I am experiencing the same problem as animitim (stylus input seems to jump), and I confirm that the issue is related to the latest xserver-xorg-core.
Reverting to previous version: apt-get install xserver-xorg-core=2:1.10.1-1ubuntu1
Solves the problem and pressure works fine with the qt version from utouch ppa (or the one from Scott Kitterman).
So I guess we have to open an issue against xserver-xorg-core...
I am experiencing the same problem as animitim (stylus input seems to jump), and I confirm that the issue is related to the latest xserver-xorg-core.
Reverting to previous version: xorg-core= 2:1.10. 1-1ubuntu1
apt-get install xserver-
Solves the problem and pressure works fine with the qt version from utouch ppa (or the one from Scott Kitterman).
So I guess we have to open an issue against xserver- xorg-core. ..