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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1821663 Title: [snd_hda_codec_realtek] repeating crackling noise after 19.04 upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1821663/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
