The other day not only did I lose sound but I alsa could not reconfigre the sound via kcontrol as the left hand side menu was empty. Despite following the instructions given on this site to regain the icons in kcontrol - delete .config - I was forced to delete the whole kde directory in the home folder. That got the icons back but the sound was still borked.
What is so confusing for pclinuxos is that there are two sound devices. And kde picks the wrong device as the default sound device. And despite doing a alsaconf as root and the situation righting itself it is not permanent.
I am writing this via epithany in debian. debian also had a problem with the devices but there was a permanent fix and that was to add the two sound devices to alsa-base in the order you wanted them. Tried the same in pclinuxos but it just confused poor old pclinuxos - there was no sound at all not even in alsa-mixer.
So what is up with the sound?