Backtrace:
0: X(xf86SigHandler+0x65) [0x476a25]
1: /lib64/libc.so.6 [0x3a38c30f30]
2: /opt/X11R7/lib64/xorg/modules/extensions//libdri.so(DRILock+0x49) [0x7f5d23da                                             9889]
3: /opt/X11R7/lib64/xorg/modules/drivers//intel_drv.so [0x7f5d23956ce8]
4: X(AbortDDX+0x88) [0x45f2c8]
5: X(AbortServer+0x18) [0x4ead58]
6: X(FatalError+0xd5) [0x4eb335]
7: /opt/X11R7/lib64/xorg/modules/drivers//intel_drv.so(I830WaitLpRing+0x165) [0x                                             7f5d2394b325]
8: /opt/X11R7/lib64/xorg/modules/drivers//intel_drv.so(I830Sync+0x1a7) [0x7f5d23                                             94b707]
9: /opt/X11R7/lib64/xorg/modules//libexa.so(exaWaitSync+0x6f) [0x7f5d230bac1f]
10: /opt/X11R7/lib64/xorg/modules//libexa.so [0x7f5d230bf7d1]
11: /opt/X11R7/lib64/xorg/modules//libexa.so [0x7f5d230bfcfa]
12: /opt/X11R7/lib64/xorg/modules//libexa.so(exaDoMigration+0x4d3) [0x7f5d230c03                                             d3]
13: /opt/X11R7/lib64/xorg/modules//libexa.so(exaPrepareAccessReg+0x4e) [0x7f5d23                                             0bbb9e]
14: /opt/X11R7/lib64/xorg/modules//libexa.so [0x7f5d230bbd3b]
15: X [0x521c8c]
16: X(ValidateGC+0x24) [0x4531e4]
17: X(miPaintWindow+0x154) [0x4c2594]
18: X(miWindowExposures+0xc0) [0x4c2930]
19: /opt/X11R7/lib64/xorg/modules/extensions//libdri.so(DRIWindowExposures+0xc0)                                              [0x7f5d23daaba0]
20: X [0x48918e]
21: X(miHandleValidateExposures+0x2b) [0x4d9b9b]
22: X(UnmapWindow+0x206) [0x432296]
23: X(DeleteWindow+0x1c) [0x4356cc]
24: X(FreeClientResources+0xc2) [0x42fa32]
25: X(CloseDownClient+0xf1) [0x4405f1]
26: X(Dispatch+0x40f) [0x445c6f]
27: X(main+0x495) [0x42d715]
28: /lib64/libc.so.6(__libc_start_main+0xf4) [0x3a38c1e074]
29: X(FontFileCompleteXLFD+0xa1) [0x42cab9]

FatalError re-entered, aborting
Caught signal 11.  Server aborting