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fedora 28 switch user breaks GDM

asked 2018-06-09 05:21:26 -0500

zeus338 gravatar image

For a while now, I have encountered problems with the multi-user environment on fedora. I'm running f28 and gnome shell 3.28.2 on a Dell xps15 2017 9560, using wayland.

If I am logged in normally, then go to the top right corner and select switch user, I can do so (once!) and log in as a different user. If I log out from this user account, I see GDM and want to login as the previous user - I type my password, and GDM hangs.

Now I can hit CTRL+ALT+F2 and then I see the lock screen, where strangely I am able to unlock. But then, successfully unlocked, the system behaves strangely (e.g. display brightness is no longer adjustable). Only a restart can fix this issue.

I believe this can be a problem for less experienced users, If they do not know about the ctrl+alt+f keybinding.

I tried replacing GDM with lightDM, but then I have no lock screen anymore and cannot change users at all (but that is a different issue)

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I have the same problem when I try to switch users

ezq gravatar imageezq ( 2018-06-27 07:40:45 -0500 )edit

Same problem here, it's really annoying, especially when several users of the machine are not really willing to switch using CTRL+ALT+F<x>. As suggested in an answer here, I will try to add some debugging info and see if someone can help.

This is happening on two of my machines running Fedora 28 with the latest upgrades. No Nvidia or Radeon here, my graphics controller is Intel.

Hoggins gravatar imageHoggins ( 2018-07-25 13:10:47 -0500 )edit

Has anyone found a solution to this problem? I have been experiencing the same issue since upgrade to 28. 4 members of my family use my home machine and it is quite annoying to have to reboot anytime a user logs off.

joefred gravatar imagejoefred ( 2018-08-15 11:51:11 -0500 )edit

I am having the same issues, I filed a bug:

The workaround I have been using is to make sure you log off before allowing another user to log in. The issue seems to arise when re-joining an existing graphical session.

I would suggest we all vote for the bug report but I don't seem to see a way to do that.

drdec gravatar imagedrdec ( 2018-08-16 13:59:19 -0500 )edit

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answered 2018-07-14 17:58:07 -0500

morganizer gravatar image

I am experiencing the same problem since upgrading to F28. I am on an AMD/Radeon system.

I agree it is an issue with GDM, Like you, I switched to lightDM as a workaround, but lightDM is really primitive, doesn't auto lock screen etc. I did find an add-on that lets me manually lock a session and log in as another.

I have seen this reported as a bug in many places, but I don't see any good troubleshooting going on. I would happily work with someone to gather good logs, I have searched journalctl when I had GDM unlock issues going on, but couldn't see anything that seemed useful.

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This should be a comment to the question; it is not an answer.

wallyk gravatar imagewallyk ( 2018-08-15 13:18:52 -0500 )edit

@wallyk imposible more than 600 characters...

hhlp gravatar imagehhlp ( 2018-08-16 07:31:37 -0500 )edit

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Asked: 2018-06-09 05:21:26 -0500

Seen: 587 times

Last updated: Aug 15 '18