When I updated to today’s snapshot, for some reason nothing would display on my laptop. After rolling back to 20240829, it started working again, and again stopped working when I upgraded.
Eventually, I realized that if I unplugged my external display, I could get to my login screen. After logging in, everything behaved normally until I plugged in my display, whereupon my monitor notified me that my DisplayPort cable was sending no signal.
Then I decided to go to the X11 Session and tried to plug it in there. Plasma did not seem to recognize it, and upon telling it to extend the display to the left it set my display to 1368x768 and persisted that upon reboot, which I eventually figured out how to fix (hitting the down arrow a couple of times to reach the resolution option.) Once I figured that out and went back to the Wayland option, Linux finally sent a proper signal to my monitor.
Okay yeah ever since the update my computer will hard crash on boot if I have an external display plugged in. Thankfully I can work around this by just not plugging in the display, but it’s a little frustrating given that it worked two days ago.
Not yet, but mostly because I want to figure out what the problematic part is. I’ve narrowed down the problem to one of the kernel-firmware updates, as setting those to protected when doing the update caused the problem to stop occurring.