La solución en mi caso fue desinstalar los controladores de video fglrx AMD / ATI patentados de la siguiente manera:
sudo apt-get remove fglrx fglrx-amdcccle-updates sudo apt-get remove xserver-xorg-video-ati:amd64 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874926 Title: Error upgrade to 20.04 from 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1874926/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
