Ubuntu : Fix The Screen Messed up at Start-up and Shutdown

If you’re running Ubuntu Maverick with Nvidia Official drivers, and your screen messed up at starting up and shutting down the system. You can try following method to fix the problem.

Step 1: First, open up a terminal window from Applications -> Accessories menu. Run this command to install preparing tools:

Then, use following command to get a list of supported screen resolution modes (800×600 16bits, 1280×1024 24bits 1024×768 16bits, etc…).

Step 2: Now, let’s start editing the /etc/default/grub file:

Find following section and change it looks like this:

GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash nomodeset video=uvesafb:mode_option=1920×1200-24,mtrr=3,scroll=ywrap”
GRUB_CMDLINE_LINUX=””

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo’
#GRUB_GFXMODE=1920×1200

Here, change 1920×1200-24 (1920*12004 24bits) to yours screen resolution and it must be listed in the output of sudo hwinfo –framebuffer

Step 3: Run this command:

Add following line into the end and save it.

remember to replace 1920×1200-24

Step 4:Finally, execute following commands and then restart your machine.

Another way to fix this issue through StartUpManager