MacBookPro11,1 | Ubuntu 15.04 | issue with red light in jack

Bug #1464231 reported by Jindřich Káňa
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This bug affects 1 person
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Ubuntu Desktop Course
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Bug Description

Hi All,

I am facing issue with Ubuntu 15.04 running on MacBookPro11,1 with red light coming from jack port.

I tried to use amixer or alsamixer to switch off (mute) IEC958 as a workaround without luck.

00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 09)
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)

I have also tried to find the way to do it via pulseaudio but haven't found reasonable answer.

Light is starting to shine somewhere in the middle of the boot process.

Not sure what output is exactly needed so in case that something is missing, just tell me please.

Thanks much!
J.

description: updated
Revision history for this message
Jindřich Káňa (jindrich-kana) wrote :

I have tried to play a bit with modules and this is a result.

root@ubu:~# head -15 /etc/modprobe.d/blacklist.conf
# This file lists those modules which we don't want to be loaded by
# alias expansion, usually so some other driver will be loaded for the
# device instead.

blacklist snd_hda_codec_cirrus
blacklist snd_hda_codec_generic
#blacklist snd_hda_intel
blacklist snd_hda_controller
blacklist snd_hda_codec
blacklist snd_hwdep
#blacklist snd_pcm
blacklist snd_timer
blacklist snd
blacklist soundcore

root@ubu:~# lsmod |grep -Ei "snd|sound"
snd_hda_intel 32768 0
snd_hda_controller 32768 1 snd_hda_intel
snd_hda_codec 143360 2 snd_hda_intel,snd_hda_controller
snd_hwdep 20480 1 snd_hda_codec
snd_pcm 106496 3 snd_hda_codec,snd_hda_intel,snd_hda_controller
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 32768 1 snd_seq_midi
snd_seq 69632 2 snd_seq_midi_event,snd_seq_midi
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 32768 2 snd_pcm,snd_seq
snd 90112 8 snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device
soundcore 16384 2 snd,snd_hda_codec

so it seams that generic is causing red light but without that module sound doesn't work and there is only dummy output.

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