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

[Qu Wenruo]

在 2026/2/28 09:26, Qu Wenruo 写道:
> 
> 
> 在 2026/2/28 07:53, Qu Wenruo 写道:
>> 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 
>> (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 
>> frequently enough to notice the noisy fan running.
> 
> Downgrading kernel ruled out the kernel bug.
> 
> And I have tried 3 times to suspend, and can reproduce the high GPU load 
> 3 times.
> 
> Another thing I noticed is, previous when suspending, the eGPU seems to 
> be completely shutdown (only the power LED lights up, the work LED shut 
> down).
> 
> But now when suspension happened, the eGPU doesn't shutdown at all, just 
> with its fan ramping up.
> 
> Will try downgrading the firmware as the next step just in case.

Blacklisting the amdxdna module solves the suspension problem at least.

I can not hate the stupid NPU/AI thing more.

Thanks,
Qu

> 
> Thanks,
> Qu
> 
>>
>>
>> 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 
>> kernel?
>>
>> Thanks,
>> Qu
>