/usr/share/doc/gpm/README.etouch is in gpm 1.20.4-6.2+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | This file tells how to use gpm and X with a Elotouch screen with
serial interface at 9600 Baud No parity.
CALIBRATION
-----------
Calibration is done in console mode using the program "elocalib"
available from http://www.dobit.com/emblin/pub/elocalib.tgz
See also elocalib --help
To start calibration at console 128x48, for screen 1024x786
> elocalib /dev/ttyS0 -c128 -r48 -w1024 -h768
Touch the upper-left corner and write down the coordinates Xmin, Ymin
Touch the bottom-right corner and write down the coordinates Xmax, Ymax
Update the file gpm-calibration with this coordinates
> cat /usr/local/etc/gpm-calibration
# EloTouch calibration coordinates Xmin Ymin Xmax Ymax
4010 80 80 4010
GPM OPERATION
-------------
> gpm -m /dev/ttyS0 -t etouch -o clickontouch -Rsumma
X OPERATION
-----------
In order to use the touchscreen in X, you should install in your
system the "gpmsumma" module
available from http://www.annet.pl/~anowak/mtouch/gpmsumma_drv.o
or from http://www.dobit.com/emblin/pub/gpm_etouch.tgz
/usr/lib/X11/modules/input/gpmsumma_drv.o
Then add the following sections to your XF86config:
Section "InputDevice"
Identifier "EloTouch"
Driver "gpmsumma"
Option "Device" "/dev/gpmdata"
Option "SendCoreEvents" "On"
EndSection
Section "ServerLayout"
InputDevice "EloTouch" "SendCoreEvents"
...
EndSection
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