[Bug 27666] New: r300g causes Xorg segfault with compositing enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27666

           Summary: r300g causes Xorg segfault with compositing enabled
           Product: DRI
           Version: XOrg CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: mad.f3ka at gmail.com


Xorg segfaults if i try to start any 3d app (or kwin with compositing) with KMS
enabled.
Classic mesa r300 works fine (KMS enabled or disabled), but slow with KMS.

Arch Linux, 2.6.33.2, amd64.
Video is rs690 built-in.

libdrm and dri2proto from git 20100413 (there are no commits later);
mesa from git 20100415 with build options:
        --enable-glx-tls \
        --with-driver=dri \
        --enable-xcb \
        --enable-egl \
        --enable-glu \
        --enable-glut \
        --enable-glw \
        --enable-gallium \
        --enable-gallium-radeon
xf86-video-ati also from git 20100413.

r300_dri.so is a symbolic link to radeong_dri.so.

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x28) [0x45cd68]
1: /usr/bin/X (0x400000+0x59a09) [0x459a09]
2: /lib/libpthread.so.0 (0x7f722367d000+0xeef0) [0x7f722368bef0]
3: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x1ab106)
[0x7f7220142106]
4: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x1772df)
[0x7f722010e2df]
5: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x17782f)
[0x7f722010e82f]
6: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x175c54)
[0x7f722010cc54]
7: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x2a9a9)
[0x7f721ffc19a9]
8: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x18c559)
[0x7f7220123559]
9: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x18a907)
[0x7f7220121907]
10: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x18bb4b)
[0x7f7220122b4b]
11: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x18c2b3)
[0x7f72201232b3]
12: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x362aa)
[0x7f721ffcd2aa]
13: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x213b5)
[0x7f721ffb83b5]
14: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x145483)
[0x7f72200dc483]
15: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x145bf3)
[0x7f72200dcbf3]
16: /usr/lib/xorg/modules/dri/r300_dri.so (0x7f721ff97000+0x99360)
[0x7f7220030360]
17: /usr/lib/xorg/modules/extensions/libglx.so (0x7f7221996000+0xf778)
[0x7f72219a5778]
18: /usr/lib/xorg/modules/extensions/libglx.so (0x7f7221996000+0x31f03)
[0x7f72219c7f03]
19: /usr/lib/xorg/modules/extensions/libglx.so (0x7f7221996000+0x36180)
[0x7f72219cc180]
20: /usr/bin/X (0x400000+0x46194) [0x446194]
21: /usr/bin/X (0x400000+0x21aac) [0x421aac]
22: /lib/libc.so.6 (__libc_start_main+0xfd) [0x7f7222900b6d]
23: /usr/bin/X (0x400000+0x21659) [0x421659]
Segmentation fault at address 0xf012659ce

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