https://psalabs.eu/tags/troubleshooting/Recent content in Troubleshooting on PSA LabsHugoen-usSun, 08 Feb 2026 00:00:00 +0000https://psalabs.eu/articles/kb/proxmox-nic-issues/Sun, 08 Feb 2026 00:00:00 +0000https://psalabs.eu/articles/kb/proxmox-nic-issues/<h2 id="summary">Summary</h2> <p>Some Intel onboard NICs using the <strong>e1000e</strong> driver can intermittently lose network connectivity on Proxmox VE and repeatedly log errors like:</p> <ul> <li><code>e1000e … Detected Hardware Unit Hang</code></li> </ul> <p>This can cascade into Linux bridge ports being disabled (VM connectivity loss) and may trigger reboot/recovery automation if present.</p> <p>A commonly used mitigation is to disable specific NIC offloads (especially <strong>TSO</strong>) and disable <strong>EEE (Energy Efficient Ethernet)</strong>, then re-apply those settings on every boot using a systemd unit.</p>