4k monitors stuck to 30hz in win10 VM after unraid update

[ec911]

Hello,

 

I just updated unraid from 6.9.2 to 6.11.0-rc5.

When I restarted my Win10 VM, I noticed that my two 4k monitors are capped at 30hz instead of 60hz now. Cannot raise it any higher in the display settings. I tried reinstalling my geforce drivers and I also created a new VM with the same settings and passthroughs (passing a geforce gtx970 and nvme drive with win10 installed on it) and it's not working.

 

I downgraded back to 6.9.2 and the monitors are behaving correctly. I'm not sure what to try next before attempting to reinstall windows.

 

Does anyone had an issue with this?

 

Thanks

tower-diagnostics-20220915-1637.zip

Edited September 15, 2022 by ec911

[Evedoescomputerstuff]

That's strange. Can you try CRU to force the resolution / refresh? 

Display Port? 

If none of this works, for sanity, do you have another 4K 60hz capable display you can try? Anything to get a different EDID will be helpful. 

 

Edited September 19, 2022 by Evedoescomputerstuff

[ec911]

On 9/19/2022 at 1:35 PM, Evedoescomputerstuff said:

That's strange. Can you try CRU to force the resolution / refresh? 

Display Port? 

If none of this works, for sanity, do you have another 4K 60hz capable display you can try? Anything to get a different EDID will be helpful. 

 

Display port yes

 

I did try CRU and cannot force the refresh rate at 3840 x 2160 to 60hz.

If I drop the resolution to 2560 x 1440 I can change it to 60hz no problem.

 

I don't have another monitor I can try.

If I run Windows on bare metal (windows is installed on a dedicated nvme drive), refresh rates are ok @ 4k.. 

 

I really don't understand, I even tried on unraid 6.10.3 and I got the same problem. Guess I will have to downgrade to 6.9 again..

[JorgeB]

Try the just released v6.11.0 to see if there’s any difference.

[ghost82]

I think this is due to the nvidia gpu running in a vm.

Try to change the features block in your xml to:

 <features>
    <acpi/>
    <apic/>
    <hyperv>
      <relaxed state="on"/>
      <vapic state="on"/>
      <spinlocks state="on" retries="8191"/>
      <vendor_id state="on" value="1234567890ab"/>
    </hyperv>
    <kvm>
      <hidden state="on"/>
    </kvm>
    <vmport state="off"/>
    <smm state="on"/>
  </features>