• Takashi Iwai's avatar
    ALSA: hda - Fix silent speaker output on Acer Aspire 6935 · 02a237b2
    Takashi Iwai authored
    Since 3.2 kernel, the driver starts trying to assign the multi-io DACs
    before the speaker, thus it assigns DAC2/3 for multi-io and DAC4 for
    the speaker for a standard laptop setup like a HP, a speaker, a mic-in
    and a line-in.  However, on Acer Aspire 6935, it seems that the
    speaker pin 0x14 must be connected with either DAC1 or 2; otherwise it
    results in silence by some reason, although the codec itself allows
    the routing to DAC3/4.
    
    As a workaround, the connection list of each pin is reduced to be
    mapped to either only DAC1/2 or DAC3/4, so that the compatible
    assignment as in kernel 3.1 is achieved.
    
    Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=42740
    
    Cc: <stable@kernel.org> [v3.2+]
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    02a237b2
patch_realtek.c 157 KB