I had some issues with calibration as well, here is my experience :
* Problem 1 : ev_calibrate searches for /empty_cursor.xpm (bug that
should be fixed), thus, no display is available. Copying the xpm at the
right place "/" solves the issue.
* Problem 2 : no text is present, to activate the calibration once the
screen is white, simply press "Enter", then crosses become red and you
have to click on each ones
First possible problem :
In your xorg.conf file, be sure to remove any reference to options MinX,
MinY, MaxY, MaxY options, it modifies calibration, then values are
simply completely wrong. Also add the Option Calibrate "1".
Then your file will look like :
Section "InputDevice"
Identifier "touchscreen"
Driver "evtouch"
Option "Device"
"/dev/input/by-id/usb-Elo_TouchSystems__Inc._Elo_TouchSystems_2700_IntelliTouch_r__USB_Touchmonitor_Interfac_20000000-event-joystick"
Option "DeviceName" "touchscreen"
Option "ReportingMode" "Raw"
Option "Emulate3Buttons" "false"
#Option "Emulate3Timeout" "50"
Option "SendCoreEvents" "On"
Option "Calibrate" "1"
EndSection
Re-launch calibration, it will creates a out.txt file that you should
include in the Section.
And before relaunching X (or gdm or whatever), be sure to comment the
Calibrate option with a # otherwise with some screens, values won't be
correct.
--
Uncalibrated and can't calibrate with 0.8.7-2 on Samsung Q1 Ultra
https://bugs.launchpad.net/bugs/163850
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