yes, I can confirm this bug exists in 10.10 maverick.
To reproduce the bug:
randomly touch the upper-left corner of the touchpad, usually within seconds,
the mouse pointer jumps to X root:(0,0), i.e., the upper-left corner of screen,
and trying to move the pointer is futile thereafter.
A way to workaround, hit Alt-F7 (move window), then, the pointer jumps
and can be moved again.
I found no error message in logs, so I try to log X events using xev. A
sample of xev output is attached. When the pointer stuck, pointer moving
events are recorded as,
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
** Attachment added: "xev output showing mouse pointer stuck to root window
(0,0)"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/500658/+attachment/1728495/+files/xev.txt
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pointer stuck in upper-left corner while using touchpad
https://bugs.launchpad.net/bugs/500658
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