Created attachment 108075 [details] Message of Akonadi in KOrganizer (German) Plasma 5.10.5, Kernel 4.12.14, KOrganizer 5.6.1. When starting KOrganizer it is demanded to start Akonadi manually (by clicking on a Start-Button) because Akonadi doesn't run (status: stopped). After clicking on 'Start' there is an error: Akonadi Service for PIM doesn't work properly. Clicking on 'Details' button has no effect. Finally Akonadi seems not to run and KOrganizer doesn't work. No access to KOrganizer gui. I deleted /home/user/.local/share/akonadi and then started akonadi with: akonadictl start. The status still shows: stopped. In Plasma 5.9 KOrganizer was working properly....
Created attachment 108078 [details] akonadi-selftest messages
It seems, that there was a bug in qtsql, which was patched here: https://github.com/gentoo/gentoo/commit/fcd29d4494974a776c442fafed0e1782d60a824d#diff-f1c48493878b52fb96fdcb2967672d97 Now, my KOrganizer is working properly again.