Description of problem:

Intel 945, up-to-date Fedora 9.

If I'm running compiz with DRI2, and attempt to use textured video (because,
well, the overlay isn't going to work), the X server immediately exits.

Backtrace is:

Breakpoint 1, exit (status=<value optimized out>) at exit.c:46
46		    &__exit_funcs->fns[--__exit_funcs->idx];
(gdb) bt
#0  exit (status=<value optimized out>) at exit.c:46
#1  0x0000000007435e78 in intelddx_batchbuffer_flush (batch=0x24b00f0)
    at intel_batchbuffer.c:178
#2  0x0000000007406a64 in I830BlockHandler (i=<value optimized out>, 
    blockData=0x0, pTimeout=0x7fffa33f6d28, pReadmask=0x7e01a0)
    at i830_driver.c:2478
#3  0x0000000000522912 in AnimCurScreenBlockHandler (screenNum=-1, 
    blockData=0x0, pTimeout=0x7fffa33f6d28, pReadmask=0x7e01a0)
    at animcur.c:199
#4  0x00000000004fb787 in compBlockHandler (i=0, blockData=0x0, 
    pTimeout=0x7fffa33f6d28, pReadmask=0x7e01a0) at compinit.c:162
#5  0x0000000000449df0 in BlockHandler (pTimeout=0x7fffa33f6d28, 
    pReadmask=0x7e01a0) at dixutils.c:383
#6  0x00000000004e8f41 in WaitForSomething (pClientsReady=0x26c0be0)
    at WaitFor.c:223
#7  0x00000000004460af in Dispatch () at dispatch.c:375
#8  0x000000000042c87d in main (argc=8, argv=0x7fffa33f6f08, 
    envp=<value optimized out>) at main.c:441

In dmesg I see:

[drm:drm_bo_modify_proposed_flags] *ERROR* Invalid buffer object rwx properties
[drm:i915_validate_buffer_list] *ERROR* error on handle validate -22

Version-Release number of selected component (if applicable):

xorg-x11-drv-i810-2.2.1-24.fc9.x86_64
mesa-libGL-7.1-0.31.fc9.x86_64
xorg-x11-server-Xorg-1.4.99.901-29.20080415.fc9.x86_64
kernel-2.6.25.3-18.fc9.x86_64
compiz-0.7.2-3.fc9.x86_64

How reproducible:

Every time

Steps to Reproduce:
1. Enable DRI2 in ServerFlags
2. Start compiz
3. Attempt to play a video (or use gstreamer-properties' 'Test' button)
  
Actual results:

X server exit()s. Nothing is logged to Xorg.log.

Expected results:

Not exiting. Also, logging whatever the error could be helpful.

Additional info:

Overlay aborts & crashes the server, but Dave says we shouldn't be offering that
anyway.