SUMMARY: New Neon Testing Login screen does not react to 'return' key, not possible to log on. 'plasmashell not found' STEPS TO REPRODUCE: This "just happened" with my most recent update (previously KDE 5.18.4, Frameworks 5.70.0, QT 5.14.2) Now get a new, shiny, Logon Screen, I can select the user, type the password but does not react to a 'return'. Happens in a KVM guest, X11 graphics There is a 'Session' dropdown where I would expect a choice between X11 and Wayland but this is empty OBSERVED RESULTS: Stuck at the logon screen EXPECTED RESULTS: The 'return' log you on SOFTWARE/OS VERSIONS: Neon Testing Not able to logon to get the System Information version details via GUI. On boot the splash says "KDE Neon 5.18.90', Kf5-config --version says: Qt: 5.14.2 Frameworks: 5.70.0 but plasmashell --version says: Command 'plasmashell' not found ADDITIONAL INFORMATION: Not necessarily related - there was a similar behaviour with logon previously, I remember a mention that it was related to a version of QT. At this time however there was a 'submit' button on the screen that allowed you to login without the 'return'
After an apt update pkcon install plasma-workspace I get a 'Plasma' option in the 'Session' dropdown list and now able to log on. Desktop settings have been lost (black wallpaper, no right click, some widgets missing)
Following: https://old.reddit.com/r/kde/comments/gkuc9u/please_help/ Re: a "new, shiny Logon Screen", it seems: That's the default fallback SDDM (login screen) theme. This happens when you remove or break the Breeze theme, or try to use a 3rd-party SDDM theme that's incompatible with the versions of Qt, KDE Frameworks, and KDE Plasma installed on your machine. and try sudo apt install sddm-theme-breeze Yes, in this case this got the 'familiar' logon screen back.
And also: https://old.reddit.com/r/kde/comments/gk9k2n/after_upgrade_kde_neon_developer_unstable_is/ Which seems to apply to Testing as well as Developer... The fix pkcon install plasma-desktop recovered the wallpaper, desktop behaviour, widgets I was using...
Looks like Developer is still in a bit of trouble: apt update Hit:1 http://archive.ubuntu.com/ubuntu bionic InRelease Hit:2 http://archive.ubuntu.com/ubuntu bionic-updates InRelease Get:3 http://archive.neon.kde.org/unstable bionic InRelease [153 kB] Hit:4 http://security.ubuntu.com/ubuntu bionic-security InRelease Fetched 153 kB in 1s (166 kB/s) Reading package lists... Building dependency tree... Reading state information... All packages are up to date pkcon install plasma-desktop Resolving [=========================] Querying [=========================] Testing changes [=========================] Finished [=========================] Fatal error: The following packages have unmet dependencies: plasma-desktop: Depends: plasma-workspace (>= 4:5.14) but it is not going to be installed Recommends: kinfocenter (>= 4:5.14) but it is not going to be installed pkcon install plasma-workspace Resolving [=========================] Querying [=========================] Testing changes [=========================] Finished [=========================] Fatal error: The following packages have unmet dependencies: plasma-workspace: Depends: libksgrd9 but it is not going to be installed Depends: libksysguardsensorfaces1 but it is not going to be installed Depends: libprocesscore9 but it is not going to be installed Depends: libprocessui9 but it is not going to be installed pkcon install sddm-theme-breeze Resolving [=========================] Querying [=========================] Testing changes [=========================] Finished [=========================] Fatal error: The following packages have unmet dependencies: sddm-theme-breeze: Depends: plasma-workspace but it is not going to be installed
Neon Testing: Rolling back to an earlier snapshot and rerunning the update worked. Looks as if there was a 'Window of confusion' where the update was broken. Neon Developer: pkcon update Getting updates [=========================] Finished [=========================] Loading cache [=========================] Testing changes [=========================] Finished [ ] (0%) The following packages have to be removed: kinfocenter-4:5.18.5+p18.04+git20200505.1643-0.amd64 system information viewer neon-desktop-4+p18.04+git20200212.1956.amd64 KDE neon Plasma Desktop system plasma-desktop-4:5.18.5+p18.04+git20200509.0146-0.amd64 Tools and widgets for the desktop plasma-widgets-addons-4:5.18.5+p18.04+git20200509.0146-0.amd64 additional widgets for Plasma 5 plasma-workspace-4:5.18.5+p18.04+git20200508.0237-0.amd64 Plasma Workspace for KF5 plasma-workspace-wayland-4:5.18.5+p18.04+git20200508.0237-0.amd64 Plasma Workspace for KF5 - Wayland integration sddm-theme-breeze-4:5.18.5+p18.04+git20200508.0237-0.amd64 Breeze SDDM theme I now know that these warnings mean trouble...
Neon Developer now updated OK...
The problem is back again in Neon Testing... After the bad update, looks as if there are the same unmet dependencies: plasma-workspace: Depends: libksgrd9 but it is not going to be installed Depends: libksysguardsensorfaces1 but it is not going to be installed Depends: libprocesscore9 but it is not going to be installed Depends: libprocessui9 but it is not going to be installed
... and back workign with Neon Testing.
No longer an issue.