Ok newbie error here. The solution was just updating the opengl drivers which apparently went missing.
** Changed in: calibre (Ubuntu) Status: New => Invalid ** Converted to question: https://answers.launchpad.net/ubuntu/+source/calibre/+question/691611 -- You received this bug notification because you are a member of Edubuntu Bugsquad, which is subscribed to calibre in Ubuntu. https://bugs.launchpad.net/bugs/1885348 Title: Calibre eBook Viewer doesn't open in Ubuntu 20.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1885348/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~edubuntu-bugs Post to : edubuntu-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~edubuntu-bugs More help : https://help.launchpad.net/ListHelp