I'm preparing for a migration for Proxmox from a system based on dual Xeon L5640 to a system running a i7-6700T. (don't ask).
One of the containers is a Plex media server.
The Xeons have no iGPU, but never had any issues with transcoding. 24 cores FTW !!!
The i7 needs the iGPU to lend a helping hand while transcoding, or it's "All aboard for the express to CPU-meltdown-ville !!".
So it's iGPU passthrough setup for the first time, for me.
Here's what I've got, and I believe it works. Given htop output & Plex dashboard transcoding graphs & intel_gpu_top numbers while transcoding.
My Notes on iGPU passthrough from Proxmox host to an LXC:
On the Proxmox host we have :
So, I'm concluding the LXC's video group will need access to card0 , and the render group access to renderD128. Right ?
Obtain these groupids inside the LXC by doing :
Hmm, that's handy, user plex is already member of those groups.
44 is the groupid for group 'video' inside the lxc,
and 106 is the groupid for group 'render' inside the lxc.
Using the GUI, in the LXC's Resources we add Device Passthroughs :
In humanspeak, do these lines mean "allow the container's gid 44 access to host device /dev/dri/card0",
and "allow the container's gid 106 access to host device /dev/dri/renderD128" ?
We don't care about the GIDs on the host, only about what group in the container has access to the device (grp video has access to card0, grp render can access renderD128) ?
These are the only steps I took, and things just seem to function.
No drivers in the LXC nor on the host, no faffing about in grub or uefi bootloader, no nothing .
Something that struck me as odd, and I'd like to know what happened is this :
Accidentally I swapped the GIDs for the device mounts, I gave card0 gid 106, and renderD128 gid 44.
Things still worked. I tested it many times, swapping the gids around... iGPU was still functional in the LXC, regardless.
Why ??
Besides putting this online for the instruction & entertainment of others, I would love it of you could comment on this... perhaps I've overlooked something ?
Thanks for reading this long post all the way to here & thank you for any input !!
Tom.
One of the containers is a Plex media server.
The Xeons have no iGPU, but never had any issues with transcoding. 24 cores FTW !!!
The i7 needs the iGPU to lend a helping hand while transcoding, or it's "All aboard for the express to CPU-meltdown-ville !!".
So it's iGPU passthrough setup for the first time, for me.
Here's what I've got, and I believe it works. Given htop output & Plex dashboard transcoding graphs & intel_gpu_top numbers while transcoding.
My Notes on iGPU passthrough from Proxmox host to an LXC:
On the Proxmox host we have :
Code:
root@pve:~# ls -l /dev/dri
total 0
drwxr-xr-x 2 root root 80 Feb 15 09:29 by-path
crw-rw---- 1 root video 226, 0 Feb 15 09:29 card0
crw-rw---- 1 root render 226, 128 Feb 15 09:29 renderD128So, I'm concluding the LXC's video group will need access to card0 , and the render group access to renderD128. Right ?
Obtain these groupids inside the LXC by doing :
Code:
cat /etc/group | grep -E "video|render"
video:x:44:plex
render:x:106:plex44 is the groupid for group 'video' inside the lxc,
and 106 is the groupid for group 'render' inside the lxc.
Using the GUI, in the LXC's Resources we add Device Passthroughs :
Code:
dev0: /dev/dri/card0,gid=44
dev1: /dev/dri/renderD128,gid=106In humanspeak, do these lines mean "allow the container's gid 44 access to host device /dev/dri/card0",
and "allow the container's gid 106 access to host device /dev/dri/renderD128" ?
We don't care about the GIDs on the host, only about what group in the container has access to the device (grp video has access to card0, grp render can access renderD128) ?
These are the only steps I took, and things just seem to function.
No drivers in the LXC nor on the host, no faffing about in grub or uefi bootloader, no nothing .
Something that struck me as odd, and I'd like to know what happened is this :
Accidentally I swapped the GIDs for the device mounts, I gave card0 gid 106, and renderD128 gid 44.
Things still worked. I tested it many times, swapping the gids around... iGPU was still functional in the LXC, regardless.
Why ??
Besides putting this online for the instruction & entertainment of others, I would love it of you could comment on this... perhaps I've overlooked something ?
Thanks for reading this long post all the way to here & thank you for any input !!
Tom.
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