Michael, no, volume and brightness notifications are not supposed to appear simultaneously (<https://wiki.ubuntu.com/NotifyOSD#Animations%20and%20durations>, "Replaces any earlier confirmation bubble immediately"). Please report that as a separate bug.
Michael, no, volume and brightness notifications are not supposed to appear simultaneously (<https:/ /wiki.ubuntu. com/NotifyOSD# Animations% 20and%20duratio ns>, "Replaces any earlier confirmation bubble immediately"). Please report that as a separate bug.