https://bugs.freedesktop.org/show_bug.cgi?id=33681

Summary: Random system lockup with KMS, Mobility Radeon HD3470 Product: DRI Version: XOrg CVS Platform: x86-64 (AMD64) OS/Version: All Status: NEW Severity: normal Priority: medium Component: DRM/Radeon AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: jsagarribay@gmail.com

Created an attachment (id=42685) --> (https://bugs.freedesktop.org/attachment.cgi?id=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.