On Sat, Feb 10, 2018 at 12:15:34AM -0200, Henrique de Moraes Holschuh wrote: > Kindly read this: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/plain/Documentation/laptops/thinkpad-acpi.txt > > You want the section about volume control. > > Thanks. Many thanks Henrique, that was what I was looking for -F