Comment 26 for bug 1913763

ddstreet@ddstreet-test:~$ dpkg -l systemd|grep systemd
ii systemd 229-4ubuntu21.29 amd64 system and service manager
ddstreet@ddstreet-test:~$ ls -l /dev/ptp*
crw------- 1 root root 247, 0 Apr 2 17:12 /dev/ptp0
crw------- 1 root root 247, 1 Apr 2 17:12 /dev/ptp1
ddstreet@ddstreet-test:~$ grep . /sys/class/ptp/*/clock_name
/sys/class/ptp/ptp0/clock_name:hyperv
/sys/class/ptp/ptp1/clock_name:mlx5_p2p

ddstreet@ddstreet-test:~$ dpkg -l systemd|grep systemd
ii systemd 229-4ubuntu21.31 amd64 system and service manager
ddstreet@ddstreet-test:~$ ls -l /dev/ptp*
crw------- 1 root root 247, 0 Apr 2 17:20 /dev/ptp0
crw------- 1 root root 247, 1 Apr 2 17:20 /dev/ptp1
lrwxrwxrwx 1 root root 4 Apr 2 17:20 /dev/ptp_hyperv -> ptp0
ddstreet@ddstreet-test:~$ grep . /sys/class/ptp/*/clock_name
/sys/class/ptp/ptp0/clock_name:hyperv
/sys/class/ptp/ptp1/clock_name:mlx5_p2p