Bug 1955825

Summary: "Switch User" functionality is missing from Kickoff and lock screen
Product: [Fedora] Fedora Reporter: Rupert Pupkin <rashid_usm>
Component: plasma-desktopAssignee: KDE SIG <kde-sig>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 34CC: alvin, hygorhernane, jgrulich, kde-sig, martin, me, rdieter, than
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Hardware: x86_64   
OS: Linux   
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Description Rupert Pupkin 2021-04-30 22:06:15 UTC
Description of problem:
I have two non-admin users on my system. In the SDDM, both users are visible and I can log in as both users. But after I log in as one of the users into Plasma, the following happens: 

In Fedora 32, when I opened the application launcher, it showed an option called "Switch User" (or rather, since my localization is German, "Benutzer wechseln"). After updating to Fedora 34, this option is no longer in Kickoff. Also in Fedora 34, in the lock screen, there is no possibility to switch to another user. The only option is to enter the password for the currently logged-in user. (I am not one hundred percent sure that this option existed in Fedora 32, because I never used it.)

Version-Release number of selected component (if applicable):
plasma-desktop: 5.21.4
KDE Frameworks: 5.80.0
Qt: 5.15.2
Kernel: 5.11.16

How reproducible:

Steps to Reproduce:
1. Open Kickoff
2. Optionally, choose option "lock screen" from Kickoff

Actual results:
No option "Switch user" in Kickoff.
No way to switch user in lock screen. 

Expected results:
Option "Switch user" should be visible in Kickoff.
There should be some way to switch the user in the lock screen.

Additional info:
I have tried this out both with Plasma on Wayland and with Plasma on X11, with the same result.

Comment 1 Rex Dieter 2021-05-03 13:20:46 UTC
Fast user switching has been increasingly broken over the past few 
Fedora releases, and during Fedora Linux 34 development, it reached a 
point where it caused a nearly un-fixable release blocking bug 
(bug #1929643). We have temporarily disabled the feature by default 
until upstream has resolved the issue. 
If you wish to enable it again (at your own risk!), you may do so by 
adding the following to "~/.config/kdeglobals": 
[KDE Action Restrictions] 

Comment 2 Rupert Pupkin 2021-05-03 22:10:08 UTC
Thank you very much for the information. I have successfully used the workaround. (Haven't checked if the bug still happens.)