Hi Takashi, The v3.8-rc kernels have regressed from v3.7 with the quad-speaker arrangement on my Macbook Pro 10,1 - only the higher-frequency speakers work despite the front and rear channels being exposed in the mixer.
Reverting f37bc7 [1] restored the correct behaviour ([2] was reverted to compile, but the problem still occurs with only [2] reverted). How can I help to debug this and find the right approach? Thanks, Daniel --- [1] commit f37bc7a88d374448a1f4bba9267d308606d78bf2 Author: Takashi Iwai <ti...@suse.de> Date: Thu Nov 8 15:59:23 2012 +0100 ALSA: hda - Give standard "Bass Speaker" mixer for 2.1 speakers When two built-in speakers are found on the machine, we can suppose it's rather a 2.1 speaker system with a bass output instead of front/surround channels. Signed-off-by: Takashi Iwai <ti...@suse.de> --- [2] commit ee81abb623cb5e03c182d16871bb4fb34fdc9b4f Author: Takashi Iwai <ti...@suse.de> Date: Thu Nov 8 17:12:10 2012 +0100 ALSA: hda - Apply a proper chmap for built-in 2.1 speakers When 2.1 speakers are detected, use the corresponding channel map instead of the standard map with front+rear surrounds. Signed-off-by: Takashi Iwai <ti...@suse.de> -- Daniel J Blueman -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/