Are you sure ubuntu-app-launch doesn't/shouldn't play a role in providing some kind of session/settings for GTK apps to get?
I know theoretically this could be fixed in GTK, UAL or Unity8. Just don't know where is the correct place. ** Also affects: unity8 (Ubuntu) Importance: Undecided Status: New ** Changed in: unity8 (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1672693 Title: GTK theme in apps appears different under Unity8 compared to Unity7 Status in Canonical System Image: Confirmed Status in gtk+3.0 package in Ubuntu: Confirmed Status in unity8 package in Ubuntu: Confirmed Bug description: Ubuntu 17.05 Unity8 some submenus in GTK3 apps look like widgets (see attached screenshots) run whatever gtk3 apps native (without Xmir), sol or eog open the menu/submenus. the first time you open the menu everything is fine but the next times it shows this widget like submenus. just open and close submenus (hover the mouse over the main menu left right, right left) To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1672693/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp