According to this page:
http://www.linux-usb.org/devices.html
HID Monitor support neither exists nor is it being worked on. Is this
still correct? I was hoping it would be fairly easy to do simple
stuff like brightness control from user space (perhaps via libusb).
The monitor I'm interested in looks pretty simple (see below).
However, apart from usage 0080.0002 (EDID info) and 0082.0010
(Brightness), I don't know what the other usages mean, as they are not
listed in the USB Monitor Control Class Specification. Perhaps they'd
be in the VESA Monitor Control Command Spec, but I don't have access
to that document.
--david
INPUT(228)[INPUT]
Field(0)
Usage(1)
0082.00e4
Logical Minimum(0)
Logical Maximum(255)
Report Size(8)
Report Count(2)
Report Offset(0)
Flags( Variable Absolute )
FEATURE(2)[FEATURE]
Field(0)
Usage(1)
0080.0002
Logical Minimum(0)
Logical Maximum(255)
Report Size(8)
Report Count(257)
Report Offset(0)
Flags( Variable Absolute BufferedByte )
FEATURE(16)[FEATURE]
Field(0)
Usage(1)
0082.0010
Logical Minimum(0)
Logical Maximum(255)
Report Size(8)
Report Count(2)
Report Offset(0)
Flags( Variable Absolute )
FEATURE(214)[FEATURE]
Field(0)
Usage(1)
0082.00d6
Logical Minimum(0)
Logical Maximum(4)
Report Size(8)
Report Count(2)
Report Offset(0)
Flags( Variable Absolute )
FEATURE(231)[FEATURE]
Field(0)
Usage(1)
0082.00e7
Logical Minimum(0)
Logical Maximum(3)
Report Size(8)
Report Count(2)
Report Offset(0)
Flags( Variable Absolute )
hiddev96: USB HID v1.00 Device [Studio Display] on usb-0000:a0:01.0-2.1.3
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