tried gnome-control-center 1:3.28.2-0ubuntu0.18.04.6 in a LG Thin Client[0], can fix this issue
[0] https://www.lg.com/global/business/monitor/monitor-products/lg- CK500W -- 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/1853584 Title: [SRU]Not able to adjust Audio input UI volume after connecting headset Status in gnome-control-center: New Status in OEM Priority Project: Triaged Status in OEM Priority Project bionic series: Triaged Status in gnome-control-center package in Ubuntu: Fix Released Status in gnome-control-center source package in Bionic: Fix Committed Bug description: [ Impact ] Not able to adjust Audio input UI volume if this device doesn't have a internal mic, the volume bar will be gray. [ Test Case ] 1. Boot ubuntu without any external headset connected. 2. Launch gnome-control-center and switch to Sound->Input tab. 3. Connect external headset, then you will find the input show up but can not adjust the volume. [ Regression potential ] Low. change is the workaround to active/deactivate some bugs which didn't report things in the right order. It will just have extra active/deactiveate actions in normal situation(which the machines don't have this issue). Verified on built-in and non built-in input device machines , no regression found yet. Package in this PPA: https://launchpad.net/~hugh712/+archive/ubuntu/mysru/+packages ---- Summary:Not able to adjust Audio input UI volume, it's gray Steps to reproduce: 1. Plug 3 ring earphone with mic to appropriate jack Expected result: System can be recording audio from external mic Actual result: Not able to adjust Audio input UI volume, it's gray, and no volume detected in UI, but I can recording the input audio by checkbox Failure rate:100% Note. 1. There is no internal mic, just a mic jack on the machine, this issue will happen 2. gnome-control-center version : 1:3.28.2-0ubuntu0.18.04.2 Note:20.04, 19.10, 19.04 are immune on the bug To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-control-center/+bug/1853584/+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
