Single GPU isn't substantially harder than 2GPU pass through, that is what I have done, but it does require support by the UEFI bios and the GPU and not all support it.
this post was submitted on 13 Nov 2024
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If there's a game that doesn't work on Linux because of anti or something it probably won't work in a vm either so dual booting would probably be the way to go to avoid that
@variants @shapis Not true, a root-kit will break it in wine because wine is just translating windows sys calls into Linux sys calls, but a vm is actually running a windows kernel, then the root kit anti-cheat works fine. With GPU pass through, I have found no games that work under Windows won't also work within the VM.
At least MiHoyo's anti cheat detects and blocks VirtualBox VMs as well as Waydroid.
@lord_ryvan Interesting, haven't played that game so no experience with it. VirtualBox does do some things a bit differently, I was not able to get flyff to run it well, it runs but at about 3fps, where as it runs normally in kvm/qemu.
I have the 2020 G14 and I got this working once. I'm afraid easy and simple are not a thing here, as you need to understand what you're doing if you want it to work well. The basics are:
- Prevent the host system from loading any drivers that touch the discrete GPU. This is done by attaching it to the VFIO driver and uninstalling/blacklisting the Nvidia and Nouveau drivers.
- Make sure you have the correct kernel parameters to support virtualisation and PCI-e passthrough.
- Create a Windows VM and attach the Nvidia GPU to it.
- Setup Looking Glass so you can play with the best possible latency. This will likely require a dummy USB-C display stick.
Personally, I don't think it's worth the hassle. I keep a Windows install for when it's needed, and do most of my gaming on a separate system.
Does it have to be a VM? Is Steam or Lutris not an option?
Most anti-cheat doesn't take kindly to running in a VM as well, so if that's the reason it won't work.
proton has support for quite a few kernel level anti cheat now, although it has to be explicitly allowed by the dev. needs to be run via steam I think, but you can add non steam games if you got them elsewhere
I used the Arch instructions on Ubuntu 22.04 wiki.archlinux.org/title/PCI_p… and it worked, but broke on 24.04 owing to broken UEFI bios on 24.04.
Indeed. That’s the opposite of what I’m looking for though. That’s complicated and apparently breaks ?
I’m currently dual booting. Which works fine. I was wondering if there was an easier way though.
@shapis It's complicated to setup but once done works wonderfully, you can share one GPU between OS's in real time, even have one windows window up along with Linux at the same time. So I'm temporarily fuxored but I already have a plan for a fix and that is simply to steal the UEFI vm bios from Manjaro which does work and use it on Ubuntu.
With Proxmox on AMD gpus, it can be as simple as picking a pci device from a dropdown.
-- but then again, you'll need to learn how to properly use proxmox, esp. with respect to storage configuration. Also, the performance can still suffer, depending on various factors.
If it's not too big of an inconvenience, dual boot is the way to go, IMHO.