Comment 2 for bug 1907142

Looks like the issue is:

[ 15285.452] (EE) Backtrace:
[ 15285.453] (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x13c) [0x55b0f2a4952c]
[ 15285.455] (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x60) [0x7f1c35a1241f]
[ 15285.458] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (gsignal+0xcb) [0x7f1c3584f18b]
[ 15285.462] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (abort+0x12b) [0x7f1c3582e859]
[ 15285.465] (EE) unw_get_proc_name failed: no unwind info found [-10]
[ 15285.465] (EE) 4: /usr/lib/x86_64-linux-gnu/dri/iris_dri.so (?+0x0) [0x7f1c33a4d3a9]
[ 15285.466] (EE) 5: /usr/lib/x86_64-linux-gnu/dri/iris_dri.so (nouveau_drm_screen_create+0x2038c7) [0x7f1c346405f7]
[ 15285.468] (EE) 6: /usr/lib/x86_64-linux-gnu/dri/iris_dri.so (__driDriverGetExtensions_zink+0x24f35) [0x7f1c33a9d6a5]
[ 15285.470] (EE) 7: /usr/lib/x86_64-linux-gnu/dri/iris_dri.so (__driDriverGetExtensions_zink+0x24fa4) [0x7f1c33a9d7a4]
[ 15285.472] (EE) unw_get_proc_name failed: no unwind info found [-10]
[ 15285.472] (EE) 8: /usr/lib/xorg/modules/drivers/modesetting_drv.so (?+0x0) [0x7f1c36368c90]
[ 15285.474] (EE) unw_get_proc_name failed: no unwind info found [-10]
[ 15285.474] (EE) 9: /usr/lib/xorg/modules/drivers/modesetting_drv.so (?+0x0) [0x7f1c3636b8f0]
[ 15285.474] (EE) 10: /usr/lib/xorg/Xorg (BlockHandler+0xa5) [0x55b0f28ec995]
[ 15285.475] (EE) 11: /usr/lib/xorg/Xorg (WaitForSomething+0x122) [0x55b0f2a42ba2]
[ 15285.475] (EE) 12: /usr/lib/xorg/Xorg (SendErrorToClient+0x117) [0x55b0f28e7cf7]
[ 15285.476] (EE) 13: /usr/lib/xorg/Xorg (InitFonts+0x3b4) [0x55b0f28ebfc4]
[ 15285.479] (EE) 14: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0x7f1c358300b3]
[ 15285.479] (EE) 15: /usr/lib/xorg/Xorg (_start+0x2e) [0x55b0f28d5a2e]