A bit more naive debugging revealed that indeed we need to look at all descendants, not just direct children:
[2016-08-25:11:24:30.175] qtmir.dbus: DBusFocusInfo: pid 13344 is in cgroup "/" which is not app-specific [2016-08-25:11:24:30.175] qtmir.dbus: DBusFocusInfo: looking at session[0x1006130,name="unity8-dash",pid=12709] [2016-08-25:11:24:30.177] qtmir.dbus: DBusFocusInfo: looking at child session[0x8f4500,name="payui.qml",pid=13293] [2016-08-25:11:24:30.178] qtmir.dbus: DBusFocusInfo: looking at grandchild session[0xe138c8,name="online-accounts-ui",pid=13344] [2016-08-25:11:24:30.178] qtmir.dbus: DBusFocusInfo.isPidFocused(13344) pidSet=QSet(13344) found session[0xe138c8,name="online-accounts-ui",pid=13344] with activeFocus=true -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1612166 Title: can't log in to U1 while buying app To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1612166/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
