Messages in this thread | | | Date | Fri, 15 Jun 2018 20:36:28 -0300 | From | Henrique de Moraes Holschuh <> | Subject | Re: ThinkPad T480s & LED_MUTE, LED_MICMUTE |
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On Fri, 15 Jun 2018, Pali Rohár wrote: > This means that kernel should not export any led class device. Or when > exported, then "set" operation should always fail.
"not export" is right.
> > 2. Otherwise implement it in-kernel, so that userspace cannot unmute > > when the human has activated the "mute" switch, and the LED cannot be > > controlled by userspace to lie (report mute when it is not mute). > > This looks like a good candidate to use led "trigger" interface. Create > a mute trigger and attach it to that led device.
Maybe, as long as done in-kernel and not possible to mess with from userspace.
> means set. What is SHDA doing, I have not figured out. It does not
Look at the HDA mixer state, SHDA is likely to be directly messing with it.
-- Henrique Holschuh
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