On Wed, 2016-03-23 at 21:32 +0000, Ben Hutchings wrote: > Control: tag -1 moreinfo > > On Wed, 2016-03-23 at 18:53 +0000, Tim Wootton wrote: > > > > Package: src:linux > > Version: 4.4.6-1 > > Severity: normal > > > > Dear Maintainer, > > > > * What led up to the situation? > > Upgrade from jessie to stretch > > * What exactly did you do (or not do) that was effective (or > > ineffective)? > > Pressing Thnkpad T410's hardware speaker mute button > > * What was the outcome of this action? > > Speaker mutes, but the button's LED does not illuminate > > * What outcome did you expect instead? > > Expected the LED to illuminate > > > > The mic mute button also exhibits the same behavior, but I had not > > tried this under jessie so don't know if it worked before. > It hasn't worked for me on the quite similar T420. > > > > > The speaker mute certainly did. > [...] > > As far as the kernel is concerned, the mute button is just an ordinary > key on the keyboard (you can see this with the evtest program). You > need a userland daemon to act on it (such as pulseaudio).
Actually I'm not sure that's entirely true - I think that initially the firmware (BIOS) handles the mute button itself, but software can take responsibility for it. There are some hints here for debugging and working around this: https://wiki.archlinux.org/index.php/ThinkPad:_Mute_button Let us know if any of that helps. Ben. > What desktop environment are you using? -- Ben Hutchings Anthony's Law of Force: Don't force it, get a larger hammer.
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