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I installed Ubuntu 13.10 on a new MacBook Pro (Late 2013, 13-inch
Haswell retina). The speakers did not work after installation, and
after I fixed it, it would not work after suspend. It turns out some of
the flags were not set correctly. I can fix these problems but it would
be nice to have them fixed at installation.
The problem can be seen in the GPIO section in
/proc/asound/card1/codec#0 (card0 is for HDMI). After boot, the GPIO
flags for IO[0] were
GPIO: io=6, o=2, i=0, unsolicited=1, wake=1
IO[0]: enable=1, dir=1, wake=0, sticky=0, data=0, unsol=0
If data were set to 1, sound would work! I fixed this by installing
alsa-tools and adding to /etc/rc.local a line:
hda-verb /dev/snd/hwC1D0 0x1 set_gpio_data 1
After resuming from suspend, the GPIO flags for IO[0] became
GPIO: io=6, o=2, i=0, unsolicited=1, wake=1
IO[0]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
Here, three flags were set to 0. I fixed this by adding to
/etc/pm/sleep.d/99_myfix a few lines:
#!/bin/sh
case "$1" in
resume|thaw)
hda-verb /dev/snd/hwC1D0 0x1 set_gpio_mask 1
sleep 1
hda-verb /dev/snd/hwC1D0 0x1 set_gpio_direction 1
sleep 1
hda-verb /dev/snd/hwC1D0 0x1 set_gpio_data 1
;;
esac
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment
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MacBookPro11,1 (Late 2013 Haswell) has no sound
https://bugs.launchpad.net/bugs/1255370
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