Documentation/sound/alsa/VIA82xx-mixer.txt

   1
   2                                 VIA82xx mixer
   3                                 =============
   4
   5 On many VIA82xx boards, the 'Input Source Select' mixer control does not work.
   6 Setting it to 'Input2' on such boards will cause recording to hang, or fail
   7 with EIO (input/output error) via OSS emulation.  This control should be left
   8 at 'Input1' for such cards.