Backtrace:
0: /usr/lib/xorg/Xorg (OsLookupColor+0x13c) [0x56427bf2b5ac]
1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x60) [0x7fdff324941f]
2: /lib/x86_64-linux-gnu/libc.so.6 (gsignal+0xcb) [0x7fdff308618b]
3: /lib/x86_64-linux-gnu/libc.so.6 (abort+0x12b) [0x7fdff3065859]
unw_get_proc_name failed: no unwind info found [-10]
4: /lib/x86_64-linux-gnu/libc.so.6 (?+0x0) [0x7fdff306571a]
5: /lib/x86_64-linux-gnu/libc.so.6 (__assert_fail+0x46) [0x7fdff3076f36]
unw_get_proc_name failed: no unwind info found [-10]
6: /usr/lib/xorg/modules/drivers/amdgpu_drv.so (?+0x0) [0x7fdff29ff2d0]
unw_get_proc_name failed: no unwind info found [-10]
7: /usr/lib/xorg/modules/drivers/amdgpu_drv.so (?+0x0) [0x7fdff29ff4d0]
unw_get_proc_name failed: no unwind info found [-10]
8: /usr/lib/xorg/modules/drivers/amdgpu_drv.so (?+0x0) [0x7fdff2a0d750]
unw_get_proc_name failed: no unwind info found [-10]
9: /usr/lib/xorg/modules/drivers/amdgpu_drv.so (?+0x0) [0x7fdff2a10630]
10: /usr/lib/xorg/Xorg (MapWindow+0x20c) [0x56427bdf60fc]
11: /usr/lib/xorg/Xorg (InitFonts+0x355) [0x56427bdcdf65]
12: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0x7fdff30670b3]
13: /usr/lib/xorg/Xorg (_start+0x2e) [0x56427bdb7a2e]


Caught signal 6 (Aborted). Server aborting


Please also check the log file at "/var/log/Xorg.0.log" for additional information.

Server terminated with error (1). Closing log file.