ubuntu-x-swat team mailing list archive

[Yan Li <yan.i.li@xxxxxxxxx>]

Created attachment 40902
Add JumpyCursorThreshold option patch v5

For those touchpads that don't support multi-finger or sending correct
finger width, the jumpy cursor problem is still there. One notable
example is the ClickPad found on Lenovo S10-3t whose ClickPad suffers
from this jumpy cursor problem very severely, because its buttons also
have sensible surface thus every time you click a button without lifting
another finger from the pad, such as when trying to drag a window or
select text, the cursor jumps, and renders the whole touchpad nigh
unusable.

(if you are wondering why Synaptics driver doesn't enable ClickPad mode
and limit the touch area thus ignore ABS sent from button area, it's
because those ClickPads send out BTN_LEFT and BTN_RIGHT just as normal
touchpads so they don't trigger the ClickPad mode, which is designed for
ClickPads that never send BTN_RIGHT)

Therefore Alberto Milone's JumpyCursorThreshold option patch is still
needed, which is the best solution I've seen so far. I've attached the
new patch I ported to head. I've tested it in MeeGo and it works very
well (with Threshold set to 250).

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https://bugs.launchpad.net/bugs/365943

Title:
  Mouse cursor jumps when two fingers are used

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