Hello Magic Banana,
Thank you for your detailled message!
So:
> You can boot the previous version of the kernel from the "Advanced options"
(or whatever it is called), an entry in GRUB's menu (displayed before the
operating system starts)
I have booted to my previous system, which is 4.4.0-139-lowlatency
> and confirm that the latest version of the 4.4 kernel is the problem.
the suspend functionality worked fine
> you could, of course, stick to that version, e.g., removing both
"linux-image-4.4.0-142-lowlatency" and "linux-image-lowlatency" (and
"linux-lowlatency", if installed).
how can I remove my actual OS, which is 4.4.0-142-lowlatency?
> However, not having an up-to-date kernel is security-wise, concerning.
That is why, if I were you, I would install the latest 4.15 available in the
repository, reboot, and see if suspend works. If you really want a
"lowlatency" kernel (e.g., for music creation),
but the way, what does lowlatency mean, is there any relation about music
creation?
> then install the "linux-lowlatency-hwe-8.0" package (in Trisquel's
repository)
what is linux-lowlatency-hwe-8.0, what are the differences?
> Otherwise, install "linux-generic-hwe-8.0".
why on my system, do I have only linux-lowlatency-[...] and not
linux-generic-[...], is there any difference?
Merci Magic Banana for your nice support :)