It's a shot in the dark, but in my case, pulse sound server (atop of alsa) seems to have gotten into a mess with an upgrade between 16.04 and 18.04. Post login, removing old / session start user config fixed my dodgy channel mappings (but not quite the same as crackling, etc):
pulseaudio --kill \ && rm -r ~/.config/pulse/* \ && pulseaudio --start However, every new boot, the same missing channel mappings cause my audio to sound bad (not mapped correctly to 5.1 channels). Also, try alsa-info which is a script that bundles all the alsa inspection commands and then maybe try fish for the problem in that. Also try figure out how to play a sound file directly to alsa vs via the pulse sound server to rule out pulse causing the problem. I think the speaker-test command also directly tests the alsa layer where as the gnome-control-centre (settings) sound page "Test Speakers" tests the setup via pulse. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1790816 Title: Terrible sound after update to 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1790816/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
