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Hibernation issue with 4.19.0-4-amd64 on Debian testing


I am not subscribed to the list, so I would appreciate being cc'ed on any

I have an issue with hibernation on my Lenovo ThinkPad laptop (E531) that
runs the Debian testing stream. The default kernel is 4.19.0-4-amd64 and I
use the KDE Plasma desktop.

The laptop will hibernate once after a fresh start using the default
kernel. But the second time, it refuses to hibernate and I have to do a
hard reboot.

With the other kernel available on the system - as you are all aware, apt
retains the latest two kernels for boot purposes - 4.19.0-2-amd64, the
behaviour is somewhat different.

As with the 4.19.0-4-amd64 kernel, this 4.19.0-2-amd64 kernel also allows
the laptop to hibernate once and resume. On the second time, it refuses to

But if I select the 4.19.0-2-amd64 kernel afresh when I resume from
hibernation, the laptop will hibernate without any issue.

Otherwise, if I just let it return from hibernation without any
intervention, even though the system is using the 4.19.0-2-amd64 kernel,
it does not hibernate when I try to put it into this state and I have to
do a hard reboot.

Has anyone seen this kind of behaviour?

(Sam Varghese)