Random system lockup with KMS, Mobility Radeon HD3470
Submitted by Jaime Velasco Juan
Assigned to Default DRI bug account
Description
Created attachment 42685
kernel log
The computer often locks itself, the panel suddenly loses the image (it sometimes blooms, or get filled with a solid color or a pattern of vertical white and grey stripes). I don't know how to trigger the bug, it can happen anytime, even with an idle system.
It has happened to me since I started using KMS, it was stable both with radeonHD and radeon drivers in UMS mode. The frequency of the problem has varied a lot; with the first KMS versions it happened a lot, then it seemed to be fixed with some kernel versions, but reappeared with others... As the problem is random, it can happen after a few minutes of uptime, or after some hours, or not happen at all.
At first, I thougth the kernel was completely dead, but I recently found out that I can use SysRq+S and SysRq+T to get some logs. If I try to reboot with SysRq+B the system locks fully and doesn't react to anything, I always have to do a hard reboot.
I'll attach lspci, one X log and three differen kernel logs.
Attachment 42685, "kernel log":
kern.1.log