Revert Guide?

[flipch]

How does one revert the readme guide? After restarting the host I no longer can see /dev/dri/ devices that I was previously sharing with my LXC containers

[ruanmed]

Hi @flipch .
You need to undo the edits performed in the files mentioned in section Configuring the GPU for passthrough. Which are:

• /etc/modules
• /etc/modprobe.d/vfio.conf

Basically what's happening is that, with those edits, proxmox is NO longer loading the amdgpu drivers, and loading the vfio drivers instead, and that means LXC containers no longer can use the GPU, because the OS won't have any GPU available.

After removing the changes from both files, you need to also peform step 6 to refresh the kernel modules and restart:

update-initramfs -u -k all
shutdown -r now

And after restarting proxmox should be loading the amdgpu drivers again, and there should be no issues to your promox LXC containers.

---

So that just goes as a reminder to anyone that reach this:

• GPU passthrough means the HOST (proxmox) can no longer use that GPU.

If you are sharing GPU from proxmox host to LXC containers you cannot ALSO perform GPU passthrough to guest VMs in parallel.
If you passed through the GPU that means that proxmox NO longer has any GPU available for the LXC containers.
Unless, of course, you have more than one GPU in your machine...