https://homelab.nbkelley.com/tags/intel/ Recent content in Intel on homelab Hugo en Fri, 01 May 2026 00:00:00 +0000 https://homelab.nbkelley.com/docs/infrastructure/gpu-passthrough-lxc/ Fri, 01 May 2026 00:00:00 +0000 https://homelab.nbkelley.com/docs/infrastructure/gpu-passthrough-lxc/ <h1 id="gpu-passthrough-for-proxmox-lxcs">GPU Passthrough for Proxmox LXCs<a class="anchor" href="#gpu-passthrough-for-proxmox-lxcs">#</a></h1> <h2 id="what-was-established">What Was Established<a class="anchor" href="#what-was-established">#</a></h2> <ul> <li>Intel GPU passthrough to Proxmox LXCs requires both host-side module loading and specific LXC device mounts.</li> <li><code>vainfo</code> frequently fails with X11/X server errors in headless containers; this is expected and does not indicate a broken passthrough.</li> <li><code>intel_gpu_top</code> requires <code>i915</code> module loaded on the host and accessible debugfs/sysfs paths inside the container.</li> </ul> <h2 id="key-decisions">Key Decisions<a class="anchor" href="#key-decisions">#</a></h2> <ul> <li><strong>Headless VA-API Testing</strong>: When <code>vainfo</code> reports <code>error: can't connect to X server!</code>, set environment variables to bypass X11: <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>export XDG_RUNTIME_DIR<span style="color:#f92672">=</span>/tmp/runtime-root </span></span><span style="display:flex;"><span>export LIBVA_DRIVER_NAME<span style="color:#f92672">=</span>iHD </span></span><span style="display:flex;"><span>vainfo</span></span></code></pre></div></li> <li><strong>Module Verification</strong>: <code>lsmod | grep i915</code> confirms the driver is loaded inside the container. Presence of <code>i915</code>, <code>drm_buddy</code>, <code>ttm</code>, and <code>drm_display_helper</code> indicates successful module injection.</li> <li><strong>Device Access</strong>: <code>intel_gpu_top</code> failing with <code>No device filter specified...</code> typically points to missing debugfs mounts or host-side <code>i915</code> parameters, not necessarily a broken <code>/dev/dri/</code> passthrough.</li> </ul> <h2 id="current-configuration">Current Configuration<a class="anchor" href="#current-configuration">#</a></h2> <p><strong>Proxmox LXC Config (<code>/etc/pve/lxc/&lt;container-id&gt;.conf</code>)</strong>:</p>