On 24/03/16 02:10, Alex Goebel wrote: > In 3.19, the way the kernel handles that button was changed from > hardware to software. You'll need > > options thinkpad_acpi software_mute=0 > > in modprobe.d/ to get the old behaviour back. Thanks Alex, that did the trick. Could this be added by default so as not to break existing functionality on upgrade? > > -Alex >