I am using Linux (2.6.39 kernel) and I am trying to find a way that would allow me to send volume increment/decrement commands from my host OS to the Jabra device. I saw that this functionality is possible both in Windows and Ubuntu, where controlling the volume from the PC alters the Jabra volume leds.
I can accept Consumer HID volume increment/decrement commands from the Jabra to my systemm, but not the other way around. Also, I can send mute/off-hook commands to the Jabra (using HIDIOCSUSAGE ioctl), but I can't find the corresponding usage id for the volume controls.
I would appreciate your insights!