Backtrace:
0: /usr/bin/X(xf86SigHandler+0x79) [0x80bc549]
1: [0xffffe400]
2: /lib/libc.so.6(memcpy+0x46) [0x4fcabfd6]
3: [0x8653fa0]
4: /usr/lib/xorg/modules//libfb.so(fbBltStip+0x73) [0xb7e285a3]
5: /usr/lib/xorg/modules//libfb.so(fbPutZImage+0x157) [0xb7e2d637]
6: /usr/lib/xorg/modules//libfb.so(fbPutImage+0x2a9) [0xb7e2df69]
7: /usr/lib/xorg/modules//libxaa.so [0xb7dc776d]
8: /usr/lib/xorg/modules//libxaa.so [0xb7e0e010]
9: /usr/bin/X [0x817054d]
10: /usr/lib/xorg/modules//libxaa.so(XAAWritePixmapToCacheLinear+0x1d0) [0xb7dd6830]
11: /usr/lib/xorg/modules//libxaa.so(XAACacheTile+0x153) [0xb7dd7313]
12: /usr/lib/xorg/modules//libxaa.so [0xb7dd0d22]
13: /usr/lib/xorg/modules//libxaa.so(XAAClipAndRenderRects+0x1e9) [0xb7dcff19]
14: /usr/lib/xorg/modules//libxaa.so(XAAPolyFillRect+0x20d) [0xb7dd09dd]
15: /usr/lib/xorg/modules//libxaa.so [0xb7e0d83a]
16: /usr/bin/X [0x816eb54]
17: /usr/bin/X(miPaintWindow+0x231) [0x810a8d1]
18: /usr/bin/X(miWindowExposures+0x142) [0x810ac42]
19: /usr/bin/X(miHandleValidateExposures+0x74) [0x8122a24]
20: /usr/bin/X(MapWindow+0x360) [0x8070e90]
21: /usr/bin/X(ProcMapWindow+0x69) [0x8085529]
22: /usr/bin/X(Dispatch+0x34f) [0x8085daf]
23: /usr/bin/X(main+0x47d) [0x806b63d]
24: /lib/libc.so.6(__libc_start_main+0xe6) [0x4fc4b5d6]
25: /usr/bin/X(FontFileCompleteXLFD+0x22d) [0x806aa21]