...until you press either up or down, and then it immediately jumps back to the standard nominal level. Very strange, and gave us all quite a fright! I ran alsamixer and the master volume would be on say 60. Play media, it immediately goes to 100. Press either up or down, and it will then immediately jump back to 62 or 58 or whatever.
I tried re-running the AV wizard, which was interesting because that started off on maximum volume as well... until I changed the level, and again it jumped back down to a much lower volume. It didn't fix the problem.
Haven't tried anything else. Has anybody else seen this?