OK, I am back home and can test a bit more. Unfortunately my other headsets are all 2.5mm and do not fit into the SONY Vaio Pro's 3.5mm jack. Nevertheless, I am pretty confident that the headset I tested with is fully functional because it works with both the SONY Vaio Pro (when booted to Windows) and with my cellphone. Maybe something is misconfigured on my end, which I could find out with a live USB key. I am waiting for the SRU (Stable Release Update?). I have tried removing the oem-audio-hda-daily-dkms_0.1_all.deb package from my system today but it resulted in no microphone at all and I reinstalled it.
OK, I am back home and can test a bit more. Unfortunately my other headsets are all 2.5mm and do not fit into the SONY Vaio Pro's 3.5mm jack. Nevertheless, I am pretty confident that the headset I tested with is fully functional because it works with both the SONY Vaio Pro (when booted to Windows) and with my cellphone. Maybe something is misconfigured on my end, which I could find out with a live USB key. I am waiting for the SRU (Stable Release Update?). I have tried removing the oem-audio- hda-daily- dkms_0. 1_all.deb package from my system today but it resulted in no microphone at all and I reinstalled it.
I would like to know more details about the headset that worked for Toufik (comment #28). Mine is an old Nokia headset. Raymond sent me a few weeks back to this link that explains it well: <https:/ /en.wikipedia. org/wiki/ Phone_connector _%28audio% 29#TRRS_ Standards>