that's not an ubuntu bug then, downgrades from ppa can't be supported in the distribution
** Changed in: gnome-session (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-session in Ubuntu. https://bugs.launchpad.net/bugs/779888 Title: package gnome-session 2.32.1-0ubuntu20 failed to install/upgrade: tentata sovrascrittura di "/usr/share/gnome- session/sessions/ubuntu.session" presente anche nel pacchetto gnome- session-common 2.32.1-0ubuntu20 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/779888/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs