Created attachment 72083 [details]
dmesg for boot and one suspen/resume cycle

Since 3.7-rc7 from the nouveau git, the screen of my laptop will not turn on
after resuming from suspend to RAM.

I have bisected the problem to the commit

bb49f2c0dbff280c20830a1b303844fc604a611c is the first bad commit
commit bb49f2c0dbff280c20830a1b303844fc604a611c
Author: Ben Skeggs <bskeggs@redhat.com>
Date:   Fri Nov 9 12:09:48 2012 +1000

    drm/nv50/disp: move remaining interrupt handling into core

    Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

In the current nouveau kernel git the problem still occurs, the bad commit is
14464b8cd643467cb97335eb75ea676260dd0ad8 and applies after 3.7.0.

Dmesg attached, the relevant error is probably:

[   66.285584] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x400724
[   66.285597] nouveau E[  PTHERM][0000:01:00.0] unhandled intr 0x000001e1