Comment 4 for bug 371574

I did send it to Jason Parekh (jasonparekh at nospam gmail.com) who
was the one who wrote the original code.

I have not sent it to linux-input.

On May 4, 2009, at 17:36, Leann Ogasawara wrote:

> Hi Jeremy,
>
> Thanks so much for the patch. Just curious if you've also submitted
> this upstream for consideration? It's a lot of extra work for the
> Ubuntu kernel team to maintain out of tree patches so as such they
> typically prefer for patches to be accepted upstream first. To submit
> the patch upstream please send it to:
>
> <email address hidden>
>
> Also be sure to CC the maintainer, Johannes Berg at
> <email address hidden> . Thanks.
>
> ** Changed in: linux (Ubuntu)
> Status: New => Incomplete
>
> --
> [PATCH] appletouch reports multiple fingers when only one is pressed
> https://bugs.launchpad.net/bugs/371574
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux” source package in Ubuntu: Incomplete
>
> Bug description:
> Binary package hint: kernel-package
>
> This issue affects atleast jaunty and karmic. The patch is against
> current karmic.
>
> The appletouch driver is prone to reporting multiple fingers when
> only one is
> pressing. The appletouch driver queries an array of pressure
> sensors and
> counts local maxima in pressure to determine the number of fingers.
> It just
> does this on the raw values, so a data stream like:
>
> 0 100 250 300 299 300 250 100 0
>
> actually registers as 2 fingers.
>
> This patch updates the logic to ignore small dips in pressure that
> are less
> than the threshold.