GPU Passthrough for Proxmox LXCs

May 1, 2026

Proxmox, Lxc, Gpu, Intel, Jellyfin, Va-Api, I915

GPU Passthrough for Proxmox LXCs#

Intel GPU passthrough to Proxmox LXCs requires both host-side module loading and specific LXC device mounts.
vainfo frequently fails with X11/X server errors in headless containers; this is expected and does not indicate a broken passthrough.
intel_gpu_top requires i915 module loaded on the host and accessible debugfs/sysfs paths inside the container.

Headless VA-API Testing: When vainfo reports error: can't connect to X server!, set environment variables to bypass X11:
```
export XDG_RUNTIME_DIR=/tmp/runtime-root
export LIBVA_DRIVER_NAME=iHD
vainfo
```
Module Verification: lsmod | grep i915 confirms the driver is loaded inside the container. Presence of i915, drm_buddy, ttm, and drm_display_helper indicates successful module injection.
Device Access: intel_gpu_top failing with No device filter specified... typically points to missing debugfs mounts or host-side i915 parameters, not necessarily a broken /dev/dri/ passthrough.

Proxmox LXC Config (/etc/pve/lxc/<container-id>.conf):