Raw mouse input is distorted

Søren Hauberg hauberg at gmail.com
Thu Sep 18 02:39:05 PDT 2008

2008/9/18 Peter Hutterer <peter.hutterer at who-t.net>:
> On Wed, Sep 17, 2008 at 09:26:08PM +0200, Simon Thum wrote:
>> Maybe evdev works better? I seems there is a problem when both absolute
>> AND relative axes are exposed,
> The reason for this is that there's a couple of popular devices
> (keyboard/mouse combos) that claim to have both relative x/y axes and absolute
> x/y axes simultaneously.
> You lose the ability to go past the min/max reported for x/y (which in my case
> was 255/255). It can be fixed in the driver, but nobody volunteered for it
> yet.
> If you feel like it: https://bugs.freedesktop.org/show_bug.cgi?id=17637

>From what I can see from the kernel code, my setup only generates
EV_ABS events, but it is possible that the module reports that it can
do relative events as well. Do you know what I should be looking for
to see if the kernel reports that it can do relative movements?

Can I somehow force the evdev driver to only accept absolute events?

I'll see if I can find the time to look into fixing the issue, as I
guess it could be related to my problems. But like everybody else I'm
in lack of time, so I'm not sure if it'll be doable.


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