Evdev for a touchscreen w/ digitizer

[Cedric Sodhi]

Hello,

There is an EETI eGalax 0eef:a001 Touchscreen and a Wacpm 056a:0090
ISDV4 stylus device.

Evtest output for a simple "tap" on the eGALAX is attached.

With Xorg 1.12.2, inputproto 2.2 on gentoo, "xinput list egalax" yields

eGalax_eMPIA Technology Inc. PCAP MultiTouch Controller id=13   [slave
pointer  (2)]
Reporting 3 classes:
	Class originated from: 13
	Buttons supported: 5
	Button labels: Button Unknown Button Unknown Button
Unknown Button Wheel Up Button Wheel Down
	Button state:
	Class originated from: 13
	Detail for Valuator 0:
		Label: Abs MT Position X
		Range: 0.000000 - 32760.000000
		Resolution: 0 units/m
		Mode: absolute
		Current value: 640.000000
	Class originated from: 13
	Detail for Valuator 1:
		Label: Abs MT Position Y
		Range: 0.000000 - 32760.000000
		Resolution: 0 units/m
		Mode: absolute
		Current value: 400.000000

But there are no events reported, instead, Xorg.0.log lists

[ 25099.433] [dix] eGalax_eMPIA Technology Inc. PCAP MultiTouch
Controller: unable to find touch point 0

Could you help? What should I do?

And even if I get the eGalax to work through evdev - how do I make the
Stylus take "precedence" over the touchscreen, so that I can rest my
palm on the screen while writing, without the two devices fighting for
the pointer?

Thank you,
Cedric
-------------- next part --------------
Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0xeef product 0xa001 version 0x210
Input device name: "eGalax_eMPIA Technology Inc. PCAP MultiTouch Controller"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 330 (BTN_TOUCH)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value  26816
      Min        0
      Max    32760
      Fuzz       7
    Event code 1 (ABS_Y)
      Value  14784
      Min        0
      Max    32760
      Fuzz       7
    Event code 47 (ABS_MT_SLOT)
      Value      0
      Min        0
      Max        1
    Event code 53 (ABS_MT_POSITION_X)
      Value      0
      Min        0
      Max    32760
      Fuzz       7
    Event code 54 (ABS_MT_POSITION_Y)
      Value      0
      Min        0
      Max    32760
      Fuzz       7
    Event code 57 (ABS_MT_TRACKING_ID)
      Value      0
      Min        0
      Max    65535
Properties:
  Property type 1 (INPUT_PROP_DIRECT)
Testing ... (interrupt to exit)
Event: time 1338733218.242186, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 26160
Event: time 1338733218.242189, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 12256
Event: time 1338733218.242210, type 3 (EV_ABS), code 0 (ABS_X), value 26160
Event: time 1338733218.242212, type 3 (EV_ABS), code 1 (ABS_Y), value 12256
Event: time 1338733218.242215, -------------- SYN_REPORT ------------
Event: time 1338733218.305181, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 12304
Event: time 1338733218.305202, type 3 (EV_ABS), code 1 (ABS_Y), value 12304
Event: time 1338733218.305204, -------------- SYN_REPORT ------------