Mandriva 2006 work otherwise flawless including very good Bluetooth support.
Nut the new S7020 have a software closing module to stop the sound from the loudspeakers when plugging your headset into the laptop. The problem is that this doesnt work in Linux.
I have seen this problem with Realtek ACL880 cards, which use the HDAudio Chipset. I got an updated alsa driver from Realtek for my card. This is a common problem, and you can likely find a fix by searching your distro's forums or bugtracker.