Backtrace:
0: /usr/bin/X11/X(xf86SigHandler+0x7e) [0x80c660e]
1: [0xffffe420]
2: /lib/i686/cmov/libc.so.6(vsnprintf+0xb4) [0xb7d43874]
3: /usr/bin/X11/X(LogVWrite+0xb7) [0x81bac57]
4: /usr/bin/X11/X(LogVMessageVerb+0x99) [0x81bb199]
5: /usr/bin/X11/X(xf86VDrvMsgVerb+0xda) [0x80d01aa]
6: /usr/bin/X11/X(xf86DrvMsg+0x3d) [0x80d118d]
7: /usr/lib/xorg/modules/drivers//i810_drv.so [0xb7afa207]
8: /usr/lib/xorg/modules/drivers//i810_drv.so(i830_free_memory+0x24)
[0xb7afafa4]
9: /usr/lib/xorg/modules/drivers//i810_drv.so [0xb7affd87]
10: /usr/bin/X11/X [0x80d94d5]
11: /usr/lib/xorg/modules/extensions//libextmod.so(XvdiPutImage+0x178)
[0xb7bac6d8]
12: /usr/lib/xorg/modules/extensions//libextmod.so [0xb7baf546]
13: /usr/bin/X11/X [0x814d5fe]
14: /usr/bin/X11/X(Dispatch+0x2bf) [0x808d1bf]
15: /usr/bin/X11/X(main+0x48b) [0x807470b]
16: /lib/i686/cmov/libc.so.6(__libc_start_main+0xe0) [0xb7cf7450]
17: /usr/bin/X11/X(FontFileCompleteXLFD+0x205) [0x8073a81]