[ 10040.764] (EE) 
[ 10040.764] (EE) Backtrace:
[ 10040.827] (EE) 0: /usr/bin/X (xorg_backtrace+0x49) [0x7f9a40bd3339]
[ 10040.827] (EE) 1: /usr/bin/X (0x7f9a40a28000+0x1af3a9) [0x7f9a40bd73a9]
[ 10040.827] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f9a3e730000+0x35480) [0x7f9a3e765480]
[ 10040.827] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (0x7f9a3e730000+0x908be) [0x7f9a3e7c08be]
[ 10040.827] (EE) 4: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7f9a39670000+0x144d2e) [0x7f9a397b4d2e]
[ 10040.827] (EE) 5: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7f9a39670000+0x14a0f0) [0x7f9a397ba0f0]
[ 10040.827] (EE) 6: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7f9a39670000+0x14a2a2) [0x7f9a397ba2a2]
[ 10040.827] (EE) 7: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7f9a39670000+0x19ead2) [0x7f9a3980ead2]
[ 10040.827] (EE) 8: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7f9a39670000+0x134ff7) [0x7f9a397a4ff7]
[ 10040.827] (EE) 9: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7f9a39670000+0x138d2f) [0x7f9a397a8d2f]
[ 10040.827] (EE) 10: /usr/lib/xorg/modules/libglamoregl.so (0x7f9a3a9f8000+0x29efe) [0x7f9a3aa21efe]
[ 10040.827] (EE) 11: /usr/lib/xorg/modules/libglamoregl.so (0x7f9a3a9f8000+0x2aba6) [0x7f9a3aa22ba6]
[ 10040.827] (EE) 12: /usr/lib/xorg/modules/libglamoregl.so (0x7f9a3a9f8000+0x2b7f4) [0x7f9a3aa237f4]
[ 10040.827] (EE) 13: /usr/lib/xorg/modules/libglamoregl.so (0x7f9a3a9f8000+0x84cd) [0x7f9a3aa004cd]
[ 10040.828] (EE) 14: /usr/bin/X (0x7f9a40a28000+0xac8f8) [0x7f9a40ad48f8]
[ 10040.828] (EE) 15: /usr/bin/X (0x7f9a40a28000+0xf444e) [0x7f9a40b1c44e]
[ 10040.828] (EE) 16: /usr/bin/X (0x7f9a40a28000+0x55ee7) [0x7f9a40a7dee7]
[ 10040.828] (EE) 17: /usr/bin/X (0x7f9a40a28000+0x59f16) [0x7f9a40a81f16]
[ 10040.828] (EE) 18: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f9a3e751b45]
[ 10040.828] (EE) 19: /usr/bin/X (0x7f9a40a28000+0x4549e) [0x7f9a40a6d49e]
[ 10040.828] (EE) 
[ 10040.828] (EE) Segmentation fault at address 0x7f9a2b8b501a
[ 10040.828] (EE) 
Fatal server error:
[ 10040.828] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 10040.828] (EE) 
[ 10040.828] (EE)