Hello
There is a fix for your problem but you need to work a little without  
seeing a correct screen.
* In the startup screen in Ubuntu you give User and Password (with a  
corrupt screen)
* In the Ubuntu desktop screen you try to start a terminal window (It  
is not easy with a corrupt screen)
* In the terminal you give the input: sudo nautilus
* Go to /usr/share/applications and start "Screen and Graphics" (
* In "Screen and Graphics" you choose graphic driver (vesa works good  
for my A21p) and what screen you have (I use LCD)
* Now you have a correct screen and when you start the computer next  
time the screen is correct.
Good luck
Per-Olof Thureson


3 dec 2008 kl. 10.41 skrev Socrates470BC:

>
> Could not install Ubuntu 8.10 or 8.04 on my IBM Thinkpad A21p  
> Laptop.  The screen appears in three segments, I cannot see which  
> options to select, or see how to fix this.  My screen has a 1600x  
> 1200 resolution.  I also tried Centos 5.2, but this has the same  
> problem.  Even worse, I overwrote Windows 2000 and could not  
> install Windows XP SP2 as it hung halfway through "installing  
> drivers" with 35 minutes still to go!
>
> If there is a solution to this , I would certainly like to see a  
> speedy
> fix.
>
> I have updated the thinkpad BIOS to 1.11 (The latest version).
>
> The screen fills with messages like:
> [258.772014] BUG: soft lockup - CPU #0 stuck for 61s!
>
> -- 
> ThinkPad A21p - Screen Resolution Problems
> https://bugs.launchpad.net/bugs/231455
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “xorg” source package in Ubuntu: Incomplete
>
> Bug description:
> My older laptop (IBM ThinkPad A21p) ran perfectly well in Ubuntu  
> 7.10.  This laptop has an ATi Rage Mobility 128 M3 (16MB) graphics  
> chip that uses the "ati" or "r128" driver.  It has a 1600x1200,  
> 15.4" LCD and a VGA output.  When I got my 8.04 CD, I put it in and  
> booted up to a horribly scrambled mess of a display.  The screen  
> was divided up into 3 sections and it was mostly unusable because  
> you can't see anything.  I took pictures of what happened and  
> attached them to this report.  I then rebooted and used "safe  
> graphics mode", which allowed me to install it (low resolution, but  
> it didn't scramble the display).  After installing, I booted up to  
> even more screen resolution errors, as the login screen doesn't  
> show correctly (also pictured below) and it only detects 800x600 as  
> the highest resolution (also pictured).  When I attached a  
> 1280x1024 CRT monitor to the VGA port, the laptop would allow me to  
> select 1280x1024 as the maximum resolution and would display at  
> that resolution on both the CRT and the built in LCD panel (but not  
> at 1600x1200, only 1280x1024).  I unplugged the VGA monitor, logged  
> out, and logged back in and it is again stuck at 800x600.
>
> Since 800x600 is practically unusable, this bug has forced me to  
> use Windows XP on this computer, which I don't want to do.  I like  
> Ubuntu much better but with an unusable resolution it's practically  
> useless.  8.04 worked fine on all of my other PC's (including my  
> new HP dv9700t laptop), it only failed on my ThinkPad.
>