This describes my problem too (since some time). Cut and past don't work in PCManFM 1.2.5, but works on the very same file in the default file manager Filer 3.26.4. That should rule out other stuff I think.
lsb_release -rd Description: Ubuntu 18.04.3 LTS Release: 18.04 Same result in standard "Ubuntu" session as in "GNOME Flashback (Metacity)" (gnome-session-flashback). /Per -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799081 Title: Unable to cut+paste using PCManFM in Ubuntu 18.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pcmanfm/+bug/1799081/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs