Strange graphical issue after a power failure
Strange graphical issue after a power failure
System is Fedora KDE, graphics card is an Asrock Radeon 5900GRE, display is a Gigabyte M34WQ (1440p ultrawide 144Hz refresh rate) attached via DisplayPort.
Despite being on a UPS (which...we're also going to have to talk about) my system was apparently shut down by a thunderstorm. I booted it up, and the display was acting glitchy. I would get two mouse cursors, and below the mouse cursor the screen would go a solid color, as if it was glitching on a pixel and then displaying that from there down.
Switching to a lower refresh rate made the problem go away, I've switched back up and it seems to be alright. A second 1080p60 monitor attached via HDMI didn't show any problem.
Some googling didn't turn up exactly what I was experiencing. Can anyone help troubleshoot this? It seems okay for the moment but I'm hoping I don't have a wounded GPU.
Probably surge damage, honestly. Was your monitor plugged into the UPS or another surge protector, or just into a wall? Do you have any other cables connecting to your machine that aren't on the UPS or a surge protector? Also, a power strip is not equal to a surge protector.
As far as the cause, if you're seeing artifacts on screen past a certain position on the screen, that's the screen or cable, not the GPU. Your display adapter sends fully rendered frames to the display and wouldn't have a specific part of the frame that is corrupted if damaged. Anecdotally speaking, if a GPU has damage, it just won't work.
Also, you may want to check the capacitors on your card and motherboard to make sure they're all still flat and not bulging. If bulging, you took took surge damage and need to redo your cabling to make sure everything is protected.
Everything is attached to the UPS, both the computer and the main monitor are on the battery side. Why the computer was shut off on this UPS, I don't know. I might be switching brands of UPS.
If I switch it down to 60 or 100 Hz, the problem goes away entirely, so I don't think it's a hardware damage issue at this point. Like, I did a software update, I wonder if it's booted up with a slightly newer version of mesa or wayland or something that isn't playing nice.
Check your package manager logs to find out. Also check
dmesgjust in case.Edit: you know what...try changing the outlet the monitor is plugged into and see if anything changes. Curious if the signal is weird or the rectifier got damaged by a surge. Maybe try the wall as well to find out if it still does it.