Compare the output you get when starting calibre in the terminal with the output in this bug: https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1898904
If it is the same, please mark your bug a duplicate of that one (and see discussion in that bug for ways to workaround issue). Thanks ** Changed in: calibre (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1900271 Title: Calibre does not start in Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1900271/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs