Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-meta-kvm (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1950878
Title:
Enable ptp_kvm module for time synchronization
Status in linux-meta-kvm package in Ubuntu:
Confirmed
Bug description:
I want to use ptp_kvm module for time synchronization.
reference: https://opensource.com/article/17/6/timekeeping-linux-vms
tested on ubuntu kvm image: https://cloud-
images.ubuntu.com/impish/20211103/impish-server-cloudimg-amd64-disk-
kvm.img
```
ubuntu@test:~$ lsb_release -rd
Description: Ubuntu 21.10
Release: 21.10
ubuntu@test:~$ dpkg -l linux-image-kvm
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===============-=============-============-=======================================
ii linux-image-kvm 5.13.0.1005.5 amd64 Linux kernel image for virtual
systems.
ubuntu@test:~$ grep -i ptp /boot/config-5.13.0-1005-kvm
CONFIG_HAVE_OPTPROBES=y
CONFIG_NF_CONNTRACK_PPTP=m
CONFIG_NF_NAT_PPTP=m
# PTP clock support
# CONFIG_PTP_1588_CLOCK is not set
# end of PTP clock support
```
use case
1. load ptp_kvm module
2. udev make /dev/ptp_kvm symlink to /dev/ptpX by
/usr/lib/udev/rules.d/50-udev-default.rules
3. chrony use /dev/ptp_kvm for time synchronization
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