[Bug 13740] New: X server crashes with 2.6.31-rc2 when options are changed

[<bug...@bu...>]

http://bugzilla.kernel.org/show_bug.cgi?id=13740

           Summary: X server crashes with 2.6.31-rc2 when options are
                    changed
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.31-rc2
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI)
        AssignedTo: dri...@ke...
        ReportedBy: m.s...@gm...
        Regression: Yes


Created an attachment (id=22246)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=22246)
xorg log with the crash

With 2.6.31-rc2, X server crashes each time
I change options such as anti-aliasing or
display effects with KDE
this does not happen with 2.6.30.
(Could not bisect or test rc1 as that crashes on boot for me)
attached Xorg log with crash
I'll attach dmesg and kernel config as well

Hardware: T500
Software: Xorg version is the one that ships with FC11

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