Thx for information from Kai-Heng Feng. After disable secure boot,
kernel lockdown is inactive. And then “disk” appear in /sys/power/state,
and hibernation function normal.
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Public bug reported:
cat /sys/power/state
freeze mem
As a result, hibernate-disk is failed to work.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-33-generic 4.15.0-33.36
ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
Uname: Linux 4.15.0-33-generic x86_64
Ap
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