Bug 464024

SUMMARY
***
On Fedora 37, recent updates (around Christmas) have made KDE stop working with multiple monitors.  The PC will boot with both monitors working, but when KDE starts after the GDM login, the second monitor will quickly go dark and power down.  Attempts to use the Display Configuration fail.  It sees the second monitor, but its not enabled and attempts to re-enable it always fail to activate the monitor, and eventually the enabled button turns off again.  

If I launch GNOME, the second monitor is working fine, if I turn off the primary monitor and make the second primary, it works fine.  So its not the cabling or faulty monitor.

Sometimes, after playing with trying to enable the monitor the config tool will crash (https://bugs.kde.org/show_bug.cgi?id=462653)
This is likely related but I don't know if its the root cause.

I've waited for a couple weeks hoping a new Fedora DNF upgrade will fix the problem, but multiple updates have not so far.
***


STEPS TO REPRODUCE
1.   Enable secondary monitor
2. 
3. 

OBSERVED RESULT
Secondary monitor stays dark, no signal to the screen.

EXPECTED RESULT
It should extend the desktop to both monitors

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:  5.26.5
(available in About System)
KDE Plasma Version:  5.26.5
KDE Frameworks Version:  5.101.0
Qt Version:  5.15.7

ADDITIONAL INFORMATION (from About System)
Operating System: Fedora Linux 37
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.101.0
Qt Version: 5.15.7
Kernel Version: 6.0.17-300.fc37.x86_64 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700K CPU @ 4.00GHz
Memory: 31.3 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1080/PCIe/SSE2
Manufacturer: Gigabyte Technology Co., Ltd.

Both monitors hooked up with DisplayPort cables to single Nvidia 1080.