Cannot reproduce here. Has this problem persisted with newer versions of Darktable? Also, check to make sure you're not running on Wayland in 18.04.
** Changed in: darktable (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/1847864 Title: screen flashes while interaction in fullscreen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/darktable/+bug/1847864/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs