Comment 9 for bug 201391

The suggested workaround won't work: the "/etc/acpi/volupbtn.sh" is not called when pressing the volume hardware keys. It's the other way around: the script is simulating a hardware key press. And in addition the nice OSD bar with the volume percentage won't appear any longer. So, the best outcome would be controlling the USB volume with some shortcuts. I couldn't use the hardware keys as keys for a shortcut - I am using "xbindkeys" program.