HDA-VERB -- Send a HD-audio command hda-verb is a small program to send HD-audio commands to the given ALSA hwdep device on the hd-audio interface. First off, build HD-audio driver with hwdep support. For the kernel config, set CONFIG_SND_HDA_HWDEP=y. When you build ALSA drivers from alsa-driver tarball, usually this is set automatically. Once snd-hda-intel driver is built with the hwdep support, you should have a hwdep device such as /dev/snd/hwC0D0. The program takes four arguments, the hwdep device name, the widget NID, the verb and the parameter. For example, % hda-verb /dev/snd/hwC0D0 0x12 0x701 2 The verb argument can be a string like "PARAMETERS". Also the parameter argument can be a string like "VENDOR_ID" as well. % hda-verb /dev/snd/hwC0D0 0x0 PARAMETERS VENDOR_ID The string is case insensitive. Also, it doesn't have to be the full string but only has to be unique. E.g. "par" is enough to mean "PARAMETER", and "set_a" is enough as "SET_AMP_GAIN_MUTE". % hda-verb /dev/snd/hwC0D0 2 set_a 0xb080 The program executs the given verb, shows the result and quits. Usually you need to be root to run this command. *WARNING* Use this program carefully. Sending an invalid verb may screw up the codec communication, which requires either a reboot or reloading of the sound driver eventually.