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

[Didier Roche]

Hey Henrik, just to confirm from  lp:~utouch-team/utouch-grail/packaging
branch, I get this:

dpkg-source: info: construction de utouch-grail à partir de ./utouch-grail_1.0.16.orig.tar.gz
patching file src/grail-api.c
Reversed (or previously applied) patch detected!  Skipping patch.
1 out of 1 hunk ignored -- saving rejects to file src/grail-api.c.rej
dpkg-source: erreur: LC_ALL=C patch -t -F 0 -N -p1 -u -V never -g0 -E -b -B .pc/0001-Report-touch-down-on-one-finger-entry.patch/ < utouch-grail-1.0.16.orig.shaNdj/debian/patches/0001-Report-touch-down-on-one-finger-entry.patch a produit une erreur de sortie de type 1
dpkg-buildpackage: erreur: dpkg-source -i -I -b utouch-grail-1.0.16 a produit une erreur de sortie de type 2
debuild: fatal error at line 1337:
dpkg-buildpackage -rfakeroot -D -us -uc -i -I failed
bzr: ERROR: The build failed.

-> So debian/patches/0001-Report-touch-down-on-one-finger-entry.patch
doesn't apply, I think you included it to 1.0.16 from the source. Once
removed, it builds fine on both natty and maverick. Just a confirmation
is needed before I sponsor to -proposed.

-- 
Tap is sometimes not registered on touchscreens
https://bugs.launchpad.net/bugs/667802
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Status in uTouch-grail: Fix Released
Status in “utouch-grail” package in Ubuntu: Triaged
Status in “utouch-grail” source package in Maverick: Triaged

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.