Comment 3 for bug 1960868

XorgLogOld.txt is showing that Xorg crashed. If that's a recurring issue then it might explain this bug.

It looks most likely to be bug 1811023 which is also the most common Xorg crash globally for Ubuntu right now. It also seems to mostly affect Nvidia users.

Please reproduce the issue a few more times and if you keep seeing Xorg crashes like:

[ 4.932] (EE) Backtrace:
[ 4.932] (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x13c) [0x55ac57b32aec]
[ 4.933] (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x60) [0x7f2b8ea073c0]
[ 4.933] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (gsignal+0xcb) [0x7f2b8e84418b]
[ 4.933] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (abort+0x12b) [0x7f2b8e823859]
[ 4.934] (EE) unw_get_proc_name failed: no unwind info found [-10]
[ 4.934] (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (?+0x0) [0x7f2b8e823729]
[ 4.934] (EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (__assert_fail+0x46) [0x7f2b8e834f36]
[ 4.934] (EE) 6: /usr/lib/xorg/Xorg (dixRegisterPrivateKey+0x239) [0x55ac579efb39]
[ 4.934] (EE) 7: /usr/lib/xorg/modules/libglamoregl.so (glamor_init+0xcf) [0x7f2a0961b37f]

or log messages like:

privates.c:384: dixRegisterPrivateKey: Assertion `!global_keys[type].created' failed.

then this is bug 1811023.