Description of problem:

I've got this coredump with EXA acceleration

#0  0x0000003181a32fa5 in raise (sig=<value optimized out>)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x0000003181a34b13 in abort () at abort.c:88
#2  0x00000000004f729d in FatalError ()
#3  0x000000000047a628 in xf86SigHandler ()
#4  <signal handler called>
#5  0x00007fb6745ca8a7 in DRILock ()
   from /usr/lib64/xorg/modules/extensions//libdri.so
#6  0x00007fb673f7ea77 in I830LeaveVT (scrnIndex=<value optimized out>, 
    flags=<value optimized out>) at i830_driver.c:3149
#7  0x00000000004610bd in AbortDDX ()
#8  0x00000000004f6bb8 in AbortServer ()
#9  0x00000000004f7285 in FatalError ()
#10 0x00007fb673f74e51 in I830WaitLpRing (pScrn=0xa0c710, n=131064, 
    timeout_millis=0) at i830_accel.c:150
#11 0x00007fb673f75223 in I830Sync (pScrn=0xa0c710) at i830_accel.c:204
#12 0x00007fb672ca553c in exaWaitSync ()
   from /usr/lib64/xorg/modules//libexa.so
#13 0x00007fb672ca6b05 in ExaDoPrepareAccess ()
   from /usr/lib64/xorg/modules//libexa.so
#14 0x00007fb672ca6c08 in exaPrepareAccessReg ()
   from /usr/lib64/xorg/modules//libexa.so
#15 0x00007fb672caed39 in ExaCheckComposite ()
---Type <return> to continue, or q <return> to quit---q
 from /usr/lib64/xorg/modules//libQuit

I'll attach also some weird Xorg log file (though not from this error case -
because of another crazy bug in gdm) filled with these messages:

[mi] EQ overflowing. The server is probably stuck in an infinite loop.
[mi] mieqEnequeue: out-of-order valuator event; dropping.


Version-Release number of selected component (if applicable):
xorg-x11-server-Xorg-1.4.99.905-2.20080701.fc10.x86_64

How reproducible:
Play 3D game :)

Steps to Reproduce:
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Actual results:


Expected results:


Additional info: