Unwanted events from DVB remote

[Dan Nicholson]

On Sat, Apr 25, 2009 at 11:11 AM, Tony Houghton <h at realh.co.uk> wrote:
> On Sat, 25 Apr 2009 09:23:43 -0700
> Dan Nicholson <dbn.lists at gmail.com> wrote:
>
>> On Fri, Apr 24, 2009 at 8:59 AM, Tony Houghton <h at realh.co.uk> wrote:
>> > My DVB card has a remote control which Linux sees as an input device. I
>> > want to be able to use it by reading its /dev/input/event* node
>> > directly, but there are unwanted side effects because it also generates
>> > events on /dev/console for certain keys which have analogues on a
>> > standard keyboard and pressing its power button causes a shutdown.
>
> [Snip]
>
>> If you only want X to access the device, you can use evdev's
>> GrabDevice option.
>>
>> <merge key="input.x11_options.GrabDevice" type="string">True</merge>
>>
>> This means that you won't be able to use the device with lirc, though,
>> since the events will only be received by X.
>
> Thanks, that's useful to know. Unfortunately it's the opposite of what I
> really want, because I want a specific application to use the remote and
> be able to distinguish between it and a real keyboard. But if X can grab
> the device, maybe my application cn grab it instead. Do you know how the
> grab is achieved, with a flag to open() or an ioctl()/fcntl() or
> something?

Well, if you're not going to use the device through X, then you can
just have X ignore it.

<remove key="input.x11_driver"/>

The grab is achieved through an ioctl with EVIOCGRAB (I think).

--
Dan