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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1934462 Title: Ability to hibernate lost after update of kernel version Status in linux package in Ubuntu: Incomplete Bug description: Hi! I have Ubuntu 18.04 installed (due to Petalinux requirement) where Hibernation so far at least worked. Recently I got an update notification, confirmed it and am now running on this version: $ uname -a Linux datatel-XMG-CORE-M19-GTX-1650 5.4.0-77-generic #86~18.04.1-Ubuntu SMP Fri Jun 18 01:23:22 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux Before the update, using kernel 5.4.0.74 a "sudo hibernate" worked fine. Now it does not, instead returns a black screen for a sec and then this notice: hibernate:Warning: Tuxonice binary signature file not found. In addition the system hangs for a couple of seconds. Looking for help on that I saw several posts proposing to adapt /sys/power/state, adding "disk" and "standby" to it. I have tried that in any possible way I could think of, using vi directly on the file (as su), writing it with an "echo... > /sys/power/state" command, making up a file in my home and then copying to that location using "sudo cp ~/<file> /sys/power/state". Neither of this works. I always get a permission error. I have even tried to "chmod" all the directories to "777" and that was successful looking at "ls -la" but won't help either. Maybe I should mention that my Ubuntu installation resides on a USB- Stick. I posted this on Ask Ubuntu and was asked to file a bug report. So here you are. Thanks. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.44 ProcVersionSignature: Ubuntu 5.4.0-77.86~18.04.1-generic 5.4.119 Uname: Linux 5.4.0-77-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.24 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: ubuntu:GNOME Date: Fri Jul 2 09:16:59 2021 InstallationDate: Installed on 2021-05-11 (51 days ago) InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: ubuntu-release-upgrader UpgradeStatus: No upgrade log present (probably fresh install) VarLogDistupgradeAptlog: Log time: 2021-05-17 11:54:33.809310 Starting pkgProblemResolver with broken count: 0 Starting 2 pkgProblemResolver with broken count: 0 Done Log time: 2021-05-17 11:55:10.776569 -------------------------------------------------------------------------- 7th July: Sorry to say that I have meanwhile (after a restoration of my root partition to kernel version 5.4.0-74) figured out that the above error "hibernate:Warning: Tuxonice binary signature file not found." does not come from the kernel update (to -77) but seemingly from my repartioning. What I did: I have a 256GB SanDisk USB stick where I installed Ubuntu 18.04.04 . Partitioning was: /dev/sda1 fat32 /efi 1,4G /dev/sda2 fat32 /mnt/UDISK 55,6G /dev/sda3 ext4 / 140G /dev/sda4 swap 35,9G I made a backup of sda3 with dd deleted sda2 und sda3 with gparted and increased the size of sda2 to the max then, partitioning: /dev/sda1 fat32 /efi 1,4G /dev/sda2 ext4 / 195,6G /dev/sda4 swap 35,9G I restored (former) sda3 to now sda2 tried to reboot, got a boot problem because /etc/fstab still contained the old sda2 entry, removed that and the system booted apparently normal. Then I made a "sudo resize2fs /dev/sda2" to get the full size of the partition for the file system and it seemed to work fine. BUT: Now hibernation does not work any more and produces the above error - before the Software Updater came forward. 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