GPU has a very high load if the monitor is turned off by KDE

Hi,

Recently I upgraded my Arch with the following package updates:

- Plasma (6.6.0-1 -> 6.6.1-1)
- Kernel (6.18.6 -> 6.18.9)

Both are minor updates thus I thought it should be mostly smooth sailing.

But after the update, after the monitor is turned off after a timeout=20
(10min in my case), the fan of my GPU ramp up.
This also happens when my system is put into suspension.

Unfortunately the behavior is not 100% reproducible, but still=20
frequently enough to notice the noisy fan running.


The involved platform is:

CPU: AMD Ryzen AI 9 HX 370 w/ Radeon 890M
iGPU: Radeon 890M
eGPU: RX 7600M XT
       OcuLink eGPU from Aoostar

All monitors are connected to that eGPU.

Any clue on what to test next? Is it something related to KDE or the kerne=
l?

Thanks,
Qu