I'm also affected, using the same machine (Thinkpad T410s with N-Trig MultiTouch).
For reference I attached an image created with the gimp using a 1-pixel brush, I held my finger steadily at one point on the screen for ~3 seconds with moderate pressure. The blob has a diameter of ~10 pixels, with substantial pressure it grows to 15~20 pixels. The jitter frequency is very high (holding the finger for only one second produces almost the same blob). With this jitter the touchscreen is only usable for button presses and the likes, painting, dragging, scrolling is very frustrating. Windows drivers not only filter the noise out perfectly, border reach is also improved. With Ubuntu, it's almost impossible to point closer than 20 pixels to the borders of the screen. It seems that under Windows some kind of formula re-maps the coordinates when close to a border, that'd be a great feature in mtdev or the n-trig driver (Let me know if I'm supposed to fill another bug for this). ** Attachment added: "n-trig_jitter_3sec.png" https://bugs.launchpad.net/ubuntu/+source/utouch/+bug/620520/+attachment/1530415/+files/n-trig_jitter_3sec.png -- touch sensor very jittery https://bugs.launchpad.net/bugs/620520 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
