mactel-support team mailing list archive

[Blaine <381884@xxxxxxxxxxxxxxxxxx>]

Sorry, nothing has changed.  I think we'd need someone with more experience
with weighting touchpad sensor values.  The current algorithm just isn't
working right.  Either this is only a very specific problem to only a few
hardware configurations OR I'm just so used to smooth apple trackpad in OS X
that I'm spoiled...

Blaine


On Thu, Jul 15, 2010 at 1:47 PM, jack fleming <381884@xxxxxxxxxxxxxxxxxx>wrote:

> I just installed Lucid on my macbook 4,1 and have this issue with 2
> finger scrolling. To annoying to use it with this bug, a real shame
> since everything else works as expected.
>
> Is there any status updates on a fix. I am willing to test things if
> needed.
>
> Jack
>
> --
> Appletouch touchpad driver produces jumpy two-fingered scrolling
> https://bugs.launchpad.net/bugs/381884
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in The Linux Kernel: New
> Status in Mactel Support: New
> Status in “xserver-xorg-input-synaptics” package in Ubuntu: Confirmed
>
> Bug description:
> Binary package hint: xserver-xorg-input-synaptics
>
> My system is: Linux richard-laptop 2.6.28-11-generic #42-Ubuntu SMP Fri Apr
> 17 01:58:03 UTC 2009 x86_64 GNU/Linux.  However, this issue applies to at
> least Intrepid and Jaunty, 32 and 64 bit, running on Apple Mac hardware that
> uses an Appletouch touchpad.  It has also been reported in the Gentoo and
> Debian forums.
>
> >From what I can find on the Net, the Appletouch touchpad was first used in
> February 2005 for the G4 aluminium PowerBook, and last used for the Macbook
> Pro in its 3rd generation, then 4th generation Intel Macbook in early 2008.
>
> The issue is with two-fingered scrolling.  The Appletouch features the
> ability to detect two (or three) touches.  OS X uses this feature to enable
> scrolling, similar to a scrollwheel on a mouse.
>
> The synaptics driver causes the simulated scrollwheel to start moving as
> soon as one places a second finger on the touchpad.  That is to say, placing
> a second finger causes the trackpad driver to deliver scrolling signals,
> which means that attempts at vertical scrolling feels jumpy, or over
> sensitive.
>
> There was an update to the OS X driver that fixed this situation for Apple.
>  I guess that it detects the second finger and programmatically ignores the
> first few scrollticks, thereby 'deadening' the output.  This is what we
> need.
>
> The synaptics driver allows for some modification, but not for multitouch
> input.  This needs to be fixed at source code level.
>
> Richard
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/linux/+bug/381884/+subscribe
>

-- 
Appletouch touchpad driver produces jumpy two-fingered scrolling
https://bugs.launchpad.net/bugs/381884
You received this bug notification because you are a member of Mactel
Support, which is a direct subscriber.

Status in The Linux Kernel: New
Status in Mactel Support: New
Status in “xserver-xorg-input-synaptics” package in Ubuntu: Confirmed

Bug description:
Binary package hint: xserver-xorg-input-synaptics

My system is: Linux richard-laptop 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/Linux.  However, this issue applies to at least Intrepid and Jaunty, 32 and 64 bit, running on Apple Mac hardware that uses an Appletouch touchpad.  It has also been reported in the Gentoo and Debian forums.

>From what I can find on the Net, the Appletouch touchpad was first used in February 2005 for the G4 aluminium PowerBook, and last used for the Macbook Pro in its 3rd generation, then 4th generation Intel Macbook in early 2008.

The issue is with two-fingered scrolling.  The Appletouch features the ability to detect two (or three) touches.  OS X uses this feature to enable scrolling, similar to a scrollwheel on a mouse.

The synaptics driver causes the simulated scrollwheel to start moving as soon as one places a second finger on the touchpad.  That is to say, placing a second finger causes the trackpad driver to deliver scrolling signals, which means that attempts at vertical scrolling feels jumpy, or over sensitive.

There was an update to the OS X driver that fixed this situation for Apple.  I guess that it detects the second finger and programmatically ignores the first few scrollticks, thereby 'deadening' the output.  This is what we need.

The synaptics driver allows for some modification, but not for multitouch input.  This needs to be fixed at source code level.

Richard