xorg.conf - what to do for an input device

[Paulo Cavalcanti]

On Sat, Jan 24, 2009 at 5:35 PM, Dan Nicholson <dbn.lists at gmail.com> wrote:

> 2009/1/24 Paulo Cavalcanti <promac at gmail.com>:
> > Hi,
> >
> > I was looking at xorg.conf on Fedora 10, and
> > my question is: what is the correct approach,
> > when an input device does not work as it was supposed to?
> >
> > In my case, I have an old tablet (Genius) that was detected,
> > but its surface area is not mapped correctly onto the screen.
> > Moving the stylus less than half an inch, makes the cursor cross
> > the entire screen.
> >
> > In the past, I used an alternative driver, which was configured
> > in xorg.conf. Now, this same driver has an undefined external
> > reference "xf86errno" in F10.
> >
> > Even if I fix the driver, since the input devices are detected
> > automatically,
> > the only way (I see) of using the alternative driver is including
> >
> > Section "ServerFlags"
> >         Option "AutoAddDevices" "false"
> > EndSection
> >
> > in xorg.conf. But this will force me to specify all other
> > input drivers one by one, in xorg.conf, that is, it is an
> > "all or nothing" approach. Is that correct?
>
> Yeah. An alternative is just to disable hotplugging from HAL for a
> specific device. Until the features I needed were ported to the evdev
> driver, I had to keep using mouse for my trackpoint. By removing the
> input.x11_driver field, Xorg won't try to hotplug it:
>
> $ cat /etc/hal/fdi/policy/no-hotplug-trackpoint.fdi
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <deviceinfo version="0.2">
>  <device>
>   <match key="info.product" contains="TrackPoint">
>     <remove key="input.x11_driver"/>
>   </match>
>  </device>
> </deviceinfo>
>
> Look at the lshal output to find appropriate fields to match on for your
> device.
>
> > The other option is trying to make the detected driver
> > use  the correct mapping, by suppling some parameters.
> >
> > According to the instructions available here
> >
> > https://fedoraproject.org/wiki/Features/EvdevInputDriver
> >
> > I would have to look at this file:
> >
> >  /usr/share/hal/fdi/policy/10osvendor/10-tabletPCs.fdi
> >
> > However, I did not see anything that I could change
> > to fix my problem.
>
> I'm not really sure how the tablet calibration works. What was the old
> driver you were trying to use?
>
>
It was called wizardpen. It always worked well for my tablet on FC6/F8.

However, the new X does not have xf86errno anymore. I think it is just
a plain errno now, but I am not sure.

-- 
Paulo Roma Cavalcanti
LCG - UFRJ
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