On Friday, July 21, 2017 at 3:36:42 AM UTC-4, Foppe de Haan wrote:
> 4k in dom0 shouldn't be an issue at all, though using a 1080 for that is a 
> bit wasteful. I'd suggest getting like an rx550 (or a HD 7750, like I had 
> lying around) for use in dom0, and passing the GTX 1080 through to a VM 
> (perhaps after updating the kernel to self-built 4.11?). I did not have much 
> success with passthrough when I still had my gtx 950, but I'm a linux n00b, 
> and that got in the way of troubleshooting.
> 
> The installation issues are due to the installer being somewhat older (and 
> including a 4.4-based kernel); they may be resolved with the 3.2.1. release.

Thanks for your help.

Yeah, I wouldn't get a 1080 just for this purpose, that's just what I already 
have in my desktop, but I've been unable to get it to work with Qubes at all. I 
have tried both the proprietary driver and nouveau on the default kernel, and 
the newest kernels in both unstable and current-testing, but no luck.  From the 
threads I've seen, it sounds like nobody has managed to get it to work at all- 
not just passthrough, it won't load X at all.  My intent with this thread isn't 
to troubleshoot those issues.  Unless somebody actually has gotten it working, 
I'm ready to give up on that one.  So, I'm thinking about buying a second, 
cheap, card that works with Qubes that can support 4k resolutions.

I was thinking about getting a card like the rx550, but the Qubes documentation 
says that it does not support the 550 because AMD GPU wasn't supported until 
after kernel 4.4.  If I went with a 550, are you thinking I would update to the 
current-testing kernel and that would get it working?  Are you pretty confident 
in that?  If not, maybe I'll go with the 7750 or similar, since you know for 
sure that that works.

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