(gdb) bt
#0  0x2833f944 in kill () from /usr/lib/libc.so.6
#1  0x28389f36 in abort () from /usr/lib/libc.so.6
#2  0x08193de5 in FatalError ()
#3  0x080b4f15 in xf86SigHandler ()
#4  0xbfbfffd8 in ?? ()
#5  0x0000000b in ?? ()
#6  0x0000000c in ?? ()
#7  0xbfbff0f0 in ?? ()
#8  0x0000000c in ?? ()
#9  0x080b4ec0 in xf86AddInputHandler ()
#10 0x0816ab79 in XkbRemoveResourceClient ()
#11 0x0807b766 in DisableDevice ()
#12 0x0807b9e4 in CloseDownDevices ()
#13 0x08193933 in AbortServer ()
#14 0x08193dcb in FatalError ()
#15 0x284e34c1 in I830WaitLpRing (pScrn=0x28429000, n=131064, timeout_millis=2000) at i830_accel.c:150
#16 0x284e36fc in I830Sync (pScrn=0x28429000) at i830_accel.c:201
#17 0x286b4b5c in XAAPolySegmentFallback () from /usr/pkg/lib/xorg/modules//libxaa.so
#18 0x286ef8be in cwPolySegment () from /usr/pkg/lib/xorg/modules//libxaa.so
#19 0x0814d90a in DamageDamageRegion ()
#20 0x0807f9a0 in ProcPolySegment ()
#21 0x0812f44d in XaceHook ()
#22 0x08082317 in Dispatch ()
#23 0x0806bd57 in main ()