Multitouch displays

From ArchWiki
Revision as of 07:24, 23 January 2012 by Gjasso (Talk | contribs) (Configuration)

Jump to: navigation, search

Tango-document-new.pngThis article is a stub.Tango-document-new.png

Notes: please use the first argument of the template to provide more detailed indications. (Discuss in Talk:Multitouch displays#)

Since Linux Kernel 3.2, multitouch devices are handled by the hid-multitouch module, see Kernel Modules.


Find the vendor ID (VID) and product ID for your touchscreen using lsusb:

$ lsusb
Bus 004 Device 002: ID 0eef:725e D-WAV Scientific Co., Ltd 

Here, VID=0eef (eGalax) and PID=725e. Now, get the MT_CLASS_* definitions for the VID from [1]. In this example

#define MT_CLS_EGALAX                           0x0103

an convert it to decimal (0x0103=259 in this case).

After loading the hid-multitouch, see Kernel Modules, you need to pass the devices' options with

# echo 3 VID PID MT_CLASS_* > /sys/module/hid_multitouch/drivers/hid\:hid-multitouch/new_id

In this example,

# echo 3 0eef 725e 259 > /sys/module/hid_multitouch/drivers/hid\:hid-multitouch/new_id

Reboot. If the touchscreen is not working properly, you may need to install a specific driver for your touchscreen, see #Drivers.


Tango-view-fullscreen.pngThis article or section needs expansion.Tango-view-fullscreen.png

Reason: please use the first argument of the template to provide a brief explanation. (Discuss in Talk:Multitouch displays#)


The driver for eGalax tocushcreens is available from the eGalax website. Also, it is availbale as xf86-input-egalax-linux3AUR from the Arch User Repository.

Invert Y-axis

If after installing the eGalax driver the Y-axis of the touchscreen is inverted, edit the file /etc/eGTouchd.ini an change the value of Direction from 0 to 2:

DetectRotation 0
Direction 2
Orientation 0