bug#26931: GuixSD rebooting fails when tmux is running

[Ludovic Courtès]

Leo Famulari <address@hidden> skribis:

> When tmux is running, GuixSD fails to reboot. No more details yet, but
> confirmation from at least 3 users:

What does /var/log/shepherd.log show around the time where you hit
“halt”?

I get something like this:

--8<---------------cut here---------------start------------->8---
18:06:26 Service mcron has been stopped.
18:06:26 sending all processes the TERM signal
18:06:30 all processes have been terminated
18:06:30 Service user-processes has been stopped.
18:06:30 Service file-systems has been stopped.
18:06:30 Service file-system-/dev/pts has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/memory has been stopped.
18:06:30 system-error("umount" "~S: ~A" ("/run/user" "Device or resource busy") 
(16))
18:06:30 Service file-system-/run/user has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/blkio has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/cpuacct has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/freezer has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/cpu has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/hugetlb has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/devices has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/elogind has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/cpuset has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup/perf_event has been stopped.
18:06:30 Service file-system-/sys/fs/cgroup has been stopped.
18:06:30 Service file-system-/boot/efi has been stopped.
18:06:30 Service file-system-/run/systemd has been stopped.
18:06:30 Service file-system-/gnu/store has been stopped.
18:06:30 Service udev has been stopped.
18:06:30 Service file-system-/dev/shm has been stopped.
18:06:30 closing log
--8<---------------cut here---------------end--------------->8---

“closing log” is the last message the Shepherd writes before calling
reboot(2).

Ludo’.