Although it's the 27th already, we have no news about Mandriva S.A. yet.
Since some users might be using Mandriva 2010.2 for a while longer, I want to post a fix for a problem that returns periodically: the lack of audio in Mandriva 2010.2 due to the system's failure to identify the sound output. When that happens, the computer goes silent and the speaker icon in the lower panel reads "dummy output".
To fix it, open MCC and, after typing your root password, look for "system". Once there, click on "manage users" and select your name from the list. Click on "edit" and, on the new window, find the tab "groups". Check "audio" and "accept". That should take care of the problem :-)