I can change the setting when plug micphone before start 'gnome-control-center sound-nua'. And also I can change it from pavucontrol.
The sound-nua couldn't call the update function to update input_bar. ** Changed in: gnome-control-center (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1291862 Title: [soundnua]mic volume adjust bar is gray if you open sound-nua input tab earlier than plugging micphone Status in “gnome-control-center” package in Ubuntu: New Bug description: gnome-control-center 1:3.4.2-0ubuntu0.13.1 in precise updates. In laptop you can't reproduce this issue, cause there have 'Internal Microphone' already. I find this issue im my PC, there are two jacks in front panel, input and output. 1. Install system and log in to Desktop 2. Connect the headphone in front panel 3. Open sound settings menu and click Input tab I made an screenshot for it. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1291862/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp