Affected by the same issue on a different machine and kernel. ## Environment
- **Ubuntu:** 24.04.4 LTS (Noble) - **Kernel:** 7.0.0-28-generic - **NIC:** Intel Corporation [8086:550a] rev 20 (I219-V), PCI 0000:00:1f.6 - **Driver:** e1000e, firmware 1.1-4 ## Symptoms Same Hardware Unit Hang pattern. The `e1000_watchdog_task` hogged CPU for >10000us an increasing number of times (4 → 5 → 7 → 11 occurrences) before the TX ring entered a permanent hang state. After the hang, `tx_packets` stayed at 0 and `tx_dropped` climbed continuously. The NIC did not recover — driver reload (`rmmod`/`modprobe`) did not clear the hang. Only a full reboot restored functionality. The hang occurred without any suspend/resume cycle, under normal network load on a wired connection. ## Workaround (confirmed) Disabling TSO/GSO/GRO offloading and adding `SmartPowerDownEnable=1` as a module parameter prevented recurrence after reboot: ```bash nmcli connection modify <uuid> \ ethtool.feature-tso off \ ethtool.feature-gso off \ ethtool.feature-gro off echo 'options e1000e SmartPowerDownEnable=1' | sudo tee /etc/modprobe.d/e1000e.conf sudo update-initramfs -u ``` ## Note The device ID `[8086:550a]` (Meteor Lake / Arrow Lake era I219-V stepping) may differ from the original report. Flagging in case this affects triage or patch applicability. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2121008 Title: e1000e 0000:00:1f.6 eno1: Detected Hardware Unit Hang: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2121008/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
