I've got my Win10 VM working (finally) with GPU passthrough, but I am finding that on the odd occasion that I will lose HDMI signal and nothing I do will get it back (even a server reboot)

 

For instance when I turned on HDR in Windows the screen went black but then I get shown a No signal message. I got a HDMI cable connected to my LG C9 OLED - and works brilliantly when it does but its just this niggling issue that is hampering my experience. 

 

Logs do not show any faults either on the VM/Server side. Is this something that is a common occurrence? Anyone know of a fix?

Edited March 29, 20224 yr by z0ki

So this is embarrassing. 

 

The issue was the HDMI cable is not a HDMI 2.1 or (2.0 i believe) hence I was losing signal. Tested with a known HDMI 2.1 cable and viola! Picture.

 

I been ripping my hair out over this for days thinking something in my VM or an issue with GPU passthrough has been happening but nope. Just my idiocy lol.

 

 

Don't be so rude with yourself

Failures due to cables are difficult to see, especially if they look good from the outside, one should always have spare cables (I don't) to try.

2 minutes ago, ghost82 said:

Don't be so rude with yourself

Failures due to cables are difficult to see, especially if they look good from the outside, one should always have spare cables (I don't) to try.

 

Haha i know right. I didn't even think it could be the HDMI cable and something just clicked to me that said hang on might be the cable that can't output HDR to a 4K res. 

 

Simple fix in the end but wish I saw this before i got more grey hair 😋