Bug#892321: attempts to suspend failing after crash

[Michael Biebl]

On Sat, 17 Mar 2018 03:07:45 +0100 Michael Biebl <biebl at debian.org> wrote:
> On Thu, 8 Mar 2018 10:02:32 +0000 Daniel Pocock <daniel at pocock.pro> wrote:
> > Package: systemd
> > Version: 232-25+deb9u1
> > Severity: important
> > 
> > 
> > Laptop was connected to a Thunderbolt dock, lid closed, using desktop
> > monitor and keyboard, everything connected through the dock.  It is a
> > laptop with encrypted LVM and swap on LVM.
> > 
> > Laptop's thunderbolt cable was bumped very slightly without coming out
> > completely and then pushed back in.  As the lid was down, it appears the
> > laptop tried to suspend
> > 
> > It didn't really suspend though, it became frozen with a blank screen.
> > 
> > After a hard reboot, every subsequent attempt to close the lid or undock
> > also failed, the screen would go blank and it wouldn't come back.
> > 
> > journalctl and /var/log/messages provided no clues.
> > 
> > Guessing it was a problem with the swap partition, tried the following:
> > 
> >  swapoff /dev/mapper/vg00--vg-swap_1
> >  mkswap /dev/mapper/vg00--vg-swap_1
> > mkswap: /dev/mapper/vg00--vg-swap_1: warning: wiping old swap signature.
> > Setting up swapspace version 1, size = 23.8 GiB (25513947136 bytes)
> > no label, UUID=
> > swapon /dev/mapper/vg00--vg-swap_1
> > 
> > In this case, the swap partition is named in /etc/fstab, not the UUID. 
> > For somebody with the UUID in fstab it would be necessary to update
> > there too and also run update-initramfs
> > 
> > This is not hard for an experienced user to resolve but very annoying as
> > you only discover you have a problem after the second attempt to sleep.
> > 
> > Can systemd or whatever else is involved in the suspend/sleep mechanism
> > be improved to detect problems like this, give some kind of error to the
> > user and maybe even help them automatically correct it?
> 
> It's unclear to me what exactly your specific problem is/how and how
> systemd should detect that.

Ping

How is your suspend partition relevant for suspend to ram?
Are you actually using hibernate (suspend-to-disk) where a properly
setup swap partition is important?

Michael

-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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