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Bug 663510

Summary: ASUS ROG G751 - ALC668 soundcard detects microphone, but no output.
Product: Gentoo Linux Reporter: hovardslill <hovardslill>
Component: Current packagesAssignee: Gentoo Linux bug wranglers <bug-wranglers>
Status: RESOLVED INVALID    
Severity: normal CC: jstein
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
Whiteboard:
Package list:
Runtime testing required: ---

Description hovardslill@gmail.com 2018-08-13 12:00:34 UTC
Hi!
I recently bought a sennheiser g4me one, and can't get the microphone working.
It has two male connectors, one for sound and another for microphone.
Sound works well, and mic gets detected by ALSA and Pulseaudio, but only noise comes from the mic. Even using the mute
method on the headset doesn't stop or interrupt the noise in any way.

Some things to note that may be related:
Plugging in the headset causes built in laptop microphone to stop working, works after plugging headset out again.
The right part of the microphone produces slightly more noise than the left in pavucontrol.

Things I've tried:
Windows - Works perfectly fine
All profiles in pavucontrol
Unmuting everything and setting it to 100% in alsamixer
Ubuntu 18.04.1 LiveCD - same problem
Using 'hdajackretask' and testing every pin on microphone
Editing /etc/modprobe.d/alsa.conf:
        option snd-hda-intel model=laptop
        option snd-hda-intel model=asus-mode[1-8] - Makes the noise louder
        option snd-hda-intel model=auto
        option snd-hda-intel position_fix=1 enable=yes

My laptop is an ASUS ROG G751JT
I run gentoo with profile 17.1
Uname -a: "Linux haavardheim 4.17.12-gentoo #1 SMP Wed Aug 8 15:13:32 CEST 2018 x86_64 Intel(R) Core(TM) i7-4720HQ CPU
@ 2.60GHz GenuineIntel GNU/Linux"
Soundcard (alsamixer): "HDA Intel PCH"
Chip (alsamixer): "Realtek ALC668"
pacmd list-sources (mic plugged in): https://paste.pound-python.org/show/lXOYnKHHKUO8kNbjtc7W/
pacmd list-sources (mic unplugged): https://paste.pound-python.org/show/sMiHT0TY1ClOXyqslH1v/
Kernel configs: https://paste.pound-python.org/show/a7cV5UHTVCLZ2bXIq0y7/
emerge --info: https://paste.pound-python.org/show/H5Os1rBxvBxkYr6ZaBEN/
alsa-info.sh: http://www.alsa-project.org/db/?f=cda6de2c984120c573f8b1b4d90c65737146103d

Thank you in advance :)
-HÃ¥vard
Comment 1 Jonas Stein gentoo-dev 2018-08-18 14:46:44 UTC
It is sad to read that you have problems with the soundcard. The situation seems to be a bit more complicate and requires some analysis.
We can not help you efficiently via bug tracker. The bug tracker aims rather on specific problems in .ebuilds and less on individual systems. 

I have had very good experience on the gentoo IRC [1] with questions like this. Of course there are also forums and mailing lists [2,3].
I hope you understand, that I will close the bug here therefore and wish you good luck on one of the mentioned channels [4].
Please reopen the ticket in order to provide an indication for an specific error in an ebuild or any gentoo related product.

[1] https://www.gentoo.org/get-involved/irc-channels/
[2] https://forums.gentoo.org/
[3] https://www.gentoo.org/get-involved/mailing-lists/all-lists.html
[4] https://www.gentoo.org/support/