Comment 1 for bug 879559

Xorg.0.log
---
[ 11764.632] 10: /lib/i386-linux-gnu/libc.so.6 (ioctl+0x19) [0xb75898c9]
[ 11764.632] 11: /usr/lib/i386-linux-gnu/libdrm.so.2 (drmIoctl+0x34) [0xb73217d4]
[ 11764.632] 12: /usr/lib/i386-linux-gnu/libdrm.so.2 (drmCommandWrite+0x3c) [0xb732431c]
[ 11764.632] 13: /usr/lib/i386-linux-gnu/libdrm_nouveau.so.1 (0xb77fc000+0x298f) [0xb77fe98f]
[ 11764.632] 14: /usr/lib/i386-linux-gnu/libdrm_nouveau.so.1 (nouveau_bo_map_range+0x10a) [0xb77ff07a]
[ 11764.632] 15: /usr/lib/i386-linux-gnu/libdrm_nouveau.so.1 (nouveau_bo_map+0x32) [0xb77ff172]
[ 11764.632] 16: /usr/lib/xorg/modules/drivers/nouveau_drv.so (0xb72e2000+0x540b) [0xb72e740b]
[ 11764.632] 17: /usr/lib/xorg/modules/libexa.so (0xb729e000+0x4299) [0xb72a2299]
[ 11764.632] 18: /usr/lib/xorg/modules/libexa.so (0xb729e000+0x820f) [0xb72a620f]
[ 11764.632] 19: /usr/lib/xorg/modules/libexa.so (0xb729e000+0x43d7) [0xb72a23d7]
[ 11764.632] 20: /usr/lib/xorg/modules/libexa.so (0xb729e000+0x452f) [0xb72a252f]
[ 11764.632] 21: /usr/bin/X (0x8048000+0xe249f) [0x812a49f]
[ 11764.632] 22: /usr/bin/X (ValidateGC+0x26) [0x8084ba6]
[ 11764.632] 23: /usr/bin/X (miPaintWindow+0x117) [0x80a1327]
[ 11764.633] 24: /usr/bin/X (miClearToBackground+0x11c) [0x81bd2dc]
[ 11764.633] 25: /usr/bin/X (0x8048000+0x259dc) [0x806d9dc]
[ 11764.633] 26: /usr/bin/X (0x8048000+0x2a117) [0x8072117]
[ 11764.633] 27: /usr/bin/X (0x8048000+0x1c70c) [0x806470c]
[ 11764.633] 28: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0xb74d9113]
[ 11764.633] 29: /usr/bin/X (0x8048000+0x1ca21) [0x8064a21]