[Bug 1896137] Re: syslog flooded with "Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7"

[JP Guisset]

I am using an old laptop as server. The internal screen has been
removed. When no external display is connected, the system quickly goes
to sleep mode. To avoid this I had masked sleep.target and
suspend.target, which resulted in the described repeated "systemd-
logind: hibernation is restricted; see man kernel_lockdown.7" and 80%
load by systemd-logind.

I could avoid suspend without triggering this issue by modifying /etc/systemd/logind.conf:
	HandleSuspendKey=ignore
	HandleHibernateKey=ignore
	HandleLidSwitch=ignore
	HandleHibernateKey=ignore

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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 systemd 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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