Hi all, thank you for all the suggestion for the previous topic.
I have another issue I found testing multi-touch on Ubuntu 11.04. I obtain a weird cursor behavior when I set the coordinate transformation matrix of the N-Trig multi-touch screen on Ubuntu 11.04. I observed this problem since I wanted to use a DELL XT2 in portrait format. To rotate the desktop was easy, but then it was also necessary to inform the xinput server how to map the touch point to the portrait reference frame. I already did this on Ubuntu 10.10 and the result was good using the command: xinput set-prop "N-Trig MultiTouch" "Coordinate Transformation Matrix" 0 -1 1 1 0 0 0 0 1 On Ubuntu 11.04 this leads to a cursor that flickers around as you can see in the video I put here http://vimeo.com/23907071 . The cursor actually follows my finger, but it also jumps to 3 or 4 different places, so it is impossible to do anything. I noticed that this problem does not happen if the transformation matrix is only for scale, for example 2 0 0 0 1 0 0 0 1, but it happens if I want to invert the axes, like 0 -1 1 1 0 0 0 0 1. I also noticed that on my Ubuntu 10.10 the xinput was at version 1.5.2 with XI version on server 2.0, while on the Ubuntu 11.04 I have xinput version 1.5.3 with XI version on server 2.1. I got the same problem also using a 3M touch-screen. Any idea? Thank you all, Paolo _______________________________________________ Mailing list: https://launchpad.net/~multi-touch-dev Post to : multi-touch-dev@lists.launchpad.net Unsubscribe : https://launchpad.net/~multi-touch-dev More help : https://help.launchpad.net/ListHelp
