[Bug 1838046] Re: Autofs with CIFS prevents laptop suspend

[Günter Knauer]

I can confirm just now the recreation of this suspend/hibernate problem having a CIFS mount to a FRITZ.NAS. Using Ubuntu 18.04.3 LTS, Linux version 4.15.0-72-generic (buildd at lcy01-amd64-026) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) - Lenovo W510 - Only the CIFS unmount before suspend/hibernate will avoid a system freeze! Will this be fixed in coming Linux versions?
Regard, Günter

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Title:
  Autofs with CIFS prevents laptop suspend

Status in autofs package in Ubuntu:
  Triaged

Bug description:
  I have autofs set to mount two cifs partitions
  one from a local server, the second from a virtualbox machine in my laptop
  when I stop the virtual machine and try to suspend, I got a message saying: Freezing of task failed after xx seconds
  after ~10 seconds, the screen goes off, it appears that the laptop do a partial suspend (the power light doesn't blink), if I press the power button, the laptop wakes up, and sometimes I get a new gnome session (all my windows colsed and start with new gnome)

  If I sudo systemctl stop autofs.service and the suspend, everything
  works good.

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