This message is long overdue. I've commented on similar issues when other
people have mentioned similar items, but I am finally taking the time to
to ask this question.
Did anyone else have the sound from their internal speaker stop working
with the release of CentOS 7.2?
I have tested this with multiple machines with the same card and the same
issue.
The card is identified as:
!!PCI Soundcards installed in the system
!!--------------------------------------
00:1b.0 Audio device: Intel Corporation 82801JD/DO (ICH10 Family) HD Audio
Controller (rev 02)
!!Advanced information - PCI Vendor/Device/Subsystem ID's
!!-------------------------------------------------------
00:1b.0 0403: 8086:3a6e (rev 02)
Subsystem: 17aa:3048
At the release of CentOS 7.2, sound stopped working from the internal
speaker. I could still plug in headphones and get audio without issue, but
I can't use the speaker. This breaks between the last update kernel of
CentOS 7.1 and the GA kernel of 7.2 and is still broken as of the latest
7.3 kernel.
I have captured alsa-info.sh output from the following kernels:
kernel-3.10.0-229.20.1.el7.x86_64 <== Last kernel which produces sound
from internal speaker. If booted with this kernel, sound is produced from
the internal speaker. This was the last update kernel before CentOS 7.2
kernel-3.10.0-327.el7.x86_64 <== 7.2 GA kernel. Sound is not produced from
internal speaker.
kernel-3.10.0-514.26.2.el7.x86_64 Current 7.3 update kernel. Sound is not
produced from internal speaker.
I have tried eliminating alsa, as directed in Fedora sounds
troubleshooting
<https://fedoraproject.org/wiki/How_to_debug_sound_problems>
by removing alsa-plugins-pulseaudio
I have tried creating /etc/modprobe.d/sound.conf file with the
following contents:
=============================================================
options snd-pcsp index=-2
alias snd-card-0 snd-hda-intel
alias sound-slot-0 snd-hda-intel
options snd-hda-intel model=6stack
options snd-hda-intel position_fix=1 enable=yes
=============================================================
I have tried listing and unmuting all devices alsa using scripts from
<http://www.troubleshooters.com/linux/sound/sound_troubleshooting.htm>
The only thing which appears relevant that is mentioned in the RHEL 7.2
release notes is:
"The HDA driver has been updated to the latest upstream version to use
the new jack kctls method."
In reviewing the changelog there are a handful of sound/alsa related
changes in 3.10.0-318.el7 and prior to that, there were an immense number
of sound/alsa changes in 3.10.0-278.el7.
The most specific thing that I can state is that in the working kernel, in
alsamixer there is a second box which appears to be a level which can be
adjusted on top of the item "Front" which I assume to be the front
speaker. In the kernels that do not have sound working, this second
level-looking box does not appear.
I welcome any and all suggestions.
Thanks,
Barry
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