If you use it in verbose mode it works. It could be that it is slow to read from the rtc and the verbose mode just enough time to sync?
ubuntu@tiselius:~$ sudo /sbin/hwclock --set --date "2004/10/25 04:10:00"; sudo /sbin/hwclock --verbose hwclock from util-linux 2.33.1 System Time: 1557759815.855012 Trying to open: /dev/rtc0 Using the rtc interface to the clock. Last drift adjustment done at 1098677400 seconds after 1969 Last calibration done at 1098677400 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: 2004/10/25 04:10:01 Hw clock time : 2004/10/25 04:10:01 = 1098677401 seconds since 1969 Time since last adjustment is 1 second Calculated Hardware Clock drift is 0.000000 seconds 2004-10-25 04:09:59.806484+00:00 ubuntu@tiselius:~$ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802233 Title: hwclock test failed on Power9 due to 0.x sec differences / time out waiting for time change To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1802233/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
