Well, ok.
my line now looks like this:
GRUB_DEFAULT=saved
GRUB_TIMEOUT=5
GRUB_TIMEOUT_STYLE=hidden
GRUB_DISTRIBUTOR="Manjaro"
GRUB_CMDLINE_LINUX_DEFAULT="resume=UUID=67240561-8d53-415f-9b01-082872cc06dd resume_offset=153600"
GRUB_CMDLINE_LINUX=""
But still no success.
Going into sleep / hibernation, it still freezes.
I just found the following post…is there anything which can help?
I tested the command
systemctl hibernate
which I found there. When I tried to resume from hibernation it just restarted (–> boot menu) and wanting to start manjaro again it then crashes.
After powering it off, I was able to boot normally.