[Nouveau] [Bug 31117] New: nouveau [NV98] [mi] EQ overflowing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=31117

           Summary: nouveau [NV98] [mi] EQ overflowing
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: brandon at ifup.org
         QAContact: xorg-team at lists.x.org


Created an attachment (id=39769)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=39769)
patch to fix kernel compile error.

I am getting a variety of crashes and lockups while using the nouveau driver. I
cannot reproduce these issues with the VESA driver.

Different ways of reproducing:
1) Launch emacs -> Crash
2) Launch gnome-terminal, create new tab, drag tab to new window -> Corruption,
Lockup
3) Launch a QT app and at some random point -> Corruption, Lockup

I have tested git: I compiled nouveau kernel tree (I had to fix what looks like
a merge error, I will attach a patch), nouveau xorg driver and libdrm from git
but there was no change.

Environment:
openSUSE Factory
nVidia Corporation G98 [Quadro NVS 295]
X.Org X Server 1.9.1 Release Date: 2010-10-22
2.6.36-rc4-16-default

This appears in my Xorg during a lockup situation (see 2 and 3):
[ 18682.254] [mi] EQ overflowing. The server is probably stuck in an infinite
loop.

The Kernel printed this out too:
[13313.047866] [drm] nouveau 0000:02:00.0: nouveau_channel_free: freeing fifo 2
[13313.721961] [drm] nouveau 0000:02:00.0: Allocating FIFO number 2
[13313.737386] [drm] nouveau 0000:02:00.0: nouveau_channel_alloc: initialised
FIFO 2
[13326.050223] [drm] nouveau 0000:02:00.0: fail ttm_validate
[13326.050226] [drm] nouveau 0000:02:00.0: validate vram_list
[13326.050228] [drm] nouveau 0000:02:00.0: validate: -12

A more detailed report here:
 https://bugzilla.novell.com/show_bug.cgi?id=648726

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