Open Input Framework

calibrate error on dual monitors

Asked by Victor Zurita M.

I have an Acer T230H TouchScreen and also an AOC LCD monitor, but when I want to use 1 touch monitor, touch area assumes the width of two monitors, that is, I can play with the touch monitor, both screens. So accuracy is not right touch monitor.

There is a tool to solve this problem?

Best Regards,
Victor Zurita M.
<email address hidden>

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Victor Zurita M. (atiruz) said : 		#1

My OS is Ubuntu Maverick 10.10, of course

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Launchpad Janitor (janitor) said : 		#2

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

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Duncan McGreggor (oubiwann) said : 		#3

More information forth-coming...

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Victor Zurita M. (atiruz) said : 		#4

The problem was resolved. The configuration of the monitor should be Xinerama, but I was changing the window display manager of ATi's Catalyst Control Center. I changed the option to Xinerama and it worked fine.

Thanks anyway,
Victor Zurita M.

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theLawman (billieboy) said : 		#5

I have this same issue on an Acer T230H TouchScreen in Natty however i cant use Xinerama as it doesn't seem to work with compiz and I can't log in.

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Victor Zurita M. (atiruz) said : 		#6

In my case, I could configure Xinerama because I use an ATI RADEON, and I had the option in the ATi's Catalyst Control Center.

If you have a video card Nvidia, you must change the option in "nvidia-settings", otherwise, you should change from the application of administration.

Best regards,
Victor Zurita M.

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theLawman (billieboy) said : 		#7

Victor

I use an ATI RADEON too but when I activated Xinerama in the Caralyst control Centre I was then unable to load Unity next time I logged in. Was able to log into Classic with no effects but not Unity.

Correction the screen is a T231H.

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Victor Zurita M. (atiruz) said : 		#8

When I enable the touchscreen and calibrate correctly, I disabled the desktop effects.

My tests were done with Maverick, so when I upgraded to Natty, I decided to use Unity and not have the option of touchscreen.

I think the touchscreen works well, but limits some advantage of the OS, are some things that must improve "utouch".

Best regards,
Victor Zurita M.

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Linus Seelinger (s-linus) said : 		#9

I'm have an Intel Ironlake Mobile card.
Dual-head using the internal monitor and a T230H works perfectly - except for the problem originally mentioned here (the touchscreen works as if it spanned across both screens).

I could solve this using:
xinput set-prop "Acer T230H" "Coordinate Transformation Matrix" 0.5843 0 0.4157 0 1 0 0 0 1
(from http://ubuntuforums.org/showthread.php?t=1743372)
This makes the touchscreen translate into correct coordinates.

However, this seems not to affect utouch (or at least touchegg, which uses utouch: https://code.google.com/p/touchegg/issues/detail?id=82). So, uTouch still takes the wrong coordinates despite the changed transformation.

Do you have any clue how to make uTouch take and interpret the right coordinates?