Public bug reported:
Most notably during shutdown: the screen becomes vertical (sometimes
horzontal) lines of random colored pixels and the system hangs. Using
ctrl+alt+r e i s u b can generally reboot. Otherwise shutting down the
laptop requires a hard shutdown holding the power button for about five
seconds.
This problem is also triggered with ctrl+alt+f1, or if the processor
nears a critical temperature and computer immediately attempts shutdown
sequence.
The nexus of the issue was during a double upgrade from intrepid 8.10 to
jaunty 9.04 to karmic 9.10. While troubleshooting, I also completed the
upgrade to grub2. My initial intuition, which is still holding out, is
that there are some display driver changes that need to take place.
Might you see something that could resolve this system hang and fix
display issues?
If more info would help, share commands for fastest response.
** Affects: xserver-xorg-video-ati (Ubuntu)
Importance: Undecided
Status: New
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ubuntu 9.10 screen displays colored pixel garbage and system hangs on shutdown
https://bugs.launchpad.net/bugs/505213
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