Hi,
I have a Dell Latitude 7480 and a stranger than usual audio popping/clicking/crackling issue. I run Fedora 29, fully updated. The thing is when I boot the laptop, the audio clicks at certain low sound volumes or events. For example when testing the speakers in the Gnome sound settings panel causes multiple clicks/pops. Listening to a audio/video file with certain silent parts causes pops/clicks.
I have tried (almost) everything. Changing Pulseaudio setting does not work. Running a pure Jack system does not work. So the issue is not with Pulseaudio or Jack. I have tried disabling Intel HDA powersaving, that also does not work.
But all problems disappear when I suspend and then resume the laptop. After resuming, everything works great. So at boot there are sound issues, but after a suspend/resume cycle everything is fine!
See https://bugzilla.redhat.com/show_bug.cgi?id=1525104#c108 for more details and testing. I have also attached alsa-info.sh.
Kadir