Public bug reported: [ Impact ]
On HP platform, a system equipped with Intel 8086:57a0 Ethernet exhibits a symptom: after hot plugging the Ethernet cable, the network interface can't get an IP address from DHCP server. This is caused by a packet loss problem introduced by the commit from stable update: 96d4a384ccc2edfe5 e1000e: change k1 configuration on MTP and later platforms The packet loss problem reproduces with the 100% rate, when no packet can be sent and received by the Ethernet controller, eventually block the DCHP process. It was reverted in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2115393 but Intel propose a new fix [1] to disable K1 on certain platforms. [ Fix ] Backport commit in [1] from upstream [ Test Plan ] 1. Boot into Ubuntu kernel with Ethernet cable unplugged 2. Plug the Ethernet cable into the machine 3. Check if the system can get IP address from a DHCP server [ Where problems could occur ] This patch disable K1 by default for MTL and later platforms and the risk of regression should be limited [ Additional Information ] [1] https://lore.kernel.org/netdev/[email protected]/ ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Affects: linux-oem-6.17 (Ubuntu) Importance: Undecided Status: New ** Affects: linux (Ubuntu Noble) Importance: Undecided Status: New ** Affects: linux-oem-6.17 (Ubuntu Noble) Importance: Undecided Assignee: Chris Chiu (mschiu77) Status: In Progress ** Affects: linux (Ubuntu Questing) Importance: Undecided Status: New ** Affects: linux-oem-6.17 (Ubuntu Questing) Importance: Undecided Status: New ** Also affects: linux-oem-6.17 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Questing) Importance: Undecided Status: New ** Also affects: linux-oem-6.17 (Ubuntu Questing) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux-oem-6.17 (Ubuntu Noble) Importance: Undecided Status: New ** Changed in: linux-oem-6.17 (Ubuntu Noble) Status: New => In Progress ** Changed in: linux-oem-6.17 (Ubuntu Noble) Assignee: (unassigned) => Chris Chiu (mschiu77) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2130219 Title: Disable K1 on Intel ethernet controller for MTL and later platforms To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2130219/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
