Javier reports seeing packet loss issues related to the re-enablement of K1; disabling it makes the issues go away. Add the reported system to have K1 disabled by default. Reproduction steps (from the Link): Plug the cable and ping the default gateway on the LAN. No suspend/resume involved, machine freshly booted and on AC power. Nothing e1000e-related in dmesg apart from the link up/down messages; no "Hardware Unit Hang". Default (K1 enabled): $ ping -c 30 192.168.10.1 --- 192.168.10.1 ping statistics --- 30 packets transmitted, 18 received, 40% packet loss, time 29734ms rtt min/avg/max/mdev = 0.211/0.315/0.384/0.046 ms The lost packets are spread over the run (seq 6, 8, 9, 11, 13, 14, 16, 19, 20, 24, 25, 30), not a single burst. DHCP on this link also takes 1-2 minutes to get a lease, consistent with incoming packets being dropped. With K1 disabled at runtime: # ethtool --set-priv-flags enp0s31f6 disable-k1 on $ ethtool --show-priv-flags enp0s31f6 Private flags for enp0s31f6: s0ix-enabled: on disable-k1 : on $ ping -c 30 192.168.10.1 --- 192.168.10.1 ping statistics --- 30 packets transmitted, 30 received, 0% packet loss, time 29713ms rtt min/avg/max/mdev = 0.169/0.251/0.468/0.054 ms $ ping -c 30 192.168.10.1 --- 192.168.10.1 ping statistics --- 30 packets transmitted, 30 received, 0% packet loss, time 29677ms rtt min/avg/max/mdev = 0.101/0.222/0.360/0.064 ms I have only compile tested this, but Javier has tested that disabling K1 on his system (Lenovo ThinkPad P14s Gen 5 (Intel), I219-LM [8086:550a]) resolves his issues. Cc: stable@vger.kernel.org Fixes: 578294b8b60d ("e1000e: Reconfigure PLL clock gate timeout and re-enable K1 on Meteor Lake") Reported-by: Javier Herrera Link: https://lore.kernel.org/intel-wired-lan/CAKRuCQLWEcci9hPgNUmvq44Bd2H30T5_vP=exMjsknXMN5Yh9A@mail.gmail.com/ Reviewed-by: Aleksandr Loktionov Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/e1000e/netdev.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index ad9b88c9af22..6f85dab5c55c 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -67,6 +67,13 @@ static const struct dmi_system_id disable_k1_list[] = { DMI_MATCH(DMI_PRODUCT_NAME, "Dell Pro 16 Plus PB16250"), }, }, + { + .ident = "Lenovo ThinkPad P14s Gen 5", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad P14s Gen 5"), + }, + }, {} }; -- 2.47.1