Hi Kai-Heng Feng, Takashi, I see that you are on the notification list for this bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1850439 So you may have already seen this. Some owners of affected laptops (which have non working speakers / headphone output atm), have done some heroic debugging work and come up with a set of 2 hda-verb commands which fix this. I'm not all that familiar with writing hda quirks, so I was hoping that one of you 2 can come up with a patch to fix this at the kernel level. This would also resolve these 2 bugs, which I believe are the same bug really: https://bugzilla.kernel.org/show_bug.cgi?id=206289 https://bugzilla.redhat.com/show_bug.cgi?id=1834751 Regards, Hans
