[Bug 62681] New: linux-3.12.0 rc3 nouveau: screen corruption after resume

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=62681

            Bug ID: 62681
           Summary: linux-3.12.0 rc3 nouveau: screen corruption after
                    resume
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.12
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: richcoe2@gmail.com
        Regression: Yes

Created attachment 110381
  --> https://bugzilla.kernel.org/attachment.cgi?id=110381&action=edit
shows display corruption

I had this issue on linux-3.12.0-rc2 and thought it had been fixed
in linux-3.12.0-rc3, but it just happened again.

I dock my laptop after using it for two days undocked.
The resume is normal, and I start the netork.

I enabled the second monitor with 
    xrandr --output LVDS-1 --auto
    xrandr --output DP-2 --auto
    xrandr --output DP-2 --primary --output LVDS-1 --right-of DP-2 

Both displays are funky -- parts of windows in blocks are displayed all over,
like in the attached picture.

I attempt to switch back to one monitor  
    xrandr --output LVDS-1 --primary --output DP-2 --off 
    xrandr --fb 1600x900 

The second monitor turns off, but the primary display is still messed up.

If I stop Xorg, and it restarts, the following messages are in the kernel log
[276069.408906] nouveau E[   PDISP][0000:01:00.0] chid 1 mthd 0x0080 data
0x00000000 0x000b5080
[276247.160437] nouveau E[   PDISP][0000:01:00.0] chid 1 mthd 0x0080 data
0x00000000 0x100b5080
[276415.088799] nouveau E[   PDISP][0000:01:00.0][0xc000857d][ffff88021d083640]
channel stalled

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