[Nouveau] [Bug 48954] New: nv25 PGRAPH error and X freeze

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=48954

             Bug #: 48954
           Summary: nv25 PGRAPH error and X freeze
    Classification: Unclassified
           Product: xorg
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: noviktor at seznam.cz
         QAContact: xorg-team at lists.x.org


Created attachment 60373
  --> https://bugs.freedesktop.org/attachment.cgi?id=60373
Kernel log from boot to error on nv25

I am running nouveau git kernel 3.4.0-rc2-g965a47f, xf86-video-nouveau ver.
fb3a36b and xorg-server 1.12.0 on nv25 card and I am getting PGRAPH erros

nouveau 0000:01:00.0: PGRAPH - ERROR nsource: LIMIT_COLOR nstatus:
PROTECTION_FAULT
nouveau 0000:01:00.0: PGRAPH - ch 1/4 class 0x009f mthd 0x0308 data 0x00240771

X then freezes but ssh or SysRq works. Additionally some icons on Gnome 3
fall-back mode have white rectangle in background instead of being transparent.
Didn't happen before libdrm rewrite.
Fastest way to reproduce seems to be right clicking to open pop-up menu or
opening drop-down selections - error happens in a few attempts.
On nv11 it seems not to crash, but some icons still have white background.

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