Black Screen on Ubuntu
Today i tried to install Ubuntu 11.10 on HP Pavilion g6 laptop and i faced a strange problem a black screen during installation!!!
so i tried connecting it to another monitor and it did work but after installation and installing latest update and drivers the problem still exist on the main monitor :S
so after some googleing and trying deferent solutions i found out that the problem in screen brightness level, for laptop monitor the level is 0 or less "total black" which is weird, and the fn key is working in wrong way "inversed" WTH!! ,
to adjust the level you need to hit f3 without fn key :S , or find the solution the hard way by setting it in this file /etc/rc.local by adding the following line before exit 0
echo 5 > /sys/class/backlight/acpi_video0/brightness
exit 0
Where 5 is the brightness level from 0 to 10
How to fix the Ubuntu GPG Error BADSIG
If you are seeing Ubuntu GPG Error BADSIG use the one of the following methods to fix
Error Message:
W: GPG error: http://archive.canonical.com intrepid Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key
Try to run the following commands from terminal
sudo -i
apt-get clean
cd /var/lib/apt
mv lists lists.old
mkdir -p lists/partial
apt-get clean
apt-get update
Mount and Unmout ISO Files in Ubuntu
Mount ISO File
First you need to make the directory to put the ISO file into using the following command
sudo mkdir /media/isodirThen use following command
sudo mount your_image_file.iso /media/isodir/ -t iso9660 -o loopNow you should have your iso file mounted, and accessible from your desktop.
Unmount ISO File
Just use following command
sudo umount /media/isodirLinux usage share for client devices
Net Applications, a Web site analytics company, just published their April 2009 Web users survey, Market Share, and they found that "Linux usage share on client devices has surpassed 1% for the first time and we still have 99% to go and i think it can make it , thanks to some powerful distributions like Ubuntu,Fedora and OpenSUSE.
Moving from Ubuntu 8.04 to 9.04
So finally i got free time to upgrade to new Ubuntu Jaunty 9.04 , i was using Ubuntu Hardy 8.04 for long time and it was awesome but now its time to move , and here some new features i liked or noticed at first use for the new release :
- New Ext4 file system support
- Faster boot time almost 20 sec "wow" check this video
- New network manager and its way better and easier comparing to 8.04
- Nautilus 2.26.2 and tabs thing very useful
- New notification area which rocks
- The shutdown/restart/suspend options have been taken off the System main menu
- Wallpaper transformation
last thoughts :
comparing to 8.04 its way faster,better and sexier 
, and here is my desktop final look
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