[ 31978.325] (EE)
[ 31978.325] (EE) Backtrace:
[ 31978.328] (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x7f86d0a0f5a6]
[ 31978.328] (EE) 1: /usr/bin/X (0x7f86d085c000+0x1b7709) [0x7f86d0a13709]
[ 31978.328] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f86ce522000+0x352f0) [0x7f86ce5572f0]
[ 31978.328] (EE) 3: /usr/lib/x86_64-linux-gnu/libpixman-1.so.0 (0x7f86cf656000+0x72810) [0x7f86cf6c8810]
[ 31978.328] (EE) 4: /usr/lib/x86_64-linux-gnu/libpixman-1.so.0 (0x7f86cf656000+0x5914b) [0x7f86cf6af14b]
[ 31978.328] (EE) 5: /usr/lib/x86_64-linux-gnu/libpixman-1.so.0 (pixman_fill+0x29) [0x7f86cf660ed9]
[ 31978.328] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f86cab01000+0x52af7) [0x7f86cab53af7]
[ 31978.328] (EE) 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f86cab01000+0x31f11) [0x7f86cab32f11]
[ 31978.328] (EE) 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f86cab01000+0x32105) [0x7f86cab33105]
[ 31978.329] (EE) 9: /usr/bin/X (0x7f86d085c000+0x13ed81) [0x7f86d099ad81]
[ 31978.329] (EE) 10: /usr/bin/X (0x7f86d085c000+0x540f6) [0x7f86d08b00f6]
[ 31978.329] (EE) 11: /usr/bin/X (0x7f86d085c000+0x580b7) [0x7f86d08b40b7]
[ 31978.329] (EE) 12: /usr/bin/X (0x7f86d085c000+0x5c2ab) [0x7f86d08b82ab]
[ 31978.329] (EE) 13: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f86ce542a40]
[ 31978.329] (EE) 14: /usr/bin/X (_start+0x29) [0x7f86d08a2639]
[ 31978.329] (EE)
[ 31978.329] (EE) Bus error at address 0x7f869d1afe70
[ 31978.329] (EE)
Fatal server error:
[ 31978.329] (EE) Caught signal 7 (Bus error). Server aborting
[ 31978.329] (EE)
[ 31978.329] (EE)
Please consult the The X.Org Foundation support
	 at http://wiki.x.org
 for help.
[ 31978.329] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 31978.329] (EE)
[ 31978.329] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 31978.340] (EE) Server terminated with error (1). Closing log file.