Program received signal SIGABRT, Aborted.
0xffffe410 in __kernel_vsyscall ()
(gdb) bt
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7dc3c55 in *__GI_raise (sig=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xb7dc5461 in *__GI_abort () at abort.c:88
#3  0x0813703c in FatalError (f=0xb7ce639c "lockup\n") at log.c:554
#4  0xb7cbb721 in I830WaitLpRing (pScrn=0x82074d0, n=131064, timeout_millis=0)
    at i830_accel.c:150
#5  0xb7cbb970 in I830Sync (pScrn=0x82074d0) at i830_accel.c:201
#6  0xb7cc6070 in i830_stop_ring (pScrn=0x82074d0, flush=<value optimized out>)
    at i830_driver.c:1750
#7  0xb7cc612f in I830LeaveVT (scrnIndex=0, flags=0) at i830_driver.c:3014
#8  0x080b93c9 in xf86XVLeaveVT (index=0, flags=0) at xf86xv.c:1278
#9  0xb7d85819 in glxDRILeaveVT (index=0, flags=0) at glxdri.c:811
#10 0x080a9197 in AbortDDX () at xf86Init.c:1329
#11 0x08136b08 in AbortServer () at log.c:406
#12 0x08137027 in FatalError (f=0xb7ce639c "lockup\n") at log.c:552
#13 0xb7cbb721 in I830WaitLpRing (pScrn=0x82074d0, n=131064, timeout_millis=0)
    at i830_accel.c:150
#14 0xb7cbb970 in I830Sync (pScrn=0x82074d0) at i830_accel.c:201
#15 0xb7cd938a in I830EXASync (pScreen=0x8215f70, marker=0) at i830_exa.c:154
#16 0xb7ba1892 in exaWaitSync (pScreen=0xbd9) at exa.c:996
#17 0xb7ba26cb in ExaDoPrepareAccess (pDrawable=0x84b66b0, index=0)
    at exa.c:473
#18 0xb7ba5fbe in exaDoMoveInPixmap (migrate=0xb7bac2fc) at exa_migration.c:220
#19 0xb7cd8e32 in I830TexOffsetStart (pPix=0x84b66b0) at i830_exa.c:616
#20 0xb7d85938 in __glXDRIleaveServer (rendering=1 '\001') at glxdri.c:130
#21 0xb7d4edac in __glXleaveServer (rendering=0 '\0') at glxext.c:443
#22 0xb7d4f27e in __glXDispatch (client=0x83b3fd0) at glxext.c:489
#23 0x0815102e in XaceCatchExtProc (client=0x83b3fd0) at xace.c:294
#24 0x0808cbc3 in Dispatch () at dispatch.c:502
#25 0x08073e9b in main (argc=9, argv=0xbfc6bc54, envp=Cannot access memory at address 0xbe1
) at main.c:454
(gdb)