On 03/10/2015 03:52 AM, T.C. Hollingsworth wrote:
On Tue, Mar 10, 2015 at 1:26 AM, dwoody5654 dwoody5654@gmail.com wrote:
I have done several searches to find this info. I have searched for systemd, shutdown, rtc, hwclock and combinations of those key words and not found what I was looking for.
For F20, during shutdown is the hwclock updated?
No. systemd systems do not touch the RTC on shutdown: http://lists.freedesktop.org/archives/systemd-devel/2011-May/002526.html
Thanks for the info. Then I should be able to set the wakealarm to reboot at a specified time and shutdown. It would then reboot at the time specified in the rtc. For ex. echo 0 > /sys/class/rtc/rtc0/wakealarm echo `date -u '+%s' -d '+ 5 minutes'` > /sys/class/rtc/rtc0/wakealarm #verify alarm is set cat /proc/driver/rtc shutdown The computer never boots up. In F9 with a small change to the halt init script (halt did update the hwclock) the computer would boot as desired. After reading the link you provided I would expect the above to work in F20, but it does not at least not on my computer.
The output from the `cat /proc/driver/rtc` is: rtc_time : 10:27:11 rtc_date : 2015-03-10 alrm_time : 10:31:27 alrm_date : 2015-03-10 alarm_IRQ : yes alrm_pending : no update IRQ enabled : no periodic IRQ enabled : no periodic IRQ frequency : 1024 max user IRQ frequency : 64 24hr : yes periodic_IRQ : no update_IRQ : no HPET_emulated : no BCD : yes DST_enable : no periodic_freq : 1024 batt_status : okay
I am missing something but I cannot figure out what it is. Any ideas what I have wrong?
Thanks,
David
How can I enable/disable that behaviour during shutdown.
You could create a systemd unit that executes `hwclock --systohc` on shutdown.
-T.C.