Description of problem:
It happened while connecting/disconnecting external monitor to the VGA socket.

Version-Release number of selected component:
xorg-x11-server-Xorg-1.12.3-2.fc17

Additional info:
libreport version: 2.0.18
abrt_version:   2.0.18
kernel:         3.6.6-1.fc17.i686.PAE

backtrace:
:0: /usr/bin/X (xorg_backtrace+0x4a) [0x80ac45a]
:1: /usr/bin/X (0x8047000+0x4535d) [0x808c35d]
:2: /usr/bin/X (0x8047000+0x4615b) [0x808d15b]
:3: /usr/bin/X (GetPointerEvents+0x117) [0x808e607]
:4: /usr/bin/X (0x8047000+0x16ecdd) [0x81b5cdd]
:5: /usr/bin/X (miPointerWarpCursor+0xdc) [0x81b60cc]
:6: /usr/bin/X (0x8047000+0x7e756) [0x80c5756]
:7: /usr/bin/X (0x8047000+0x16f59f) [0x81b659f]
:8: /usr/bin/X (0x8047000+0x1094a1) [0x81504a1]
:9: /usr/bin/X (0x8047000+0xf47c7) [0x813b7c7]
:10: /usr/bin/X (RRPointerScreenConfigured+0x86) [0x813b9a6]
:11: /usr/bin/X (RRTellChanged+0xdf) [0x813532f]
:12: /usr/bin/X (RRGetInfo+0xae) [0x8138e4e]
:13: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb753c000+0x101d6) [0xb754c1d6]
:14: /usr/bin/X (xf86Wakeup+0x15b) [0x80c9beb]
:15: /usr/bin/X (WakeupHandler+0x6e) [0x807b64e]
:16: /usr/bin/X (WaitForSomething+0x19b) [0x80a974b]
:17: /usr/bin/X (0x8047000+0x30101) [0x8077101]
:18: /usr/bin/X (0x8047000+0x1dce5) [0x8064ce5]
:19: /lib/libc.so.6 (__libc_start_main+0xf5) [0x4649e635]
:20: /usr/bin/X (0x8047000+0x1e029) [0x8065029]