[Nouveau] [Bug 59057] New: Black screen after resume from s2ram

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59057

          Priority: medium
            Bug ID: 59057
          Assignee: nouveau at lists.freedesktop.org
           Summary: Black screen after resume from s2ram
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: pontus.fuchs at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/nouveau
           Product: xorg

Starting with 3.8rc1 I get a black screen when resuming after suspend. 
The kernel is alive because I can switch to VT1 and reboot with 
ctrl-alt-delete.

I bisected the problem down to this commit:

186ecad21: drm/nv50/disp: move remaining interrupt handling into core

Hardware is 8400M GS (10de:0427) in a Dell XPS M1330.

I see this in my kernel log after resume:

nouveau E[     PFB][0000:01:00.0] trapped read at 0x002001a020 on 
channel 0x00007b23 SEMAPHORE_BG/PFIFO_READ/00 reason: PAGE_NOT_PRESENT
nouveau E[    1177] failed to idle channel 0xcccc0000
[TTM] Failed to expire sync object before buffer eviction
[TTM] Failed to expire sync object before buffer eviction
[TTM] Failed to expire sync object before buffer eviction

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