This is an KDE issue, but I found it on PCLOS 2010 Beta2. I'm sorry if I open this in the wrong section.
I have a Sony Vaio FS315E laptop with the following problem:
KDE does not remember microphone setting, so it works when set up the first time. After a reboot or shutdown, it is necessary to switch to "Front Mic" and back to "Mic" using the Kmix to make it work.
I attach the lspci output. Please let me know if anything else can be useful.
Thanks anyone for help.