[prev in list] [next in list] [prev in thread] [next in thread] 

List:       freedesktop-xorg
Subject:    Re: forcing use of evdev driver for touchpad on DELL E4310 in fedora
From:       Peter Hutterer <peter.hutterer () who-t ! net>
Date:       2011-01-19 2:19:57
Message-ID: 20110119021957.GA12792 () barra ! bne ! redhat ! com
[Download RAW message or body]

On Tue, Jan 18, 2011 at 05:38:30PM +1100, prayner@unimelb.edu.au wrote:
> I need absolute rather than relative position from my touchpad.  At
> Peter Hutterrer's suggestion I installed the following in 
> /etc/X11/xorg.conf.d/99-evdev-touchpad.conf
> Section "InputClass"
>         Identifier "evdev touchpad"
>         MatchIsTouchpad "on"
>         Driver "evdev"
>         Option "Mode" "absolute"
> EndSection
> 
> which works nicely on my DELL D430.
> On my DELL E4310, however, the touchpad isn't recognized
> (see https://bugs.launchpad.net/ubuntu/+source/linux/+bug/637911)
> and I have the same problem as described there, i.e no touchpad
> visible in /proc/bus/input/devices.
> The touchpad works in relative mode, having been initialized, I
> suspect, as a generic mouse.
> My question is whether I can force the use of the evdev driver to
> allow the use of absolute axes or whether there is a low-level problem
> that prevents this.

kernel bug. the kernel needs to send the right magic command to the touchpad
so it actually looks like a touchpad. otherwise it looks like a generic PS2
mouse to us and everything else is hidden by the hardware. this is a common
problem for newer touchpads and usually consists of finding the right magic
sequence.

Cheers,
  Peter
_______________________________________________
xorg@lists.freedesktop.org: X.Org support
Archives: http://lists.freedesktop.org/archives/xorg
Info: http://lists.freedesktop.org/mailman/listinfo/xorg
Your subscription address: freedesktop-xorg@progressive-comp.com
[prev in list] [next in list] [prev in thread] [next in thread]