https://bugs.freedesktop.org/show_bug.cgi?id=77930

Priority: medium Bug ID: 77930 Assignee: dri-devel@lists.freedesktop.org Summary: radeon regression after update to kernel 3.13.6 (stable) Severity: major Classification: Unclassified OS: Linux (All) Reporter: raziel_theripper@yahoo.com Hardware: x86-64 (AMD64) Status: NEW Version: unspecified Component: DRM/Radeon Product: DRI

Created attachment 97956 --> https://bugs.freedesktop.org/attachment.cgi?id=97956&action=edit lspci

I have an Asus X550 series laptop with an AMD APU A8-5550M. The integrated GPU is a 8550G and the dGPU is a 8670M.

After upgrading the kernel from 3.13.6 to 3.13.7 the machine becomes unbootable and it freezes(black screen, possibly X not able to start).

Setting radeon.runpm=0 at boot time doesn't help.

After doing a bisect I've found the following commit to be the problematic one:

[drm/radeon] fix runpm disabling on non-PX harder.

Also, I have to mention that the bug seems to be reproducible on similar hardware configurations, see: http://forums.gentoo.org/viewtopic-p-7529160.html