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It's possible your screens electrically disconnect themselves when going to sleep, which makes Plasma refresh its desktop layout, causing flickering.
My Asus screen does this when powered off but not in standby. That used to crash Plasma Wayland back in 5.24 lol
How would I tell if that’s the case? And I guess there’s nothing I can do about it if that is the cause?
Flickering how?
Does the contents of the image change? Does it move? Do the monitors lose signal? Is there a rhythm / pattern to it? Does it flicker when you do something (e.g. move the mouse)?
Mine sometimes flicker when Chrome is loaded. When it happens part of the screen gets corrupted, and updates to the screen (e.g. moving windows) tend to make it happen. The monitors stay locked the whole time, but it will only effect one of my two screens.
Yes that’s pretty much it, there’s a strip around 3/4 of the way down both displays that has white line flicker across it whenever there’s any movement on either screen.
Yeah. My theory is that the AMD GPU driver has swapped out too much to main memory from VRAM because anything with high VRAM usage seems to cause it.
I'm on an RX7600.
It’s definitely not that for me as I’m on Nvidia!
Is it a kernel 6.10 bug?
Isn't that what Explicit Sync was trying to solve? Check your Nvidia driver version, as well as your KDE Plasma version and see if they both support Explicit Sync.
Yeah I’m definitely above the relevant versions for kde and Nvidia
Just joining the discussion, because this happens to me too, and it's very frustrating.
I'd recommend flashing your distro on a USB drive (it could be the live installer or honestly just the whole darn thing if you want it to be persistent), boot up off the driver, and start playing around to see if you can reproduce the problem.
That’s a good idea, I’ll try the endeavour OS live environment as that should be close enough to my setup