Re: [PATCH] Handle spurious backslash key repeats on some keyboards

[Fredrik Hallenberg <megahallon@gmail.com>]

Is the country tag derived from the bCountryCode seen in the HID
device descriptor seen when doing "lsusb -v"?
If so it probably wont work as it says "0 (Not supported)" on my
keyboard and a few others I have tested.

On Fri, Sep 12, 2014 at 12:29 PM, David Herrmann <dh.herrmann@gmail.com> wrote:
> Hi
>
> On Thu, Sep 11, 2014 at 10:35 PM, Fredrik Hallenberg
> <megahallon@gmail.com> wrote:
>> Thanks I had no idea about the hwdb but I have tried it now, it works if I use
>>
>> KEYBOARD_KEY_70031=reserved
>
> Thanks for confirming!
>
>> on my nordic keyboard, but a US keyboard user would have to use
>> scancode 70032 instead. If you chose the wrong one the backslash key
>> will be disabled.
>>
>> I don't think this is good solution as long as there is no way to
>> detect which version is used with the hardware matcher string.
>
> Well, you can match on "country" tags. Currently, the device
> identifiers contain vendor+product+version+country information. I
> assume the "country" field is different between your keyboard and a
> keyboard that swaps the key reports.
>
>> However I suppose udev should make it possible to do some kind of
>> script that does something similar to my original patch, that is,
>> detects which of the two keys in actually used and disables the other
>> one.
>
> If you post your mod-alias line of your device (or better: all
> information you can gather about the device), I can push it into hwdb.
> It is up to Dmitry and Jiri to decide whether it makes sense to deal
> with it in the kernel.
>
> Thanks
> David