For the quiet and non-quiet ｐｒｏｂｌｅｍ, since there is no difference between 1st and 2nd alsa-info.txt, I really have no idea what is the root cause for this problem. Probably, we can do another test: don't plug the headphone in poweroff state, poweron the machine, and let machine enter grub, then plug the headphone, after that, let machine boot linux kernel..., let us see if the headphone is still quiet or not, if not, it looks like bios do sth if plugging headphone in poweroff state.
For the noise problem, since I did not hear the noise in my test two weeks ago, and I don't have machine in my hand now, I need to wait for ending of holiday (after new year holiday), then I will get the machines and redo the test. thanks. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1805079 Title: click/pop noise in the headphone on several lenovo laptops To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1805079/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
