[Bug 35183] New: system freezes with 2.6.38-rc kernel and kms pageflip enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=35183

           Summary: system freezes with 2.6.38-rc kernel and kms pageflip
                    enabled
           Product: DRI
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: aaalmosss at gmail.com


The system freezes completely after a few 3d operations (like changing the
desktop in compiz a couple of times). No error message appears in dmesg or
syslog. Tried both rc7 and rc8 and the drm-radeon-testing branch. If I disable
kms pageflip in xorg.conf, the system seems stable. I also tried setting
radeon.agpmode=-1, but didn't help.

Hardware: radeon 9600xt (rv350 agp)
software: latest debian unstable (libdrm2 2.4.23, xserver-xorg 7.6,
xserver-xorg-video-radeon 6.14.0)

Considering that most distributions use compositing wm by default, and kms
pageflip is also enabled by default, this seems like a serious problem.

Bugs 21472, 34137, 34643 might be related, but I'm not sure.

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