LightDM crashes

[Guest]

Has anyone else experienced this issue? The error is semi-recoverable, I get chucked out to the login screen and can log back in again without having to reboot. It's a real pain the neck when it happens though!

[ 4006.854] (EE)
[ 4006.854] (EE) Backtrace:
[ 4006.854] (EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x7f5bdaa71ac6]
[ 4006.854] (EE) 1: /usr/bin/X (0x7f5bda8c9000+0x1ac8f9) [0x7f5bdaa758f9]
[ 4006.854] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f5bd9bef000+0xfcb0) [0x7f5bd9bfecb0]
[ 4006.854] (EE) 3: /usr/lib/x86_64-linux-gnu/libpciaccess.so.0 (0x7f5bd9e0c000+0x4c3e) [0x7f5bd9e10c3e]
[ 4006.854] (EE) 4: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (amd_xs113_int10_x_inb+0x46) [0x7f5bd733b566]
[ 4006.855] (EE) 5: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (0x7f5bd6b89000+0x7a87c5) [0x7f5bd73317c5]
[ 4006.855] (EE) 6: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (X86EMU_exec+0xa5) [0x7f5bd7324f15]
[ 4006.855] (EE) 7: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (amd_xs113_int10_xf86ExecX86int10+0x46) [0x7f5bd733c6c6]
[ 4006.855] (EE) 8: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (xf86ExecX86int10+0xd) [0x7f5bd6eaec1d]
[ 4006.855] (EE) 9: /usr/lib/xorg/modules/libvbe.so (VBESetVBEMode+0x9d) [0x7f5bd65624cd]
[ 4006.855] (EE) 10: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (0x7f5bd6b89000+0x3575a4) [0x7f5bd6ee05a4]
[ 4006.855] (EE) 11: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (atiddxVBESetConsoleMode+0x42) [0x7f5bd6ee03b2]
[ 4006.855] (EE) 12: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (xdl_xs113_atiddxFreeScreen+0x449) [0x7f5bd702b5c9]
[ 4006.855] (EE) 13: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (xdl_xs113_atiddxCloseScreen+0x26f) [0x7f5bd702aecf]
[ 4006.855] (EE) 14: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/extra-modules.dpkg-tmp/modules/drivers/fglrx_drv.so (0x7f5bd6b89000+0x81e0c6) [0x7f5bd73a70c6]
[ 4006.855] (EE) 15: /usr/bin/X (0x7f5bda8c9000+0xe6dc8) [0x7f5bda9afdc8]
[ 4006.855] (EE) 16: /usr/bin/X (0x7f5bda8c9000+0x12e864) [0x7f5bda9f7864]
[ 4006.855] (EE) 17: /usr/bin/X (0x7f5bda8c9000+0x44674) [0x7f5bda90d674]
[ 4006.855] (EE) 18: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f5bd887476d]
[ 4006.855] (EE) 19: /usr/bin/X (0x7f5bda8c9000+0x448ad) [0x7f5bda90d8ad]
[ 4006.855] (EE)
[ 4006.855] (EE) Segmentation fault at address 0x0
[ 4006.855]
Fatal server error:
[ 4006.855] Caught signal 11 (Segmentation fault). Server aborting
[ 4006.855]
[ 4006.855] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 4006.855] (EE) Please also check the log file at "/var/log/Xorg.1.log" for additional information.
[ 4006.855] (EE)
[ 4006.856] Server terminated with error (1). Closing log file.