[Bug 365943] Re: Mouse cursor jumps when two fingers are used

[Alberto Milone]

I found the cause of the problem and I dramatically reduced the problem
(we tested this in the OEM team).

Sometimes the reported movement deltas are too big to actually take
place in 20 milliseconds or less (no human hand would ever be able to
move this fast).

Furthermore, a comparison between the timestamps collected in
priv->move_hist and the ones I'm getting for each event shows that
something goes wrong and that one or more events are skipped, hence the
deltas are wrong (i.e. bigger than they should really be). The next
event is wrong too.

Currently, as you can see in the attached patch, I tell the driver to
ignore these events and it seems to correct the driver's behaviour.
Knowing why some events are skipped would be even better though.

** Attachment added: "111_fix_jumpy_cursor.patch"
   http://launchpadlibrarian.net/25916812/111_fix_jumpy_cursor.patch

-- 
Mouse cursor jumps when two fingers are used
https://bugs.launchpad.net/bugs/365943
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.

-- 
ubuntu-bugs mailing list
ubuntu-bugs at lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs