[Bug 667802] Re: Tap is sometimes not registered on touchscreens

[Henrik Rydberg]

debb1046,

If you are up for it, this issue seems to be a perfect example to start
our user test database.

1. Compile evemu (bzr branch lp:utouch-evemu)

2. Find the event node of your device (grep -i galax
/proc/bus/input/devices -A4 | grep H:)

3. Extract the device definition (sudo ./tools/evemu-describe
/dev/input/eventX > wetab.prop)

4. Start a recording (sudo ./tools/evemu-record /dev/input/eventX >
wetab.event)

5. Perform the test that fails - the recording will stop after ten
seconds of inactivity.

6. Attach the wetab.prop plus wetab.event files here with a description
of the failure.

With this data, it is possible to reproduce the problem exactly, and the
test can be used during development.

Thanks!

-- 
Tap is sometimes not registered on touchscreens
https://bugs.launchpad.net/bugs/667802
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Status in uTouch-grail: New

Bug description:
Vincent Gerris wrote on 2010-10-04 (from #637106):

What happens is, that if I touch the screen, the cursor does not move from the previous position sometimes.
For example when I touch 6 different places on the screen, the cursor would follow 3 times and the other 3 not (it would remain at the 3rd position).

Things that effect this: when I press harder on the screen, sometimes the cursor does appear on that spot.
When I touch and then drag, the cursor always follows.

This is a confirmed problem, and a patch for it is on its way.

TEST CASE: Visible on touchscreens. Move a single finger around the screen, and tap lightly with a few seconds interval. The pointer will follow sometimes, and sometimes it will not. With the patch, the pointer will follow every time.