I believe /sbin/hwclock is the default tool for manually setting the
hwclock in Linux. I’m nervous that higher level workloads may depend on
the correct functioning of the /sbin/hwclock tool for their successful
operation.
The /sbin/hwclock tool is shipped with the util-linux package.
Adding util-linux as impacted and assigning to Foundations team to
comment on whether the /sbin/hwclock tool not operating on witherspoon
is a serious issue or not.
** Also affects: util-linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: ubuntu-power-systems
Assignee: bugproxy (bugproxy) => Canonical Foundations Team
(canonical-foundations)
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https://bugs.launchpad.net/bugs/1837443
Title:
[Power9][Witherspoon dd2.3] unable to set hwclock
Status in The Ubuntu-power-systems project:
Triaged
Status in util-linux package in Ubuntu:
New
Bug description:
On the upgraded witherspoon Power9 system we are unable to set
hwclock.
ubuntu@bobone:~$ uname -a
Linux bobone 5.0.0-20-generic #21-Ubuntu SMP Mon Jun 24 09:31:42 UTC 2019
ppc64le ppc64le ppc64le GNU/Linux
ubuntu@bobone:~$ cat /etc/issue
Ubuntu 19.04 \n \l
ubuntu@bobone:~$ date
Mon Jul 22 18:25:04 UTC 2019
ubuntu@bobone:~$ sudo /sbin/hwclock --set --date "2004/11/22 04:10:00"; sleep
5s; sudo /sbin/hwclock
2019-07-22 18:25:26.799805+00:00
ubuntu@bobone:~$
ubuntu@bobone:~$ sudo /sbin/hwclock --set --date "2004/11/22 04:10:00"; sleep
5s; sudo /sbin/hwclock --verbose
hwclock from util-linux 2.33.1
System Time: 1563820048.938797
Trying to open: /dev/rtc0
Using the rtc interface to the clock.
Last drift adjustment done at 1101096600 seconds after 1969
Last calibration done at 1101096600 seconds after 1969
Hardware clock is on UTC time
Assuming hardware clock is kept in UTC time.
Waiting for clock tick...
ioctl(4, RTC_UIE_ON, 0): Invalid argument
Waiting in loop for time from /dev/rtc0 to change
...got clock tick
Time read from Hardware Clock: 2019/07/22 18:27:29
Hw clock time : 2019/07/22 18:27:29 = 1563820049 seconds since 1969
Time since last adjustment is 462723449 seconds
Calculated Hardware Clock drift is 0.000000 seconds
2019-07-22 18:27:28.877732+00:00
ubuntu@bobone:~$
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