This issue arises whenever system-logind access the `/sys/power/disk`
file. Reproduce using `cat /sys/power/disk` and you'll find
kernel: Lockdown: cat: hibernation is restricted; see man
kernel_lockdown.7
in the kernel log. This is per-se harmless but does flood the log with
garbage.
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https://bugs.launchpad.net/bugs/1896137
Title:
syslog flooded with "Lockdown: systemd-logind: hibernation is
restricted; see man kernel_lockdown.7"
Status in linux package in Ubuntu:
Expired
Bug description:
When I close the lid on my laptop, syslog goes crazy with the message
systemd-logind: hibernation is restricted; see man kernel_lockdown.7
repeated ad infinitum, using up all the CPU and GBs of disk space. I
am not even trying to hibernate; everything in /etc/systemd/login.conf
is commented out. So nothing much should happen when I close the lid,
but systemd is trying to kill me with these messages. I am running
Ubuntu 20.04.
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