I have the same happening on Acer Aspire One netbook, desktop effects are switched off.
When I step the volume up to the maximum (ie. the volume icon is about to turn "bright") it uses a lot of CPU (50% according to top) for that half second and there's a delay before it is displayed. notify-osd 0.9.11-0ubuntu3 desktop effects: None Integrated Graphics Chipset: Intel(R) 945GME xserver-xorg-video-intel 2:2.6.3-0ubuntu9 metacity 1:2.25.144-0ubuntu2 -- brightness and volume notifications updating is slow https://bugs.launchpad.net/bugs/337861 You received this bug notification because you are a member of Notify OSD Developers, which is subscribed to Notify OSD. Status in Notify OSD: Incomplete Bug description: This problem came with the latest updates, it takes a second for the progress bar to move after the change has been made. This worked fine before. _______________________________________________ Mailing list: https://launchpad.net/~dx-team Post to : [email protected] Unsubscribe : https://launchpad.net/~dx-team More help : https://help.launchpad.net/ListHelp

