ESS Allegro (marked ES1989S), [125d:1988] (rev 10) is mute after loading snd-maestro3 and running alsactl restore. Touching master volume or mute makes it work.
Looks like a bug in the AC'97 codec integrated into the chip. Write AC97_MASTER register twice to work-around the problem. Signed-off-by: Ondrej Zary <[email protected]> --- sound/pci/maestro3.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c index 965d5c6..17ae926 100644 --- a/sound/pci/maestro3.c +++ b/sound/pci/maestro3.c @@ -1929,6 +1929,16 @@ snd_m3_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) return; snd_m3_outw(chip, val, CODEC_DATA); snd_m3_outb(chip, reg & 0x7f, CODEC_COMMAND); + /* + * Workaround for buggy ES1988 integrated AC'97 codec. It remains silent + * until the MASTER volume or mute is touched (alsactl restore does not + * work). + */ + if (ac97->id == 0x45838308 && reg == AC97_MASTER) { + snd_m3_ac97_wait(chip); + snd_m3_outw(chip, val, CODEC_DATA); + snd_m3_outb(chip, reg & 0x7f, CODEC_COMMAND); + } } -- Ondrej Zary -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
