Re: Elographics touch driver

[Andreas Höschler <ahoesch@smartsoft.de>]

Hi all,

> > I installed the xserver-xorg-input-elographics package and it seems to
> > work. I can move the mouse by touching the display. However, some
> > calibration seems to be needed. Touching the display does not move the
> > mouse under my finger. I can just move the mouse pointer by dragging
> > over the display at an arbitrary location.
> >
> > I tried to play with stuff like
> >
> > Section "InputDevice"
> > Identifier "ELO touchscreen"
> > Driver "elographics"
> > Option "Device" "/dev/psaux"
> > Option  "MinimumXPosition"      "300"
> > Option  "MaximumXPosition"      "3700"
> > Option  "MinimumYPosition"      "300"
> > Option  "MaximumYPosition"      "3700"
> > Option  "UntouchDelay"  "10"
> > Option  "ReportDelay"   "10"
> > Option  "SendCoreEvents"        "yes"
> > EndSection
> >
> >
> > in /etc/X11/xorg.conf but these entries (existence or not) have no
> > effect on the behaviour of the touch screen. Where can this driver be
> > configured/calibrated and is it possible to have absolute coordinates,
> > meaning that the mouse pointer is braught the the position of my finger
> > when touching the screen?
>
> It is a blind shot, but in wacom driver, when it is not correctly loaded, it 
> behaves like a mouse (i.e. no absolute positioning), which correlates with 
> your story.  Review your /var/log/Xorg.0.log for any problem loading the 
> driver.

OK, I now have xserver-xorg-input-elographics installed and the following entries in  /etc/X11/xorg.conf.

Section "InputDevice"
Identifier "ELO touchscreen"
Driver "elographics"
Option "Device" "/dev/psaux"
Option  "MinimumXPosition"      "3000"
Option  "MaximumXPosition"      "3700"
Option  "MinimumYPosition"      "3000"
Option  "MaximumYPosition"      "3700"
Option  "UntouchDelay"  "10"
Option  "ReportDelay"   "10"
Option  "SendCoreEvents"        "yes"
Option  "ScreenNumber"  "0"
Option  "ButtonNumber"  "1"
EndSection

Section "ServerLayout"
...
InputDevice     "Generic Keyboard"
InputDevice     "Configured Mouse"
InputDevice     "ELO touchscreen" "SendCoreEvents"
EndSection

After restarting X the touch still behaves like a mouse (no absolute ositioning) and in /var/log/Xorg.0.log I get

debian:/usr/lib/xorg/modules/input# tail -f /var/log/Xorg.0.log
Elographics: Dropping one byte in an attempt to synchronize: 'Elographics: Dropping one byte in an attempt to synchronize: '' 0x18
Elographics: Dropping one byte in an attempt to synchronize: '╴' 0xFB
Elographics: Dropping one byte in an attempt to synchronize: '' 0x1
Elographics: Dropping one byte in an attempt to synchronize: '' 0x18
Elographics: Dropping one byte in an attempt to synchronize: '╴' 0xFC
Elographics: Dropping one byte in an attempt to synchronize: '' 0x2
Elographics: Dropping one byte in an attempt to synchronize: '' 0x18
Elographics: Dropping one byte in an attempt to synchronize: '╴' 0xFD
Elographics: Dropping one byte in an attempt to synchronize: '' 0x2
Unable to ask Elographics touchscreen identification

Any idea?

Thanks,

Andreas