[Nouveau] [Bug 67161] New: Blank video after resuming from S3 or S4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67161

          Priority: medium
            Bug ID: 67161
          Assignee: nouveau at lists.freedesktop.org
           Summary: Blank video after resuming from S3 or S4
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: mauromol at tiscali.it
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

I have a Creative Labs Graphics Blaster Riva TNT video card (nv0). I'm using
nouveau.noaccel=1 kernel boot parameter to workaround bug 27211. I'm on a
derivative of Debian Sid:

Linux openmediavault 2.6.32-5-686 #1 SMP Fri May 10 08:33:48 UTC 2013 i686
GNU/Linux

The problem is this: when the system wakes up after a pm-suspend or
pm-hibernate, the system resumes fine (I can ssh to it and everything works
ok), but the screen stays blank (the monitor has the orange led, which is used
when it's in standy-by mode or no signal received).

In /var/log/messages I find the following messages which seem to be related to
nouveau:

Jul 22 12:01:54 openmediavault kernel: [   58.165951] [drm] nouveau
0000:01:00.0: We're back, enabling device...
Jul 22 12:01:54 openmediavault kernel: [   58.165958] [drm] nouveau
0000:01:00.0: POSTing device...
Jul 22 12:01:54 openmediavault kernel: [   58.232063] agpgart-intel
0000:00:00.0: AGP 2.0 bridge
Jul 22 12:01:54 openmediavault kernel: [   58.232092] agpgart-intel
0000:00:00.0: putting AGP V2 device into 2x mode
Jul 22 12:01:54 openmediavault kernel: [   58.232121] nouveau 0000:01:00.0:
putting AGP V2 device into 2x mode
Jul 22 12:01:54 openmediavault kernel: [   58.232147] [drm] nouveau
0000:01:00.0: Reinitialising engines...
Jul 22 12:01:54 openmediavault kernel: [   58.232169] [drm] nouveau
0000:01:00.0: Restoring GPU objects...
Jul 22 12:01:54 openmediavault kernel: [   58.241771] [drm] nouveau
0000:01:00.0: Restoring mode...
Jul 22 12:01:54 openmediavault kernel: [   58.310342] [drm] nouveau
0000:01:00.0: Setting dpms mode 3 on vga encoder (output 0)
[...]
Jul 22 12:01:54 openmediavault kernel: [   58.398120] [drm] nouveau
0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
Jul 22 12:01:54 openmediavault kernel: [   58.398130] [drm] nouveau
0000:01:00.0: Output VGA-1 is running on CRTC 0 using output @
[...]
Jul 22 12:35:22 openmediavault kernel: [ 2071.968039] [drm] nouveau
0000:01:00.0: Setting dpms mode 1 on vga encoder (output 0)

Please let me know if you need the full contents or /var/log/messages or any
other info that could be used to understand what the problem is.

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