4-finger drag also registers 3-finger tap simultaneously

I can confirm the behavior on a magic trackpad. I believe the issue is the touch configuration stabilization timeout. This timeout is for a reasonable length of time allowed between touches becoming active. Without this timeout, one would have to touch all four fingers at the exact same time or else other gestures may fire.

We need to look into increasing this timeout value.

Henrik has added a few lines of code to ensure the "glue" timeout is enforced between for touch gestures too. I added a patch to the package in natty and uploaded it (version 1.0.20-0ubuntu4~utouch1) to ppa:utouch-team/unstable. Please test out the package once it has been built and published to see if it fixes the issue for you.

It works perfectly.

I made sure I could reproduce the original issue before upgrading. I
again got about 10 out of 200 4-finger drags incorrectly registered as
3-finger events. I updated to the 1.0.20-0ubuntu4~utouch1 from the ppa
and ran the same test: 0 errors out of 573 4-finger events registered.
And unity toggles the dash on 4-finger tap and toggles the launcher on
4-finger left/right drag every time.

Thanks!

On Mon, Apr 4, 2011 at 20:45, Chase Douglas <email address hidden> wrote:
> Henrik has added a few lines of code to ensure the "glue" timeout is
> enforced between for touch gestures too. I added a patch to the package
> in natty and uploaded it (version 1.0.20-0ubuntu4~utouch1) to ppa
> :utouch-team/unstable. Please test out the package once it has been
> built and published to see if it fixes the issue for you.
>
> ** Changed in: utouch-grail
>       Status: Triaged => In Progress
>
> ** Changed in: utouch-grail (Ubuntu)
>       Status: Triaged => In Progress
>
> ** Changed in: utouch-grail
>     Assignee: (unassigned) => Henrik Rydberg (rydberg)
>
> --
> You received this bug notification because you are a direct subscriber
> of the bug.
> https://bugs.launchpad.net/bugs/748282
>
> Title:
>  4-finger drag also registers 3-finger tap simultaneously
>
> Status in uTouch-grail:
>  In Progress
> Status in “utouch-grail” package in Ubuntu:
>  In Progress
>
> Bug description:
>  Binary package hint: unity
>
>  Test case was: Using a 4-finger drag (to the right) to display the
>  launcher (if hidden).
>
>  http://testcases.qa.ubuntu.com/Applications/Unity/Touch/LauncherRevealed
>
>  The test case passes, however, if there is a window under the current
>  mouse position, then that window is set into "Initiation" mode as a
>  side effect of the 4-finger drag. The reason is that a 3-finger event
>  is also being registered. To measure this, I then did:
>
>   geistest | grep touch= | sort | uniq -c
>
>  And then performed exclusively 4-finger drags for several seconds in different directions. The results:
>
>      11        attr "gesture name" = "Touch,touch=3"
>      210       attr "gesture name" = "Touch,touch=4"
>
>  This suggests that the hardware may be overly sensitive
>  (MacBookPro6.2). At this point it's not clear if this should be a
>  called a bug in the touchpad driver or if unity is responsible for
>  compensating for sensitive touchpads.
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 11.04
>  Package: unity 3.8.2-0ubuntu1
>  ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
>  Uname: Linux 2.6.38-7-generic x86_64
>  NonfreeKernelModules: nvidia wl
>  Architecture: amd64
>  CompizPlugins: [core,bailer,detection,composite,opengl,decor,vpswitch,compiztoolbox,regex,snap,imgpng,unitymtgrabhandles,resize,gnomecompat,animation,grid,place,mousepoll,move,expo,wall,workarounds,session,ezoom,staticswitcher,fade,scale,unityshell]
>  Date: Sat Apr  2 15:19:31 2011
>  DistroCodename: natty
>  DistroVariant: ubuntu
>  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64+mac (20110329.1)
>  InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64+mac (20110329.1)
>  InstallationMedia__: Ubuntu 11.04 "Natty Narw...

573 events! Nice, Chad -- thanks for taking the time to test so thoroughly!!!

And kudos to Henrik for the fix that performed so well during all of those tests :-)

This bug was fixed in the package utouch-grail - 1.0.20-0ubuntu4

---------------
utouch-grail (1.0.20-0ubuntu4) natty; urgency=low

  * Add glue timeout to touch gestures too (LP: #748282)
 -- Chase Douglas <email address hidden> Wed, 20 Apr 2011 10:00:16 -0400