Hello,
First of all, thank you for CachyOS. It’s rapidly becoming my favorite OS.
However, since yesterday I encountered a serious issue and I am completely stuck.
I have PCI-e passthrough (IOMMU) configured for my Nvidia RTX 4090 and my iGPU set as primary. My setup for the past 1.5 years (also before CachyOS, when I used Manjaro) has been to use a host OS (CachyOS) and a guest OS (CachyOS, Windows, etc.) configured via virt-manager & QEMU/KVM. This worked like a dream, I could code in one virtual machine, game in another, etc. My virtual machines were like virtual rooms of a virtual house.
That all came crashing (literally) down yesterday. Since a unknown update (I suspect the kernel) my VMs stopped working. I either get black screens or the VM crashes (usually it’s a crash).
I have since tried, nothing installed except:
- CachyOS X11 or Wayland
- CachyOS nvidia-open or nvidia (closed)
- CachyOS linux hardered kernel
- A older version of CachyOS
- A different distro (latest Manjaro)
- Windows (but this might be unrelated, as I haven’t started that VM in 2 months)
- My RTX 4090 not attached to a VM, which indeed makes it work. But I need it (for coding to run local AI via ollama) and for gaming (I game in CachyOS VM).
Nothing worked.
Any help would be hugely appreciated. Thanks so much!
P.s. I have not yet and have considered re-installing my host OS (CachyOS), however since PCI-e passthrough is quite a bit of work to set up right, I rather avoid it if possible. Both my CachyOS host OS and Linux guest OSes (virtual machines) are up-to-date.