Comment 23 for bug 1805079

The two methods appear to do the same, except hda-verb applies the change when run and the other method at the time the hda kernel module is loaded. You can run hda-verb at boot instead, but the other method looks cleaner to me, as it applies the fix when the hardware is configured by the driver. I believe this fix can also be added to the driver itself.

As I described above[0], after Hui Wang fixed this bug here that we're commenting on[1], I started to hear noise in headphones. This is not occasional crackling sound, this is constant annoying noise. Not every gen6 Carbon has this issue, apparently. This fixes the issue.

[0] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1805079/comments/8

[1] https://lkml.org/lkml/2018/12/4/520