You are not logged in.
I have led indicating muted microphone on F4 key (Dell Latitude 5400). By default It's on when mic is muted and off when mic is active.
On certain kernels there is a dedicated mixer control with options "follow mute" and "follow capture" which can invert led behavior.
Mentioned control presents on lts and 5.13 kernels, but is absent on 5.14! No snd-hda-intel options was altered (my option is model=dell-headset-multi), just kernel upgrade. I tried to use different options (and no options), that doesn't works.
What is the cause of such difference? Is it possible to keep this control between kernel upgrades?
Last edited by cucullus (2022-11-10 14:17:36)
Offline
I just discovered that there is (since Mar'21) a control interface under /sys/class/sound/ctl-led/mic/mode.
But I failed to alter mode and can't find any docs on it.
Offline
Suddenly, solved!
'follow-route' should be written into /sys/class/sound/ctl-led/mic/mode.
See https://bugs.archlinux.org/task/71768#comment201634
Offline
