I enabled hibernation in a few computers by adding /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla with this content:
[Re-enable hibernate by default]
Identity=unix-user:*
Action=org.freedesktop.upower.hibernate
ResultActive=yes
[Re-enable hibernate by default for login1]
Identity=unix-user:*
Action=org.freedesktop.login1.hibernate
ResultActive=yes
[Re-enable hibernate for multiple users by default in logind]
Identity=unix-user:*
Action=org.freedesktop.login1.hibernate-multiple-sessions
ResultActive=yes
It worked well till a recent update on my ASUS X200MA.
The menu item disappeared and also the com.ubuntu.enable-hibernate.pkla is not there any more. I added it again, but it did not change anything.
Also pm-hibernate command does not do anything and dmesg shows nothing.
How can I find out what has happened?
On other computers hibernation still works.
答案1
After some effort to get a solution I recalled that recently I activated Secure Boot in UEFI for testing purposes.
It was enabled before, but it was not active because I did not enroll the keys.
After that the "Hibernate" menu item disappeared.
I have no idea how Secure Boot is related to the hibernation option, but after I disabled Secure Boot, it works again.