Description of problem:
Last message seen on system restart is watchdog did not stop and the reboot hangs.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
We have four systems that hang like this since updating to Fedora 24. We have tried init 6 and reboot. Also reboot from Gnome greeter menu for restart.We have had at least 3 kernel updates and issue has persisted. The only out is to use the reset button.
Prevents any type of remote administrative support that would require a reboot.
Picked dracut as component since it is mentioned just prior to the watchdog message.
What has changed in the boot process that would cause this issue between release 23 and release 24? We have checked the boot log but see nothing more than what goes to the screen.
watchdog: watchdog0: watchdog did not stop
Temporary work around has been to change the systemd watch dog default timeout of 10 minutes to 10 seconds which has restored the normal reboot time.
Please try to provide more debugging info following:
Here is what I find from journalctl:
Aug 22 19:20:34 redwood systemd: Reached target Shutdown.
Aug 22 19:20:34 redwood systemd: Reached target Final Step.
Aug 22 19:20:34 redwood systemd: Starting Reboot...
Aug 22 19:20:34 redwood systemd: Shutting down.
Aug 22 19:20:34 redwood lvm: 6 logical volume(s) in volume group "fedora
Aug 22 19:20:34 redwood systemd: Hardware watchdog 'iTCO_wdt', version 0
Aug 22 19:20:34 redwood systemd: Set hardware watchdog to 10min.
Aug 22 19:20:34 redwood kernel: watchdog: watchdog0: watchdog did not stop!
Aug 22 19:20:34 redwood systemd-shutdown: Sending SIGTERM to remaining proces
Aug 22 19:20:34 redwood dnsmasq: exiting on receipt of SIGTERM
Aug 22 19:20:34 redwood systemd-journald: Journal stopped
-- Reboot --
Looked above this output and found nothing that indicated an issue. But maybe I miss filed this report and it should be against systemd instead? Still learning how to find info in journal logs.
Please try the second debug method of comment #2
OK, I looked at that before and just see a laundry list of I'm assuming dracut command options of which none I had any idea of what to do with. So I have now tried the very beginning of that section doing this:
# mkdir -p /run/initramfs/etc/cmdline.d
# echo "rd.debug rd.break=pre-shutdown rd.break=shutdown" > /run/initramfs/etc/cmdline.d/debug.conf
# touch /run/initramfs/.need_shutdown
Which appeared to do nothing. I will need more specific instructions so that I can provide the information you need.
This might be caused by the same bug as:
One thing to try, if that is the case:
before reboot, do:
# rm -f /run/udev/control
Thanks for the information. I tried the removal /run/udev/control but it did not change or fix the issue we are seeing.
Happy to report that this issue is fixed in Fedora 25 kernel 4.8.8-300.
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