I decided to try the latest alsa-drivers available on the official homepage (1.0.13) released in september and it fixed my issue.
My chipset is now recognized as a Conexant chip [EMAIL PROTECTED]:/# head -5 /proc/asound/card0/codec* Codec: Conexant ID 5047 Address: 0 Vendor Id: 0x14f15047 Subsystem Id: 0x1179ff31 Revision Id: 0x100000 -- Low volume & distorted sound on HPdv8235ea laptop https://launchpad.net/bugs/47755 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs