(In reply to Frédéric Pierret from comment #5)
> Hi,
>
> I also had the same problem with my ASROCK X370 Gaming K4 (ALC1220):
>
> 1st case: Booting FIRST Linux: Sound with noise/crackling.
> 2nd case: Booting FIRST Windows and SECOND Linux: Sound is perfect.
>
> I suceed in solving the problem by comparing the Coeff values in both cases
> and assign the values of the second case in a script at boot time. How to:
>
> - Install alsa-tools.
> - In both cases, you have to: echo 1 >
> /sys/module/snd_hda_codec/parameters/dump_coefs
> - Then, in the first case, alsa-info --no-upload --output infos_bad
> - Then, in the second case, alsa-info --no-upload --output infos_good
> - Finally, you compare the coef values: diff infos_bad infos_good | grep
> Coeff
>
> For changing the value of each different Coeff, you need to proceed as
> follow: for example, changing Coeff 0x67 to value 0x3000
>
> hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x67
> hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x3000
>
> You have to do this in the growing order of Coeff. Remark that hwC0D0 refers
> to your sound card. In case of HDMI output like me, my sound card if hwC1D0.
>
> Here is a quick script:
>
>
> #!/bin/bash
>
> coeffs=($(echo 0x{16,43,44,5d,5e,63,67}))
> values=($(echo 0x{8020,3405,fa10,0606,,e430,3000}))
>
> for i in `seq 0 $(( ${#coeffs[@]} - 1 ))`
> do
> hda-verb /dev/snd/hwC1D0 0x20 SET_COEF_INDEX ${coeffs[$i]} && hda-verb
> /dev/snd/hwC1D0 0x20 SET_PROC_COEF ${values[$i]}
> done
>
>
> Just change the coeffs to change in the array 'coeffs' and the new values in
> array 'values' and exec this script. A remark, while I do not shutdown the
> power supply, my audio chipset keeps the values. This is why you need to do
> the FIRST case (first...) and then the second. Then, you could test if it
> works only when you shutdown the power supply of your mobo and then booting
> into Linux directly.
>
> I'm preparing a patch for the kernel but for those who have the problem,
> could you post your coeff/values which need to be change please.
>
> Hope this helps.
Hi Frederic,
thank you for sharing your approach and script.
It helped me to solve a problem with my ALC3234 (Dell Optiplex 3040 Micro). The
analog output format was limited to 44.1kHz/48kHz after direct linux boot. With
a previous Windows boot, additional 96kHz/192kHz are available.
I will attach the adapted script, that works for me. May be it helps someone.
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/1801540
Title:
Microphone distorted sound on ALC892/1220 on AMD chipsets
Status in Linux:
Confirmed
Status in linux package in Ubuntu:
Won't Fix
Status in pulseaudio package in Ubuntu:
Won't Fix
Bug description:
Not sure if I'll report this upstream but there is definitely an issue
with microphone recording on my desktop, this is not happening on my
laptop which has a different codec.
Already tried all workarounds possible, no luck. Only with my desktop
with this particular motherboard. No issues in Windows, the sound
recorded in there is distorted and has some static and robotic tone on
high-pitch.
alsa-info on the attachments
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