I am running KDE Neon with latest updates (Plasma 5.8.3 at this moment). Every time I start a new session, when I return to the initial one (ctrl+alt+F7) I get black screen saying that screen locker is broken and I should go to virtual terminal and run "loginctl unlock-sessions". Here is my log: lock called Lock window Id: 25165846 CreateNotify: 25165846 UnmapNotify: 25165846 CreateNotify: 46137347 CreateNotify: 46137350 CreateNotify: 46137352 CreateNotify: 46137354 CreateNotify: 46137356 MapNotify: 46137354 MapNotify: 25165846 CreateNotify: 46137358 powerdevil: ACTIVE SESSION PATH CHANGED: "/" powerdevil: Switched to inactive session - leaving unchanged KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = kscreenlocker_greet path = /usr/lib/x86_64-linux-gnu/libexec pid = 2092 KCrash: Arguments: /usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet --immediateLock --graceTime 5000 --ksldfd 73 UnmapNotify: 46137354 UnmapNotify: 25165835 UnmapNotify: 25165835 powerdevil: ACTIVE SESSION PATH CHANGED: "/org/freedesktop/login1/session/_33" powerdevil: Current session is now inactive CreateNotify: 46137347 CreateNotify: 46137350 CreateNotify: 46137352 CreateNotify: 46137354 CreateNotify: 46137356 MapNotify: 46137354 uhoh! duplicate! uhoh! duplicate! CreateNotify: 46137358 KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = kscreenlocker_greet path = /usr/lib/x86_64-linux-gnu/libexec pid = 2154 KCrash: Arguments: /usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet --immediateLock --graceTime 5000 --ksldfd 64 UnmapNotify: 46137354 CreateNotify: 46137347 CreateNotify: 46137350 CreateNotify: 46137352 CreateNotify: 46137354 CreateNotify: 46137356 MapNotify: 46137354 uhoh! duplicate! uhoh! duplicate! CreateNotify: 46137358 KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = kscreenlocker_greet path = /usr/lib/x86_64-linux-gnu/libexec pid = 2174 KCrash: Arguments: /usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet --immediateLock --graceTime 5000 --ksldfd 64 UnmapNotify: 46137354 QXcbConnection: XCB error: 3 (BadWindow), sequence: 15555, resource id: 46137354, major code: 20 (GetProperty), minor code: 0 QXcbConnection: XCB error: 3 (BadWindow), sequence: 15556, resource id: 46137354, major code: 20 (GetProperty), minor code: 0 QXcbConnection: XCB error: 3 (BadWindow), sequence: 15557, resource id: 46137354, major code: 20 (GetProperty), minor code: 0 CreateNotify: 56623107 CreateNotify: 56623110 CreateNotify: 56623112 CreateNotify: 56623114 CreateNotify: 56623116 MapNotify: 56623114 CreateNotify: 56623118 KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = kscreenlocker_greet path = /usr/lib/x86_64-linux-gnu/libexec pid = 2183 KCrash: Arguments: /usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet --immediateLock --graceTime 5000 --ksldfd 64 UnmapNotify: 56623114 powerdevil: ACTIVE SESSION PATH CHANGED: "/org/freedesktop/login1/session/_34" powerdevil: Current session is now inactive powerdevil: ACTIVE SESSION PATH CHANGED: "/org/freedesktop/login1/session/_32" powerdevil: Current session is now active powerdevil: Can't contact ck powerdevil: We are now into activity "6bcf02db-444e-4ca6-96f8-9d206adb7798" powerdevil: () () powerdevil: () () powerdevil: Loading profile for plugged AC powerdevil: Activity is not forcing a profile powerdevil: powerdevil: Loading timeouts with 600000 CreateNotify: 56623107 kdeinit5: Got SETENV 'KDE_MULTIHEAD=false' from launcher. CreateNotify: 58720259 Initializing "kcm_input" : "kcminit_mouse" kdeinit5: Got SETENV 'XCURSOR_THEME=breeze_cursors' from launcher. CreateNotify: 56623112 QXcbConnection: XCB error: 3 (BadWindow), sequence: 16761, resource id: 56623112, major code: 18 (ChangeProperty), minor code: 0 kdeinit5: Got SETENV 'KDE_MULTIHEAD=false' from launcher. Initializing "kcm_input" : "kcminit_mouse" kdeinit5: Got SETENV 'XCURSOR_THEME=breeze_cursors' from launcher. CreateNotify: 58720264 QXcbConnection: XCB error: 3 (BadWindow), sequence: 16950, resource id: 58720264, major code: 18 (ChangeProperty), minor code: 0 powerdevil: ACTIVE SESSION PATH CHANGED: "/" powerdevil: Switched to inactive session - leaving unchanged powerdevil: ACTIVE SESSION PATH CHANGED: "/org/freedesktop/login1/session/_35" powerdevil: Current session is now inactive Grab Released powerdevil: ACTIVE SESSION PATH CHANGED: "/org/freedesktop/login1/session/_32" powerdevil: Current session is now active powerdevil: Can't contact ck powerdevil: We are now into activity "6bcf02db-444e-4ca6-96f8-9d206adb7798" powerdevil: () () powerdevil: () () powerdevil: Loading profile for plugged AC powerdevil: Activity is not forcing a profile powerdevil: powerdevil: Loading timeouts with 600000 kdeinit5: Got SETENV 'KDE_MULTIHEAD=false' from launcher. Initializing "kcm_input" : "kcminit_mouse" kdeinit5: Got SETENV 'XCURSOR_THEME=breeze_cursors' from launcher. QXcbConnection: XCB error: 3 (BadWindow), sequence: 17902, resource id: 56623112, major code: 18 (ChangeProperty), minor code: 0 kdeinit5: Got SETENV 'KDE_MULTIHEAD=false' from launcher. Initializing "kcm_input" : "kcminit_mouse" kdeinit5: Got SETENV 'XCURSOR_THEME=breeze_cursors' from launcher. QXcbConnection: XCB error: 3 (BadWindow), sequence: 18424, resource id: 56623112, major code: 18 (ChangeProperty), minor code: 0
Here is the link to KDE Neon forum where I posted about this problem initially: https://forum.kde.org/viewtopic.php?f=309&t=137086
Are you starting a new session with same user name?
No, different user.
I'm having this problem as well with Kubuntu, Neon and OpenSUSE. I have 2 sessions running with different user accounts, and this problem occurs most of the time I switch between them. Searching online some reported that this might be a problem with: - a full root partition - tested and not the case - a full tmp partition - tested and not the case - a root btrfs partition reporting wrong space info - tested with both btrfs and ext4 and not the case I would appreciate it if you could confirm this issue and try to resolve it. A workaround is to disable the screen locker but I can only do that at home not in an office environment. Thanks.
I am not shure if it is the same problem, since it does not involve a new session (I think). But lately my lock screen is broken too. The normal log in works fine. But once I lock my system or let it lock due to inactivity, I have to reboot the system. It also tells me to put in "loginctl unlock-sessions", which does not help. Currently I am on KDE 5.10, that is running on neon stable dev. I don't know since when I have this problem, but it can't be that long. Usually I won't lock my system at home, since I don't need to.
Maximilian, kscreenlocker 5.10.0 regression is tracked at bug 380491. Please check if it is fixed for you with 5.10.1, open a new ticket, if you still see an issue.
(In reply to Christoph Feck from comment #6) > Maximilian, kscreenlocker 5.10.0 regression is tracked at bug 380491. Please > check if it is fixed for you with 5.10.1, open a new ticket, if you still > see an issue. I'm having the same problem as Maximiliam. It is not related to bug #380941 because there is no any password request, just a black screen with the folowing message "The screen locker is broken and unlocking is not possible anymore". The screenlocker background image is showed three times before the message.
I'm using plasma 5.10.2 from Arch.
*** This bug has been marked as a duplicate of bug 407305 ***