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    Black screen after logout

    Don't get a chance to log in again after logout. Please advise

    #2
    It is a multiboot PC, but this is not at boot time, it is when I log out from KDE session. Don't get the login screen.

    Sent from my Nexus 9 using Tapatalk

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      #3
      I have set it to autologin, and this functions well if I reboot. It is when I log out from the session, that I get a black screen, and it stays black forever. What I do is tap Ctrl-Alt-F2, log in to the console, and tap "sudo init 6" to reboot. Or I could press the power button for about 6 seconds to force the PC to switch off. Is there a keyboard command that could force the KDE login screen to appear? Or could I change to another login manager (while still logging in to KDE)?

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        #4
        Thanks Teunis for baring with me. When I shut down it performs perfectly normal, there is some text on the screen, but not error messages.

        Applied the two commands in a terminal and in a (Ctrl-Alt-F4) konsole with the same result: Black screen for a moment, Kubuntu logo for a couple of seconds and PC switched off. No messages.

        This might be connect: After screen lock (Ctrl-Alt-F4) I enter the password on the unlock screen and get the error message that "unlocking failed". For this reason I have disabled everything in Energy Savings exept Button events handling: "Prompt log out dialogue", and in Desktop Behavior / Screen Locking I have disabled Lock screen automatically.

        Before you ask, yes I made a fresh install of 15.10 and did not have this particular problem initially, Instead I had the Plasma 5 problem of not being able to unify my two displays, see https://forum.kde.org/viewtopic.php?f=289&t=126539 both in 15.04 and 15.10. After about a month with 15.10 I gave up on the second monitor (TV). About the same time this problem started, but I am not implying any connection between the two problems. Actually I tried deleted ~/.config/plasma-org.kde.plasma.desktop-appletsrc but the present problem was still there.

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          #5
          Correction: When I shut down it performs perfectly normal, there is no text or error message on the screen. Black for a while then the Kubuntu logo and then the PC switches off (I mixed up with the shut down of my Suse partition)

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            #6
            I am leaning towards password or rather polkit problem. For instance cannot save changes to LoginScreen (SDDM) / Advanced - or to Manage User Accounts. Guess I will make do with openSUSE for another three months and then give K16.04 a try. Thanks

            BTW re crystal balls etc: I do think that my initial description of my problem was crystal clear!

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