在CentOS中設定TrackPoint

轉載自：http://centos.org/modules/newbb/viewtopic.php?topic_id=12665&forum=39

 

The Ultranav Trackpoint on Thinkpads has a great middle button scrolling
ability. Some distros [read: Ubuntu, openSUSE] have little to no
problem configuring it because, unlike Fedora and CentOS, they have
decided to keep the /dev/psaux device instead of completely using the
/dev/input/ devices. I searched around and could not find a good way to
configure the scrolling in CentOS. Finally, I did some detective work
and this is what I found. This is using a IBM ThinkPad T42, but should
probably work on must UltraNav equipped ThinkPads.

The default
CentOS 5 install configures a single input device using the Synaptics
driver. This will give you some 99% of the functionality, but will not
allow you to configure Trackpoint scrolling. Here is what it looks
like.

Section "InputDevice"
Identifier "Synaptics"
Driver "synaptics"
Option "Device" "/dev/input/mice"
Option "Protocol" "auto-dev"
Option "Emulate3Buttons" "yes"
EndSection


What
we need to do is have two sections; one for the Synaptics touchpad and
another for the Trackpoint. Since /dev/psaux does not exist, we need to
find out where the specific touchpad device file is.


[msiner@luigi
Desktop]$ cat /var/log/Xorg.0.log | grep Synaptics
(**) |-->Input Device "Synaptics"
(II) Synaptics touchpad driver version 0.14.4 (1404)
(--) Synaptics auto-dev sets device to /dev/input/event1
(--) Synaptics touchpad found
(**) Synaptics: always reports core events
...


Since
it is at /dev/input/event1 (use that command on your own machine
because yours may be different), we can configure the trackpoint at
/dev/input/mice and the touchpad at /dev/input/event1. The last trick
we need is to also use the "SendCoreEvents" option to make sure both of
them work. Here is my xorg.conf configuration for the device. Notice
that I included the ServerLayout section as it had to be changed.

Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Trackpoint"
InputDevice "Synaptics"
EndSection

...

Section "InputDevice"
Identifier "Trackpoint"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "ZAxisMapping" "4 5"
Option "EmulateWheel" "true"
Option "EmulateWheelButton" "2"
EndSection

Section "InputDevice"
Identifier "Synaptics"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/input/event1"
Option "Protocol" "auto-dev"
Option "Emulate3Buttons" "yes"
Option "SHMConfig" "on"
EndSection

...


This
setup has worked for me and I hope this post helps somebody else who is
having trouble with this or had just accepted the sad fate of not
having Trackpoint scrolling. Some of you might have figured this out
already, but I cound not find any info through Google or even ThinkWiki.