Re: Logitech M705 thumb button

[Octoploid <cryptooctoploid@gmail.com>]

On Fri, Apr 2, 2010 at 12:05 PM, Jiri Kosina <jkosina@suse.cz> wrote:
> 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]?

I already verified this, but forgot to mention it in my last mail.
There are indeed no USB events being triggered when I run
"cat /sys/kernel/debug/usb/usbmon/ou".

> 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.

Any pointers on how I could accomplish this?
Thanks in advance.
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