(In reply to Fabian Vogt from comment #8) > mysql.err clearly shows that the database got corrupted, there's > unfortunately not much you can do at that point. Turning on recovery mode > and trying to pull as much data is the best option, but might not result in > a usable clone. I agree that the error messages during akonadi initiated/controlled start point to corrupted data. However, the akonadi database was available via mysql -h localhost -u root -p I can not explain how comes that after mysql -h localhost -u root -p , sql queries worked .... not only sql queries but also mysql-check did not point to any issues with table belonging to akonadi database . Is akonadi ceating/using a proprietary database different from the akonadi database accessed via mysql -h localhost -u root -p ? It is very strange complains that the connection fails while other user/utility has problems. Could you please tell me if we can customize kmail to access akonadi database directly without database services provided via "akonadi" packages ? Thanks, ND