Public bug reported: [SRU Justification]
https://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=258514 From the 5.13.0-1012-oem kernel we found NO Ethernet connecting after resume from suspend, on 5.13.0-1010-oem we don't met this issue, so this is a regression on I219 in lots of platforms. And this blocked our OEM projects, could we revert the patches in short term? When the firmware or the related patches are ready, we merge it again. Oct 25 22:45:44 p15s-ThinkPad-P15s-Gen-2i kernel: e1000e 0000:00:1f.6 enp0s31f6: Detected Hardware Unit Hang: TDH <3> TDT <7> next_to_use <7> next_to_clean <3> buffer_info[next_to_clean]: time_stamp <ffff5cf8> next_to_watch <3> jiffies <ffff6090> next_to_watch.status <0> MAC Status <40080283> PHY Status <796d> PHY 1000BASE-T Status <3800> PHY Extended Status <3000> PCI Status <10> [Impact] These doesn't improve power consumption on some e1000e platforms. [Fix] I tried to revert these 3 patches on 5.13.0-1019.23, it works fine. commit f65d71bdcb52e8d82dd0a3e71ae4359c0972fe3b Author: Sasha Neftin <sasha.nef...@intel.com> Date: Wed Aug 18 15:10:49 2021 +0800 e1000e: Additional PHY power saving in S0ix BugLink: https://bugs.launchpad.net/bugs/1937252 After transferring the MAC-PHY interface to the SMBus set the PHY to S0ix low power idle mode commit c97933898708a37678ba1fc6f1f5704fbe92774c Author: Sasha Neftin <sasha.nef...@intel.com> Date: Wed Aug 18 15:10:48 2021 +0800 e1000e: Add polling mechanism to indicate CSME DPG exit BugLink: https://bugs.launchpad.net/bugs/1937252 Per guidance from the CSME architecture team, it may take up to 1 second for unconfiguring dynamic power gating mode. Practically it can take more time. Wait up to 2.5 seconds to indicate dynamic power gating exit from the S0ix configuration. Detect scenarios that take more than 1 second but less than 2.5 seconds will emit warning message. commit 66069cb4ebaf0eccfdec934ebfd92d3fdb136adc Author: Sasha Neftin <sasha.nef...@intel.com> Date: Wed Aug 18 15:10:47 2021 +0800 e1000e: Add handshake with the CSME to support S0ix BugLink: https://bugs.launchpad.net/bugs/1937252 On the corporate system, the driver will ask from the CSME (manageability engine) to perform device settings are required to allow S0ix residency. This patch provides initial support. [Test Case] Do suspend and resume 10 times, it works fine. for i in {1..10}; do echo $i rtcwake -m no -s 20 && echo mem > /sys/power/state if dmesg | grep -q "Detected Hardware Unit Hang"; then exit fi sleep 15 done [Where problems could occur] 00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (13) I219-LM [8086:15fb] (rev 20) CPU: 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz ** Affects: oem-priority Importance: Critical Status: New ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: oem-priority originate-from-1948738 sutton ** Tags added: oem-priority originate-from-1948738 sutton -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1949353 Title: [SRU] Revert 'e1000e: add handshake with the Intel CSME to support S0ix' To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1949353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
