Hi,

I experience a regression on my Macbook Air 2012 model with the 3.9-rc kernels (v3.9-rc2-284-gaea8b5d) The symptoms are that there is just no sound from the loudspeakers. The headphone output works fine.

I was able to pin point it down to one commit

1077a024 "ALSA: hda - Use generic parser for Cirrus codec"

If I revert this one and all came back to work. By comparing the alsa-info.txt output I figured that there is something wrong with the GPIO settings on node 0x01:

This is the excerpt with the previous patch mentioned reverted:

Codec: Cirrus Logic CS4206 Address: 0 AFG Function Id: 0x1 (unsol 0) Vendor Id: 0x10134206 Subsystem Id: 0x106b5600 Revision Id: 0x100302 No Modem Function Group found Default PCM: rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000 bits [0x1e]: 16 20 24 32 formats [0x3]: PCM FLOAT Default Amp-In caps: N/A Default Amp-Out caps: N/A State of AFG node 0x01: Power states: D0 D3 CLKSTOP EPSS Power: setting=D0, actual=D0 GPIO: io=4, o=0, i=0, unsolicited=0, wake=0 IO[0]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0 IO[1]: enable=1, dir=1, wake=0, sticky=0, data=0, unsol=0 IO[2]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0 IO[3]: enable=1, dir=1, wake=0, sticky=0, data=1, unsol=0

and here the output vanilla kernel:

Codec: Cirrus Logic CS4206 Address: 0 AFG Function Id: 0x1 (unsol 0) Vendor Id: 0x10134206 Subsystem Id: 0x106b5600 Revision Id: 0x100302 No Modem Function Group found Default PCM: rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000 bits [0x1e]: 16 20 24 32 formats [0x3]: PCM FLOAT Default Amp-In caps: N/A Default Amp-Out caps: N/A State of AFG node 0x01: Power states: D0 D3 CLKSTOP EPSS Power: setting=D0, actual=D0 GPIO: io=4, o=0, i=0, unsolicited=0, wake=0 IO[0]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0 IO[1]: enable=1, dir=1, wake=0, sticky=0, data=0, unsol=0 IO[2]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0 IO[3]: enable=1, dir=1, wake=0, sticky=0, data=0, unsol=0

The diff is "IO[3] data=1 vs data=0". I used then the patch function from the awesome hda-analyzer tool to patch this on the vanilla kernel and there suddenly I have output from the speakers.

I don't know if someone else has reported this already or if there is already a fix. I was without internet for few days and didn't report this in time. If that is the case, sorry for the noise.

The complete logs from hda-analyzer are here:

http://www.monom.org/misc/alsa/alsa-info.txt-v3.9-rc2-284-gaea8b5d http://www.monom.org/misc/alsa/alsa-info.txt-revert-1077a024

cheers, daniel