I encountered the following problem after finally getting sound to work on my LG LS70 Express laptop with openSUSE 11 (fresh installation).
The multimedia buttons vol+ and vol- work as expected, while the mute button has no effect on the sound output. I do see a popup on the screen and a “muted speaker” icon, but the sound keeps playing.
However, if I plug in my headphones and press mute - the headphones are muted.
I came here after a long struggle with the system, the solution was found on the Intel sound card troubleshooting guide. (originally there was no sound from the built-in speakers, only through the headphones output).
I do NOT want to address the problem in this thread, as it is possible desktop related, and I have no experience in that respect.
I saw your other post first (before this one) and I wish you had kept that in this thread, as opposed to tagging on to someone else’s (where your hardware is completely different). … anyway … I can NOT help in this thread.