Program received signal SIGUSR1, User defined signal 1.
[Switching to Thread 0xb7bd36c0 (LWP 3154)]
0x081bbc3f in damageGlyphs (op=0 '\0', pSrc=0x84dfeb8, pDst=0x850ff68,
    maskFormat=0x82b31f0, xSrc=0, ySrc=0, nlist=1, list=0xbff36e78,
    glyphs=0xbff36a78) at damage.c:606
606     {
(gdb) cont
Continuing.

Program received signal SIGUSR1, User defined signal 1.
0xb7f1d424 in __kernel_vsyscall ()
(gdb) cont
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x081e7931 in XkbEnableDisableControls (xkbi=0x180, change=542, newValues=512,
    changes=0x0, cause=0xbff362cc) at xkbUtils.c:748
748         ctrls= xkbi->desc->ctrls;
(gdb) bt
#0  0x081e7931 in XkbEnableDisableControls (xkbi=0x180, change=542,
    newValues=512, changes=0x0, cause=0xbff362cc) at xkbUtils.c:748
#1  0x081ee478 in XkbRemoveResourceClient (inDev=0x82c3fd0, id=1101004800)
    at xkbEvents.c:1038
#2  0x08087804 in CloseDevice (dev=0x82c3fd0) at devices.c:603
#3  0x08087882 in CloseDownDevices () at devices.c:625
#4  0x0822631b in AbortServer () at log.c:405
#5  0x08226694 in FatalError (f=0xb7a8c7f4 "lockup\n") at log.c:552
#6  0xb7a3ca43 in I830WaitLpRing (pScrn=0x8283320, n=131064,
    timeout_millis=2000) at i830_accel.c:150
#7  0xb7a3ce13 in I830Sync (pScrn=0x8283320) at i830_accel.c:204
#8  0xb7a7058a in I830EXASync (pScreen=0x82af358, marker=0) at i830_exa.c:154
#9  0xb793d8fb in exaWaitSync (pScreen=0x82af358) at exa.c:806
#10 0xb793cc2f in exaPrepareAccess (pDrawable=0x8514388, index=0) at exa.c:352
#11 0xb7941c45 in exaCopyDirtyToFb (pPixmap=0x8514388) at exa_migration.c:223
#12 0xb7941f4a in exaMoveInPixmap (pPixmap=0x8514388) at exa_migration.c:345
#13 0xb7942897 in exaDoMigration (pixmaps=0xbff36620, npixmaps=3, can_accel=1)
    at exa_migration.c:626
#14 0xb7943dd6 in exaTryDriverComposite (op=3 '\003', pSrc=0x84917a8,
    pMask=0x8442f80, pDst=0x848daa0, xSrc=1, ySrc=-12, xMask=0, yMask=0,
    xDst=442, yDst=586, width=9, height=12) at exa_render.c:391
#15 0xb7944f83 in exaComposite (op=3 '\003', pSrc=0x84917a8, pMask=0x8442f80,
    pDst=0x848daa0, xSrc=1, ySrc=-12, xMask=0, yMask=0, xDst=28, yDst=258,
    width=9, height=12) at exa_render.c:709
#16 0xb794680e in exaGlyphs (op=3 '\003', pSrc=0x84917a8, pDst=0x848daa0,
    maskFormat=0x0, xSrc=0, ySrc=0, nlist=0, list=0xbff36e78,
    glyphs=0xbff36a7c) at exa_render.c:1254
#17 0x081bbf1a in damageGlyphs (op=3 '\003', pSrc=0x84917a8, pDst=0x848daa0,
    maskFormat=0x82b31f0, xSrc=0, ySrc=0, nlist=1, list=0xbff36e78,
    glyphs=0xbff36a78) at damage.c:658
#18 0x0819e9c3 in CompositeGlyphs (op=3 '\003', pSrc=0x84917a8,
    pDst=0x848daa0, maskFormat=0x82b31f0, xSrc=0, ySrc=0, nlist=1,
    lists=0xbff36e78, glyphs=0xbff36a78) at picture.c:1785
#19 0x081a2548 in ProcRenderCompositeGlyphs (client=0x84684c0) at render.c:1403
#20 0x081a407b in ProcRenderDispatch (client=0x84684c0) at render.c:2002
#21 0x0818ea90 in XaceCatchExtProc (client=0x84684c0) at xace.c:299
#22 0x0808babf in Dispatch () at dispatch.c:502
#23 0x080747c4 in main (argc=9, argv=0xbff37774, envp=0xbff3779c) at main.c:452
(gdb)