Thanks a lot for the details.

I see several problems here:

1) At 15:00:15, there is a kernel error (RPM wakelock ref not held
during HW access). So this may be related to the kernel upgrade. Adding
a linux task.

Can you check if it happens with stock kernel, not from HWE (linux-
image-generic which is 4.15.0)?

2) At 18:16:33, gnome-flashback segfaults. Most probably the error was
submitted to errors.ubuntu.com. However, to find it, it would be nice to
know your whoopsie id.

Can you please paste the output of this command: sudo cat 
/var/lib/whoopsie/whoopsie-id?
Using this ID other people may see the crashes reported from your system 
(anyone will see the summary, developers will be able to see the details). If 
you worry about privacy, send me the output to mity...@ubuntu.com.

3) In several places, there is also this error:

/usr/lib/gdm3/gdm-x-session[1894]: Fatal server error:
/usr/lib/gdm3/gdm-x-session[1894]: (EE) EnterVT failed for screen 0
...
/usr/lib/gdm3/gdm-x-session[1894]: (EE) Please also check the log file at 
"/home/myuserid/.local/share/xorg/Xorg.0.log" for additional information.

Can you please attach that file too? And I am also adding an xorg-server
task.

Note that I am the maintainer of gnome-flashback, so I will only be able
to look at issue 2. I hope the maintainers of linux and xorg will be
able to look at the other two issues.

** Also affects: xorg-server (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: linux-signed-hwe (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1842425

Title:
  No GUI with Gnome Flashback or Classic after apt dist-upgrade; Ubuntu
  on Wayland OK

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