Test with 4.4.127-3.g662314f-default: "Failure via adjfreq" appears, but no "No SYSCFI in TSYNCRXCTL". I post some lines from dmesg below. If this is not sufficient, please don't hesitate asking for more output. Thank you, Achim fphnbam3:/usr/src # dmesg | grep -e "e1000" -e "Linux version" -e"TSYNCRXCTL" [ 0.000000] Linux version 4.4.127-3.g662314f-default (geeko@buildhost) (gcc version 4.8.5 (SUSE Linux) ) #1 SMP Mon Apr 16 07:16:05 UTC 2018 (662314f) [ 5.692949] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k [ 5.692951] e1000e: Copyright(c) 1999 - 2015 Intel Corporation. [ 5.697740] e1000e 0000:00:1f.6: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode [ 5.796742] e1000e 0000:00:1f.6 0000:00:1f.6 (uninitialized): registered PHC clock [ 5.890126] e1000e 0000:00:1f.6: Failure via adjfreq [ 5.890129] e1000e 0000:00:1f.6: Failed to restore TIMINCA clock rate delta: -22 [ 5.890882] e1000e 0000:00:1f.6 eth0: (PCI Express:2.5GT/s:Width x1) 54:e1:ad:7a:6c:ed [ 5.890884] e1000e 0000:00:1f.6 eth0: Intel(R) PRO/1000 Network Connection [ 5.890927] e1000e 0000:00:1f.6 eth0: MAC: 12, PHY: 12, PBA No: 1000FF-0FF [ 6.787012] e1000e 0000:00:1f.6: Failure via adjfreq [ 6.787014] e1000e 0000:00:1f.6: Failed to restore TIMINCA clock rate delta: -22 [ 8.430980] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx [ 8.430988] e1000e 0000:00:1f.6 eth0: 10/100 speed: disabling TSO