Multitouch doesn't work on Debian Wheezy

Frime

Hi all,

I have a debian wheezy system with Qt 5.5 and an USB Multitouch screen.

mtdev-test works and shows the correct number of recognized fingers (up to 10)
export QT_XCB_DEBUG_XINPUT_DEVICES=1 displays the following:

# some other devices....
qt.qpa.input.devices: input device  3M 3M MicroTouch USB controller
qt.qpa.input.devices:    has 5 buttons
qt.qpa.input.devices:    has valuator "Abs X" recognized? true
qt.qpa.input.devices:    has valuator "Abs Y" recognized? true
qt.qpa.input.devices:    has valuator "Abs MT Position X" recognized? true
qt.qpa.input.devices:    has valuator "Abs MT Position Y" recognized? true
qt.qpa.input.devices:    has valuator "" recognized? false
qt.qpa.input.devices:    has valuator "" recognized? false
qt.qpa.input.devices:    it's a scrolling device

Well, okay... a scrolling device!?

export QT_LOGGING_RULES=qt.qpa.input=true and touching on the screen displays:

qt.qpa.input: XI2 mouse motion 939,690, time 3870757
qt.qpa.input: XI2 mouse motion 976,671, time 3870778
qt.qpa.input: XI2 mouse motion 1025,648, time 3870778
qt.qpa.input: XI2 mouse motion 1084,613, time 3870781
qt.qpa.input: XI2 mouse motion 1151,576, time 3870789
qt.qpa.input: XI2 mouse motion 1220,551, time 3870797

So... Does anybody has an idea how to tell Qt that this is a multitouch device?
Setting QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS to the appropriate event didn't helped.

Thank you very much in advance!!

TopKool

Hi,

Did you finally find out a solution?