** Package changed: Ubuntu Noble => linux (Ubuntu Noble) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2115393
Title: No IP Address assigned after hot-plugging Ethernet cable on HP Platform Status in HWE Next: Triaged Status in linux package in Ubuntu: In Progress Status in linux-oem-6.11 package in Ubuntu: Invalid Status in linux-oem-6.14 package in Ubuntu: Invalid Status in linux source package in Noble: Fix Committed Status in linux-oem-6.11 source package in Noble: Fix Released Status in linux-oem-6.14 source package in Noble: Fix Committed Status in linux source package in Plucky: Fix Committed Status in linux-oem-6.11 source package in Plucky: Invalid Status in linux-oem-6.14 source package in Plucky: Invalid Status in linux source package in Questing: In Progress Status in linux-oem-6.11 source package in Questing: Invalid Status in linux-oem-6.14 source package in Questing: Invalid Bug description: [ 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. Although there is an RFC patch [1] from upstream mailing list, it simply introduces a module parameter which can turn the k1 configuration off. That being said, turning off the k1 configuration would increase the system's power consumption. [ Fix ] For the temporary solution, we revert the following patch: 96d4a384ccc2edfe5 e1000e: change k1 configuration on MTP and later platforms [ 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 ] Reverting the commit might cause minor packet loss on some platform, said by the Intel Ethernet maintainer. That being said, we have not observed it on our certified machines. [ Additional Information ] [1] https://lore.kernel.org/netdev/[email protected]/ To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2115393/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
