(gdb) bt
#0  0x0000000000429c70 in ?? ()
#1  0x0000000000429e3b in ?? ()
#2  0x000000000046b4f7 in ?? ()
#3  0x000000000046b54b in ?? ()
#4  0x000000000046bc90 in FatalError ()
#5  0x00007fd2dc4245af in intel_batch_flush (pScrn=0x1dc5a50, flushed=<value optimized out>)
    at ../../src/i830_batchbuffer.c:207
#6  0x00007fd2dc430f9e in I830BlockHandler (i=0, blockData=<value optimized out>, pTimeout=0x7fff9ba836f8,
    pReadmask=0x7db480) at ../../src/i830_driver.c:2190
#7  0x00000000005664c4 in ?? ()
#8  0x00000000004a4a20 in ?? ()
#9  0x0000000000435d00 in BlockHandler ()
#10 0x000000000045f491 in WaitForSomething ()
#11 0x0000000000430852 in ?? ()
#12 0x000000000042619a in _start ()