Ceci est une ancienne révision du document !
Q My computer boots to a black screen, what can I do?
A I've dealt with this before, but not this well: http://askubuntu.com/questions/162075/my-computer-boots-to-a-black-screen-what-options-do-i-have-to-fix-it
Q I have audio issues. Using Google produces far too many “fixes,” and most of them are obsolete.
A http://voices.canonical.com/david.henningsson/2012/07/13/top-five-wrong-ways-to-fix-your-audio
The author provides alternatives to the obsolete approaches. My favorite: “model=auto”.
Q I installed Ubuntu on a small hard drive, and now it's out of space. I managed to add a somewhat larger hard drive, what can I do now?
A (Thanks to OM55 in the Ubuntu Forums) You can clone the existing installation to the larger hard drive, using Image for Linux. http://www.terabyteunlimited.com/image-for-linux.htm
When done, you can mount the old (smaller) drive as additional available disk space for your new drive.
Q When you have two monitors, and you enable: System Settings > Appearance > Behavior > Auto-hide the Launcher, your mouse will stick within the Unity hot spot region until you wiggle your mouse free.
A (Thanks to ResQue in the Ubuntu forums) Go into System Settings > Displays and set the following:
Launcher placement = Laptop (this will stop the unity bar appearing on both screens)
Sticky edges = Off (this will stop the mouse cursor getting stuck between screens.)
Q How do you convert AVCHD video file (MTS) to MP4 or WMV?
A Install Winff and run it. You will probably want to do some reading about quality settings; if you get carried away, you can produce enormous files.
Q Where can I find an Intel 64-bit distro?
A Distros labelled as “AMD 64” are 64-bit distros for both AMD and Intel processors.
Q How do you crop a video in openshot?
A http://www.openshotusers.com/help/1.3/en/ar01s15.html
Q I currently have a dual boot set-up with Windows Vista Business and Ubuntu 10.04. The Windows Vista OS is now crashing pretty well every time I use it. I have decided to re-install the Windows Vista (which I need for my work) using 2 Recovery DVD disks that I created back in 2009 when I got the (Toshiba Satellite Pro) laptop. When I do that, I've been led to believe that the laptop will stop recognising the Linux OS?
A (Thanks to darkod in the Ubuntu Forums) Installing Windows will delete the grub2 bootloader from the MBR and the Windows bootloader can't boot Linux. If the recovery process only installs Vista on the current partition, not touching the Ubuntu partitions, you can simply use the 10.04 Ubuntu cd in live mode and return grub2 to the MBR with these instructions: http://ubuntuforums.org/showthread.php?t=1014708
Q I have an annoying issue with 12.04, it keeps changing my BIOS time. I have the clock set in Ubuntu to the correct time but when I shut it down and boot back up, the BIOS clock is set a few hours off again every time. I also use Windows 7 (separate drive) and that's how I realized the BIOS time was wrong. In Windows it goes by the BIOS time.
A (Thanks to mcduck in the Ubuntu Forums) Your problem is caused by both Windows and Linux using the system clock from BIOS, but while Windows assumes the system clock is running in your local time, Linux (like most Unix-like operating systems) assumes the system clock to run in UTC time instead. To change this behaviour: https://help.ubuntu.com/community/UbuntuTime#Multiple_Boot_Systems_Time_Conflicts
Q I set up an old desktop computer with Ubuntu Server 11.10. I have two 1 TB drives set up with LVM (Logical Volume Manager, which lets you treat the two drives as a single drive), and an 8GB USB drive set up with the OS. Found out today that the USB drive failed. How can I restore the LVM?
A (Thanks again to darkod in the Ubuntu Forums) Install Ubuntu Server on a new flash drive. After installing the OS, or during installation, you can activate and mount the LVM easily. If you do it during OS installation, make sure you don't delete it. Or, simply ignore it (leave it as not used) during OS install, and create an entry in /etc/fstab after that.
Tips and Techniques Cleaning Windows
One of the things Linux users gloat about is freedom from malware. At the same time, many Linux users dual-boot in order to run Windows games. Therein lies the problem: what to do when malware invades your Windows partition?
I didn't have any malware, but I set out to answer the question.
My laptop triple-boots Windows 7, Linux Mint 13 and Ubuntu 12.04. All of them are 64-bit versions.
When I searched on the web, it appeared that the preferred method of cleaning a Windows partition was the Linux version of Avast!. When I tried to run 32-bit Avast! under Ubuntu 12.04, 64-bit version, it disgraced itself, saying, “An error occured in Avast! engine: Invalid argument”.
OK, let's try 32-bit Ubuntu. I downloaded the ISO, then installed Multisystem, which has proven to be a reliable way to make a “persistent” flash drive. (“Persistent” means that when you install something and reboot, it's still installed.) Creating the flash drive took a few minutes, and creating 4 GB of persistent space took many minutes. Fortunately, my flash drive has a blinking activity light, so I could see that something was happening.
Boot from the flash drive, beauty! Then my personal preferences came into play, which really slowed things down. First, I ran Software Center and installed Synaptic Package Manager. Ran System Settings, selected Brightness and Lock, and selected “Never” for “Turn screen off when inactive for:”. Ran Synaptic, and added Multiverse to the Repositories. Reloaded. Installed conky, lm-sensors and hddtemp, because I always want to see how hot things are. Then I made my big mistake, and installed all the updates. Running from a flash drive, that can take hours. Then:
sudo apt-get clean
to free up the space used by the downloaded updates.
Now I can install the previously downloaded Avast! .deb file. There's an error message which I ignore. Run it, and copy in the registration key which I obtained previously. Update the database, and here comes the same error message. Argh!
This can't be right. I Google:
avast invalid argument solved
and get to this page, which has the solution: http://crunchedd.com/2012/03/26/solved-an-error-occured-in-avast-engine-invalid-argument/
I applied that solution to the Ubuntu on my hard drive. Now Avast! ran, and I got to the tricky (!!!) part. I ran the file manager, and selected the Windows partition (“164 GB Filesystem” on my computer) which mounted it. In Avast! I selected to scan Selected Folders. From Root (right at the bottom of the selection screen) I selected media, and there was just one item within it: the Windows partition. I selected it, and away we went.
As expected, no malware was identified. But it shouldn't be this hard.