sound fails suddenly
The sound suddenly failed. It had been working for a long time. It worked in the afternoon. In the evening it didn't work anymore. No changes have been performed on the system in between.
I am not sure if it's connected, but the computer is slightly slower at bootup, something about getting IDE disks info. Maybe there is a hardware failure, although the computer is not that old.
I am not sure how to go about debugging this.