The sound indicator in the Gnome Shell panel sometimes disappears, I didn't notice any action from my side that may have triggered it. When I open the sound settings manually, I can't adjust anything either, however, the sound in general still works fine. Restarting X brings things back to normal.
Any idea how I can regain control over the sound settings short of restarting the entire system? I'm running 11.10 with Gnome-Shell 3.2.
Somebody asked the same question a couple of days ago, which was closed for being "too localized". I'm obviously not the only one affected so I can only guess that Gnome-Shell is too niche here. If so, please just close this one as well.
UPDATE: I just found that all details of my problem match the bug described in this question. Can somebody please mark my question a duplicate? Thanks a lot.