I think the poster here  and here  are the same person. That person mentions in the Lenovo thread  that the "sudo hda-verb /dev/snd/hwC0D0 0x1d SET_PIN_WIDGET_CONTROL 0x0" command is temporary, and to permanently apply it the method mentioned in the same Lenovo thread needs to be done.
Knowing that either of those methods appear to be the fix, what is necessary to resolve this permanently and not require the method mentioned here ? Additionally, for my own curiosity, what exactly is happening when applying either of the fixes? Thanks.  https://www.reddit.com/r/thinkpad/comments/8j8208/audio_crackling_through_both_headphone_jack_and/  https://forums.lenovo.com/t5/Linux-Discussion/X1-Carbon-Gen-6-weird- audio-behaviour/m-p/4172468/highlight/true#M11520 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1805079 Title: click/pop noise in the headphone on several lenovo laptops Status in linux package in Ubuntu: Fix Committed Bug description: [Impact] Lenovo told us that some linux uers reported headphone noise on Lenovo's website. After investigating, we found those Lenovo laptop mdoels all have the codec of alc285, and we can reproduce the noise problem too. [Fix] Don't use the DAC of headphone, let headphone share the DAC with speaker, the noise disappears. [Test Case] After applying this patch, we tested on Lenovo P52, P72, X1 carbon and X1 Yoda2, no noise anymore [Regression Potential] Low. This patch only apply to several lenovo machines, and after applying this patch, both speaker and headphone still work very well. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1805079/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp