That icon appears to be 'software-update-available' according to our icon theme, so it might be either firmware related or related to the new store (https://github.com/ubuntu/app-center/issues). Not sure - I don't recall seeing it myself.
** Summary changed: - Mystery box on lock screen with a green arrow + Empty software update available notification on the lock screen ** Package changed: gdm3 (Ubuntu) => gnome-software (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/2039992 Title: Empty software update available notification on the lock screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/2039992/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
