@mmifas, Thank you for your testing result, and It looks like the headphone (0x21) can't detect the plug/unplug. I have no idea why this happened.
I already asked for help from Realtek technical expert, he suggested we turn on the hidden register (0x20), then generate an alsa-info.txt. To do so, please follow the steps as below: 1. sudo echo 1 > /sys/modules/snd_hda_codec/parameters/dump_coef 2. generate a new alsa-info.txt and upload it to launchpad. (refer to #14). Thanks. -- 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/1447909 Title: external mic not detected on machines with alc256 codec Status in HWE Next: Fix Released Status in linux package in Ubuntu: Fix Released Bug description: This bug is used for tracking, please do not triage. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1447909/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
