"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?" ===>>>> yes
Attached you can find the two alsa file. I've compared the two files and I sow a difference in power_save setting: this PC is not able to suspend and resume. I saw many ACPI error while the system is booting. A- ** Attachment added: "alsa rc3" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1821663/+attachment/5251920/+files/alsa-info.txt.iuZ4V0RGwP.rc3 -- 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
