On Sat, 22 Aug 2015 14:48:22 +0200 Idwer Vollering vidwer@gmail.com wrote:
Boot into vendor BIOS/EFI thing, install and start acpi_listen, then press the mute button. http://linux.die.net/man/8/acpi_listen
and take a look on "Interaction with the Embedded Controller" at https://wiki.ubuntu.com/Kernel/Reference/ACPITricksAndTips
you want to know which _QXX function is called. maybe that one is empty in the coreboot aml for h8s..