cat /sys/power/disk yields [disabled] cat /sys/power/state yields freeze mem
Trying to change any of them (e.g. the "state" file to "mem freeze disk standby") with sudo vi /sys/power/state results in vi in the notice: '"/sys/power/state" E514: write error (file system full) WARNING: Original file may be lost or damaged don't quit the editor until the file is successfully written! ' Trying to change and save the file with sudo nano /sys/power/state yields the message: '[ Error writing /sys/power/state: Invalid argument ]' Any other operation on these files like mv, cp, chmod result in a: "Operation not permitted" error. So why can I not change/write any of these files though the permissions on them suggest it?? At least I alreay solved my problem with "sudo hibernate": The root cause that this did not work is that "Secure Boot" was enabled (again - for whatever reason) in my UEFI/BIOS. After having switched it off (again) hibernation works again. BUT: Even after having switches off "Secure Boot" I still can not write any of the files in /sys/power. No matter what I do or how I try! This remains and seems independant of the kernel version. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1934462 Title: Ability to hibernate lost after update of kernel version To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1934462/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
