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I have recently upgraded a few of our Ubuntu machines to Ubuntu 18.04. I have managed to configure everything and everything seems to be working fine, apart from the lock screen.

It seems that if the computer is left idle for longer periods of time the lock screen will not accept the credentials any more and restart of gdm or the computer has to be done for it to work again.

I found this bug report which seems to describe the problem.

Can anyone advise me if there has been any work on this or if anyone has found a workaround?

Zanna
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Oscar
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2 Answers2

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According to comment #10 by nomike (michael-postmann) on the bug report

When using sddm or lightdm I don't have this issues (though I have others).

Therefore, it seems that the only workaround is to use other Display Manager such as lightdm. To install lightdm, run:

sudo apt install lightdm

and follow on screen instructions.

Kulfy
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So I have found a fix by adding below line to my sssd.conf

ad_gpo_map_interactive = +unity, +cron, +gdm3, +gdm

This seems to fix issues I had with GDM and also issues that I only just noticed where users couldn't run cron jobs

Oscar
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