Comment 10 for bug 1964120

Got directed here from bug (private due to coredump attachement) that Daniel marked a duplicate of this one.

I can reliably reproduce my original issue following:

1. Fresh boot
2. Connect external monitors
3. Put laptop to sleep
4. Wake laptop from sleep (one of two external monitors is still black)
5. Go to Settings -> Display (Gnome thinks both monitors are enabled)
6. Disable the black monitor and enable it again.
7. Gnome enables the problematic monitor for a split second and then disables it instantly.

Attaching prevboot.txt for the above.

I have so far two workarounds for my issue

Workaround 1:
- go to TTY3 with Ctrl+Alt+F3 (no need to log in, just wait for all monitors to work)
- go to TTY1 with Ctrl+Alt+F1 (lands on GDM log in page, I log in)
- all monitors now work and applications are preserved (sometimes need to enable it in settings)

Workaround 2:
- power cycle the black monitor (but without messing with Settings -> Display first)

Happy to provide more information or test solutions. It was driving me crazy to at least figure out reproducibility pattern and possible workarounds (stayed until 3am one night experimenting...).

Not sure if useful but I also learned:
- happens also on kernel 5.17 from https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.17.2/amd64/
- happens also on live usb session from Ubuntu 22.04 so not likely my local changes
- does not happen on live usb of fedora 36 beta (tested as it also has gnome 42)