Comment # 3 on bug 111122 from Brian Schott

I think that I'm seeing something related with my 2700u Inspiron 7375.

If I have compositing enabled in XFWM4, the system will immediately stop
responding after logging in with LightDM. If the window manager compositing is
disabled, I'm able to log in, but then there is graphical corruption.

With git bisect I traced the problem back to
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=df8368be1382&id=df8368be1382b442384507a5147c89978cd60702

I can edit the source file, and by only changing the KMS_DRIVER_MINOR
definition from 32 to 30, get the system working correctly with 5.2.0.