ubuntu-x-swat team mailing list archive

["I. Ryge" <777627@xxxxxxxxxxxxxxxxxx>]

My ExoPC (running Ubuntu 11.04 with xserver-xorg-input-evdev
1:2.6.0-1ubuntu12 and an eGalax 0eef:72a1 touchscreen) is also affected
by this problem, and I can consistently reproduce it.

It seems that ginn reliably recognizes two-finger gestures if both
fingers make contact with the screen at about the same time. However if
I put one finger down a split second or more before the other, the
gesture is not recognized by ginn and the touchscreen immediately
becomes unresponsive to single-finger input - but the machine doesn't
actually crash; my USB mouse and keyboard continue to work.

Once the touchscreen has entered this broken state, a single-finger
touch produces no response (unable to click or move the cursor), yet
two-finger gestures continue to be recognized and acted on by ginn. If
ginn was running in the terminal before the problem was triggered, I can
see that it continues to report coordinates for both touch points.

Typically Xorg will crash and return to the login screen shortly
(anywhere from a few seconds to a few minutes) after the touchscreen
stops working properly. After logging back in, the touchscreen responds
normally to single-touch input again (but if ginn was running in the
background in the previous session, it remains running, now using
60-100% of the CPU).

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which is subscribed to xserver-xorg-input-evdev in Ubuntu.
https://bugs.launchpad.net/bugs/777627

Title:
  Wetab - double tap/pinch freezes mouse cursor

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