#0  0xffffe424 in __kernel_vsyscall ()
#1  0x4fa84fa0 in raise () from /lib/libc.so.6
#2  0x4fa868b1 in abort () from /lib/libc.so.6
#3  0xb7d68609 in _fence_emit_internal (bufmgr_fake=0x824b2a0)
    at intel_bufmgr_fake.c:264
#4  0xb7d6861e in dri_bufmgr_fake_wait_idle (bufmgr_fake=0x0)
    at intel_bufmgr_fake.c:633
#5  0xb7d68661 in intel_bufmgr_fake_evict_all (bufmgr=0x824b2a0)
    at intel_bufmgr_fake.c:1297
#6  0xb7d8f8ba in I830LeaveVT (scrnIndex=0, flags=0) at i830_driver.c:3566
#7  0x080a0ba9 in AbortDDX () at xf86Init.c:1300
#8  0x0812e938 in AbortServer () at log.c:406
#9  0x0812ee46 in FatalError (f=0xb7dbfa1c "lockup\n") at log.c:552
#10 0xb7d80e0d in I830WaitLpRing (pScrn=0x820c560, n=131064, timeout_millis=0)
    at i830_accel.c:155
#11 0xb7d8f5aa in i830_stop_ring (pScrn=0x820c560, flush=<value optimized out>)
    at i830.h:937
#12 0xb7d90687 in I830EnterVT (scrnIndex=0, flags=0) at i830_driver.c:3660
#13 0xb7d91a27 in I830ScreenInit (scrnIndex=0, pScreen=0x8210dc0, argc=1,
    argv=0xbfd1bd74) at i830_driver.c:3399
#14 0x0806b807 in AddScreen (pfnInit=0xb7d90850 <I830ScreenInit>, argc=1,
    argv=0xbfd1bd74) at main.c:746
#15 0x080a16c3 in InitOutput (pScreenInfo=0x81e8020, argc=1, argv=0xbfd1bd74)
---Type <return> to continue, or q <return> to quit---
    at xf86Init.c:1051
#16 0x0806bf81 in main (argc=1, argv=0xbfd1bd74, envp=0xbfd1bd7c) at main.c:358