Re: Logitech M705 thumb button

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On Wed, 31 Mar 2010, Octoploid wrote:

> >> (The »unifying USB reciever« has three sub-devices. The first one is
> >> for keyboards, the second for mouses and the third is not used:
> >> usb 3-1: new full speed USB device using ohci_hcd and address 2
> >> input: Logitech USB Receiver as
> >> /devices/pci0000:00/0000:00:12.0/usb3/3-1/3-1:1.0/input/input2
> >> generic-usb 0003:046D:C52B.0001: input,hidraw0: USB HID v1.11 Keyboard
> >> [Logitech USB Receiver] on usb-0000:00:12.0-1/input0
> >> input: Logitech USB Receiver as
> >> /devices/pci0000:00/0000:00:12.0/usb3/3-1/3-1:1.1/input/input3
> >> generic-usb 0003:046D:C52B.0002: input,hiddev96,hidraw1: USB HID v1.11
> >> Mouse [Logitech USB Receiver] on usb-0000:00:12.0-1/input1
> >> generic-usb 0003:046D:C52B.0003: hiddev97,hidraw2: USB HID v1.11
> >> Device [Logitech USB Receiver] on usb-0000:00:12.0-1/input2)
> >>
> >> The rdesc output for the mouse and the third device follows:
> >
> > Thanks for providing the output.
> >
> > The device defines 16 buttons in its report descriptor. How much does it
> > actually physically have?
> 
> 8 if I count correctly (left,middle,right,scrollwheel left,scrollwheel right,
> forward, backward and the hidden (the non working) thumb button).
> Here is a photo of the mouse (the hidden button is located under the
> white underscore below the back and forward buttons):
> http://www.techfresh.net/wp-content/uploads/2010/03/logitech_m705.jpg
> 
> > Is the other (non-used) interface also silent when you press the
> > non-working button? (I can see that it is claimed by HID as well).
> 
> Yes.
> 
> > Could you please apply the patch below and check whether there is still no
> > event present when you press the button?
> >
> 
> Yes, unfortunately there are still no events even with the patch applied.
> (I've tested both interfaces)

Could you please verify that there is indeed no USB event being triggered 
by the button press at all, with usbmon [1]?

If it is the case, I am afraid the only option would be inspecting what 
initialization sequence does the driver for Another OS perform, so that it 
makes the button work.

[1] Documentation/usb/usbmon.txt

-- 
Jiri Kosina
SUSE Labs, Novell Inc.
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