[Bug 28095] New: X crash with PFIFO_CACHE_ERROR. (Nouveau on Riva TNT).

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28095

           Summary: X crash with PFIFO_CACHE_ERROR. (Nouveau on Riva TNT).
           Product: DRI
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/other
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: bzipitidoo at hotmail.com


Created an attachment (id=35642)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=35642)
lernel log

System is a Pentium II with a Diamond Viper V550 (Riva TNT) card.  OS is Arch
Linux, with latest versions of Nouveau from git repositories on
freedesktop.org:

kernel 2.6.34-rc5
libdrm 2.4.20
xf86-video-nouveau 0.0.16

I have "options drm debug=1" in /etc/modprobe.d/modprobe.conf.  Acceleration is
enabled.

With this setup, X works for a few minutes and then crashes.  I was running
Firefox and lxterminal (am using lxde with openbox window manager).  The first
problem I saw was the titlebar for lxterminal was not always rendered.  Grabbed
the graphics from the web page behind it.  The crash happened when I tried to
search for something in Firefox's search dialog at the upper left.  Went into a
loop in which the pop up menu of suggested search terms flickered on and off
perhaps 10 times, then X crashed.  Saw many of these messages in kernel.log:

[drm] nouveau 0000:01:00.0: PFIFO_CACHE_ERROR - Ch 
15/5 Mthd 0x0638 Data 0x00dcdad5

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