Hi, I just tried to hibernate a system which I upgraded from bullseye to bookworm and it resumed and never reached the off state. I don't recall that there were hibernation problems in bullseye on that system.
I tried out of KDE Plasma, but I also tried from the cmdline root@h370:~# echo disk > /sys/power/state -bash: echo: write error: Device or resource busy root@h370:~# Since https://wiki.debian.org/Hibernation looks somewhat outdated (describes Jessie and Lenny configurations), I followed Arch and kernel documentation https://wiki.archlinux.org/title/Power_management#Power_management https://docs.kernel.org/admin-guide/pm/sleep-states.html? highlight=image_size#basic-sysfs-interfaces-for-system-suspend-and-hibernation Both # systemctl hibernate and # echo disk > /sys/power/state do not bring the system in hibernate mode (=suspend to disk). The config I see on my system: root@h370:~# swapon NAME TYPE SIZE USED PRIO /dev/dm-2 partition 15.9G 8.1G -2 /dev/zram0 partition 256M 256M 100 root@h370:~# cat /sys/power/resume 254:2 root@h370:~# lsblk /dev/dm-2 NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS b370--vg-swap_1 254:2 0 15.9G 0 lvm [SWAP] root@h370:~# cat /proc/cmdline BOOT_IMAGE=/vmlinuz-6.1.0-7-amd64 root=/dev/mapper/b370--vg-root ro quiet root@h370:~# cat /sys/power/image_size 13375987712 root@h370:~# Any hints are welcome Thanks Rainer -- Rainer Dorsch http://bokomoko.de/
