm but the memory is not returned to available space (as seen by df -h). Is there any way to recover the memory without restarting the system? I'm using LTS12.04 and most of the scripts are PERL running system call on C programs (bioinformatics tools). Thanks.

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• Overwrite previous output in Bash instead of appending it

  - by NES

  For a bash timer i use this code: #!/bin/bash sek=60 echo "60 Seconds Wait!" echo -n "One Moment please " while [ $sek -ge 1 ] do echo -n "$sek " sleep 1 sek=$[$sek-1] done echo echo "ready!" That gives me something like that One Moment please: 60 59 58 57 56 55 ... Is there a possibility to replace the last value of second by the most recent so that the output doesn't generate a large trail but the seconds countdown like a real time at one position? (Hope you understand what i mean :))

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• FGLRX installation without main monitor

  - by Chris

  This is a spiritual follow up to this I am doing some modern OpenGL tutorials and I have found that MESA does not support openGL 3.0+, so I need to get back to FGLRX even if its given me grief in the past. Every time I have tried to install FGLRX drivers I generally get thrown to the terminal and have to do some recovery, etc. before I can get them to work. Problem is, now that my main monitor is borked, when I install FGLRX drivers I cannot boot to terminal. Question: How do I back up my current windowing so that when I (inevitably) lost my boot due to FGLRX installation, I can recover it with a livecd without reinstalling, and how can I install it without a main monitor?

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• Lenovo G580 video driver does not work

  - by Evgeniy

  I have trouble with video driver. In my laptop, I have 2 video cards: GeForce 630M and Intel HD 4000 Series. I installed 12.04, it starts in Unity 2D mode, I try to install drivers to both video cards, but results inefficiencies. Nvidia control panel propose me to create xorg config file manually, but after this screen resolution resets to 640x480 and I can't get it back to normal mode. Please, help me if this is possible.

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• Synaptics error "no touchpad found" at startup on HP laptop

  - by Sandra

  I know there are a lot of topics on the synaptics touchpad not working, but I can't seem to find the answer to my problem anywhere. Please forgive me if I missed it. Here is what happened. After using the "ambient light" F11 key on my HP laptop (Compaq nc8430), the touchpad was disabled and I couldn't get it to work. Then I found this thread : "Synaptic touchpad on laptop not working". And Salem's answer totally solved my problem, both for the session fix and for the permanent fix. But since then, after each reboot I get the same error pop-up, with the following content: No touchpad found. No touchpad was found in this system. If the system has a touchpad, please make sure that the synaptics driver is properly installed and configured. If your touchpad is not found, though the driver is installed and configured correctly, please compile detailed information about your touchpad hardware and report this issue to the issue tracker. Needless to say, the driver is indeed installed, activated and configured (even though it's kind of useless now, since I guess the .conf file I created is doing all the work). I know it's a minor issue, because the touchpad does work properly, but it's getting really annoying... So, could anyone please help me fix this error pop-up problem ? Thank you !

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• Purple line on left side of screen when I use graphics card's hdmi port

  - by fab

  My graphics card is a nVidia GeForce GTX 660 2GB. When I plug HDMI into mobo it works fine. When I plug it into the graphics card (with 2nd monitor too) it shows a purple vertical line on the left side. It adds 2 pixels to the width and I can't adjust it with my monitor. It doesn't come up when I print screen. I tried changing the driver to the binary one (at the top) but that made it not show up at all. What do I do? Are some graphics cards just not compatible?

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• Laptop battery fails to change unless power level very low, and then dicharges quickly

  - by dana

  I've had my laptop for about 5-6 weeks. Its a DELL Alienware M15x and I have never replaced the battery,such as http://www.pcbatteria.com/dell-alienware-m15x-series.html. The past 3 weeks or so the battery can only charge when the computer is off or in a low power state. If its on and plugged in it will still lose its charge unless its already at 100%. On a full charge without being plugged in it only holds its charge for about 1 hour on "power saver". This makes it extremely hard to use it as a portable device so i'm trying to find a way to troubleshoot the problem without having to buy a new battery or laptop. Unfortunately I need it for the next few months in some of my classes so its kind of urgent. Thanks for your help!

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• Why Clonezilla needs to reinstall grub?

  - by Pablo

  By default CloneZilla Live will reinstall grub after restore. In my particular case I am restoring a disk image to same phisical disk without any partitioning/size change. I am expecting to have exact same state as I had right after backup. However, reinstalling grub will render my system to unbootable. If I remove that option [-g] then everything is fine. My question is in what cases and why CloneZilla ever need to re-install grub when restoring disk image?

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• 11.04 radeon screen tearing oddity

  - by Kevin Qiu

  I have a mobility radeon 5850 running 11.04 and am running catalyst 11.10 drivers. I noticed that whenever I have two windows open, one of top of the other, scrolling results in minor screen tearing, usually around the border of the window on the bottom. When I minimize or close the bottom the tearing goes away. I have tear free desktop enabled and tried looking for this specific issue but couldn't find anyone else with it. It happens in both Unity and Classic. Is there any fix for this?

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• Pgagent startup script (under the postgres user)

  - by Dominique Guardiola

  Hello, I'm trying to make a clean startup script for pgagent I found one here but I don't see how I can change this : if start-stop-daemon --start --quiet --pidfile /var/run/pgagent.pid \ --exec /usr/bin/pgagent "hostaddr=127.0.0.1 dbname=postgres user=postgres \ password=XXXXXXX";then to launch something like this : su - postgres -c /usr/bin/pgagent "hostaddr=127.0.0.1 dbname=postgres user=postgres" in order to avoid to hard-code the PG password in the script. This is possible using the .pgpass file feature. It works when I'm logged under the postgres user. So my only problem left is how to launch this command under the postgres user tried to add --user=postgres in the call, like mentioned here but it does not work.

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• Blue people on flash videos (Youtube, Vimeo, etc...)

  - by Luis Alvarado

  After a recent update I am seeing EVERYONE in any video blue. Only the people are blue. First I was thinking it was an April Fools joke about the song Blue from Eiffel 65 but it has been 4 days already. I tested on another 2 PCs, same problem. It started about a week ago I think. I am using Flash 11.2.202.228 with Firefox 11. The problem is not there if I use Google Chrome. In Chrome the Flash Player is 11.2.31.118

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• No space on device

  - by user170810

  Today I tried to move a huge directory to a common directory for 2 users. I first tried to change the permissions of my home directory. So something happened with my ~/.private directory and the disk was full! I have a 2 TB disk. I cannot make a backup, I cannot even enter graphics mode. Please help. Are there a way to restore my contents without making backup? Even creating ~/Private is impossible -- "no space on the device". I have no Private, and don't tell me that I have erased it, because it is not true. Are there some utilities to restore the files and make them not encrypted?

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• Prevent SyncTeX from opening new instance Evince?

  - by Kris

  I'm using the SyncTeX plugin in gedit and it seems that ctrl-clicking in gedit (forward-searching) opens up a new instance of Evince even if there was already an instance open. Is there a way to prevent this from happening? The SyncTeX forward search clearly calls evince in a way that is not the same as e.g. nautilus would. By the way, I compile my tex files with a script using the "external tools" plugin. The line that opens the pdf file uses xdg-open.

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• How can I restore a corrupted Shotwell db?

  - by Yann Dìnendal

  While I was importing photos from a SD card in Shotwell, my laptop has crashed (shutdown because of over-heating). Now, I can no longer launch Shotwell: $ shotwell ** ERROR:x86_64-linux-gnu/db/VersionTable.c:104:version_table_construct: assertion failed: (res == SQLITE_OK) If I move the .db file ~/.shotwell/data/photo.db elsewhere so it is no longer present (but backed-up), shotwell will launch, but will rebuild its library, which will be empty. I can re-import the folders shotwell creates, but I lose nearly all meta-data (most importantly the "folders", or events, and their main picture) Is there a way to repair/rebuild/restore photo.db? How can I see what's inside? how bad it's damaged? Or is there another way to get back my events and imports?

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• How to start up rsyslog automatically?

  - by Enrique Videni

  Check current status of rsyslog $ chkconfig --list rsyslog rsyslog 0:off 1:off 2:off 3:off 4:off 5:off 6:off Start up rsyslog at some levels $ sudo chkconfig --level 35 rsyslog on It outputs these information: insserv: warning: script 'plymouth-stop' missing LSB tags and overrides insserv: Default-Start undefined, assuming empty start runlevel(s) for script `plymouth-stop' insserv: Default-Stop undefined, assuming empty stop runlevel(s) for script `plymouth-stop' The script you are attempting to invoke has been converted to an Upstart job, but lsb-header is not supported for Upstart jobs. insserv: warning: script 'failsafe-x' missing LSB tags and overrides insserv: Default-Start undefined, assuming empty start runlevel(s) for script `failsafe-x' insserv: Default-Stop undefined, assuming empty stop runlevel(s) for script `failsafe-x' The script you are attempting to invoke has been converted to an Upstart job, but lsb-header is not supported for Upstart jobs. insserv: warning: script 'udevtrigger' missing LSB tags and overrides insserv: Default-Start undefined, assuming empty start runlevel(s) for script `udevtrigger' Check current status of rsyslog again $ chkconfig --list rsyslog rsyslog 0:off 1:off 2:off 3:off 4:off 5:off 6:off I am a novice. Please show me how to use rsyslog from beginning.

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• Upgrade problem - "dependency problems prevent configuration of libnih-dbus1"

  - by raycho

  I have a problem with the upgrading.... When i write sudo dpkg --configure -a , this is what happens... : dependency problems prevent configuration of libnih-dbus1: libnih-dbus1 depends on libnih1 (= 1.0.3-4ubuntu9); however: Version of libnih1 on system is 1.0.3-4ubuntu2. libnih-dbus1 depends on libc6 (>= 2.3.4); however: Package libc6 is not installed. dpkg: error processing libnih-dbus1 (--configure): dependency problems - leaving unconfigured Errors were encountered while processing: libnih-dbus1 Please help

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