Comment 38 for bug 218817

I can confirm this also happens in my Semp Toshiba Informatica IS1253 notebook. Same Conexant CX20549 (Venice) codec. When inserting the headphone in the jack, speakers are muted, but so is the headphone sound and, yes, you can notice the sound coming from the phones for a fraction of a second. OK, more advanced users can easily fix that inserting the micsense options on alsa-base.conf but such a "small" bug makes many many newbies simply give up on Linux.