Pipelight Xorg backtrace.

gistfile1.txt

[  6660.281] (EE) 
[  6660.281] (EE) Backtrace:
[  6660.282] (EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x7f9800e584d6]
[  6660.282] (EE) 1: /usr/bin/X (0x7f9800ca8000+0x1b4319) [0x7f9800e5c319]
[  6660.282] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f97ffdab000+0xfbd0) [0x7f97ffdbabd0]
[  6660.282] (EE) 3: /usr/lib/xorg/modules/extensions/libglx.so (0x7f97fd87d000+0xd96c) [0x7f97fd88a96c]
[  6660.282] (EE) 4: /usr/lib/xorg/modules/extensions/libglx.so (0x7f97fd87d000+0x3c403) [0x7f97fd8b9403]
[  6660.282] (EE) 5: /usr/bin/X (0x7f9800ca8000+0x58ac1) [0x7f9800d00ac1]
[  6660.282] (EE) 6: /usr/bin/X (0x7f9800ca8000+0x4757a) [0x7f9800cef57a]
[  6660.282] (EE) 7: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f97fe9f8ea5]
[  6660.282] (EE) 8: /usr/bin/X (0x7f9800ca8000+0x478c1) [0x7f9800cef8c1]
[  6660.282] (EE) 
[  6660.282] (EE) Segmentation fault at address 0xa38
[  6660.282] 
Fatal server error:
[  6660.282] Caught signal 11 (Segmentation fault). Server aborting
[  6660.283] 
[  6660.283] (EE) 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
[  6660.283] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[  6660.283] (EE)