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I upgraded from 10.04 to 10.10 because i could not get my touchscreen to calibrate correctly, although I tried using the xinput_calibrator tool. In 10.04 i was able to get the touchscreen to react to a touch (although badly calibrated) by installing multitouch-kernel-source (bytetips.com/touchscreen-support-ubuntu) but there was no calibrator tool installed by default.

I upgraded to 10.10 and now there is a built-in calibrator (which I used several times with no effect), but the touchscreen is not working (ie, cursor shows no reaction to touching screen). There is a terminal window that never closes (without me manually closing it) which says:

Warning: multiple calibratable devices found, calibrating last one (Quanta Computer Inc. Optical Touch Screen)
 use --device to select another one.
Calibrating standard Xorg driver "Quanta Computer Inc. Optical Touch Screen"
 current calibration values: min_x=0, max_x=1023 and min_y=0, max_y=767
 If these values are estimated wrong, either supply it manually with the --precalib option, or run the 'get_precalib.sh' script to automatically get it (through HAL).
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closed as too localized by Bruno Pereira, Marco Ceppi Feb 2 '12 at 17:48

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

    
This question seems abandoned, there is not further information or activity added to it for several months. I am flagging this to be closed by a moderator. If you think this issue is still affecting you you can flag a moderator to re-open it. –  Bruno Pereira Feb 2 '12 at 16:44

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