After reviewing code some more, I believe the issue lies in the X
server. With the addition of masked valuators, you could have an event
that has an X and Pressure value changes, but not a Y value change. The
following is the axis mapping:
0: X
1: Y
2: Pressure
In XI 1.x, the protocol sends a range of changed values. If axis 0 and 2
change, 1 has to be sent with it. Since Y didn't change, axis 1 is being
sent with a value of 0. It needs to send the previous value in this
case.
The good news is that the fix shouldn't be too difficult. I will
probably get to it early next week.
** Package changed: xserver-xorg-input-evdev (Ubuntu) => xorg-server
(Ubuntu)
** Changed in: xorg-server (Ubuntu)
Status: Invalid => In Progress
** Changed in: xorg-server (Ubuntu)
Milestone: None => ubuntu-11.04
** Changed in: xorg-server (Ubuntu)
Assignee: (unassigned) => Chase Douglas (chasedouglas)
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https://bugs.launchpad.net/bugs/736500
Title:
very jumpy cursor with wacom-dkms
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