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  1. Bug #1821663
  2. Comment #9

Comment 9 for bug 1821663

Revision history for this message
Hui Wang (hui.wang) wrote : Re: [snd_hda_codec_realtek] repeating crackling noise after 19.04 upgrade

Do you mean that you installed the deb of #7 in the kernel-rc3, there is no noise, while installed the deb of #7 in the kernel-rc4, still has noise? So looks like it is not the alsa hda driver's issue, since the deb contains the driver exact same as the rc3.

Please help collect two alsa-info.txt:

1) using rc4 kernel, plug headphone, when there is noise, please enable dump_coef and run alsa-info
$sudo
root@hwang4-Vostro-5390:/# echo 1 > /sys/module/snd_hda_codec/parameters/dump_coef
root@hwang4-Vostro-5390:/# alsa-info
Then upload the /tmp/alsa-info.txt.xxx to launchpad.

2) using rc3 kernel, plug headphone, there is no noise, please also enable dump_coef and run alsa-info, then upload the new /tmp/alsa-info.txt.yyyy to launchpad.

Let us see if there is any difference in the two alsa-info.txt.

thx