looking a bit more, indeed the gnome-shell behaviour changed as described in https://gitlab.gnome.org/GNOME/gnome- shell/merge_requests/208/
They changed it to have to maintain the modifier and cycle through the configs by pressing the letter then, which doesn't work when you have a key 'faking the event' (which is what the upstream bug is about). To support that usecase again they changed back in 3.30, which means it should work in 18.10. Could you try there if the issue is indeed resolved for you? If so we should backport https://gitlab.gnome.org/GNOME/gnome-shell/commit/fcdac69e to bionic -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1772811 Title: different behaviors for switch display mode between xenial and bionic Status in OEM Priority Project: Confirmed Status in gnome-settings-daemon package in Ubuntu: Incomplete Bug description: When the "Fn lock" is enabled, we can switch the video mode by one key: video-key (Fn+F8). But, the key event is too frequent. It's hard to select the wanted video mode. Reproduce steps: Press down the Video-out hotkey Expected results: User can select Video mode precisely by Video-out hotkey Actual results: The speed of switch video mode is too fast makes can not select Video mode precisely Notebook: XPS 13 To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1772811/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

