Dongxu,
I'm not able to understand the situation properly. When the cursor is
stuck, you can log the xev events showing the stuck behavior.
MotionNotify event, serial 31, synthetic NO, window 0x3800001,
root 0xaf, subw 0x0, time 2940111, (-2,-2), root:(0,0),
state 0x0, is_hint 0, same_screen YES
MotionNotify event, serial 31, synthetic NO, window 0x3800001,
root 0xaf, subw 0x0, time 2940120, (-2,-2), root:(0,0),
state 0x0, is_hint 0, same_screen YES
But are you sure you cannot demonstrate this stuck behavior in VT, in
evtest. It means you cannot reproduce the bug in VT, is it correct?
What you have to do is simply switch to VT, when everything is all
right. Run evtest, see the events flowing when you touch on your
touchpad and then try to reproduce the bug by touchpad at the upper left
corner and then again touch at different positions to verify whether the
bug has been reproduced or not in VT. Try this very carefully..
--
Pointer stuck in upper-left corner while using touchpad on the upper left
corner in emachines 2350
https://bugs.launchpad.net/bugs/500658
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