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Old 04-20-2012, 06:32 PM
Adrian Fita
 
Default problem with touchpad after upgrade

On 20/04/12 15:51, David Zelinsky wrote:

I recently did an extensive dist-upgrade in testing, and now my
synaptics touchpad is not registering two-finger scrolling or edge
scrolling reliably. It behaves like a sticky mouse: when I try to
scroll often nothing happens, but if I keep doing it eventually it will
start to work, sort of, but in very jerky unworkable fashion.

As far as I can see the upgrade did not affect any synaptics-related
package, but I could be missing something.

Any suggestions?

This is the second time an upgrade messed up two-finger behavior on my
touchpad. The last time I fixed it by messing with some settings in
synclient, but nothing seems to help this time.


If it's any consolation, I'm also experiencing this exact same issue on
a HP PowerBook 4515s. And it started occuring after upgrading
xserver-xorg-input-synaptics to version 1.5.99.901-1 or 1.5.99.902-1
(I'm not exactly certain which version).


In my case the pointer also jumps around to the upper-left corner of the
screen or to the top of the screen and it gets "stuck" there, I'm unable
to move it. I can unstuck the pointer by right clicking.


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Old 04-20-2012, 06:46 PM
Adrian Fita
 
Default problem with touchpad after upgrade

On 20/04/12 21:32, Adrian Fita wrote:

On 20/04/12 15:51, David Zelinsky wrote:
> [...]


Oh, I just stumbled upon the bugreport regarding this in the
xserver-xorg-input-synaptics package.


Check it out for workaround sugestions and temporary solutions:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=665004 .

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Old 04-20-2012, 06:58 PM
ael
 
Default problem with touchpad after upgrade

On Fri, Apr 20, 2012 at 08:51:34AM -0400, David Zelinsky wrote:
> I recently did an extensive dist-upgrade in testing, and now my
> synaptics touchpad is not registering two-finger scrolling or edge
> scrolling reliably. It behaves like a sticky mouse: when I try to
> scroll often nothing happens, but if I keep doing it eventually it will
> start to work, sort of, but in very jerky unworkable fashion.
>

This is a bug which has been outstanding for a long time in debian :-(
See
665004@bugs.debian.org
and also note
https://bugs.freedesktop.org/show_bug.cgi?id=39949
643693@bugs.debian.org
629243@bugs.debian.org

There seems to be rather poor support for synaptics touchpads ATM.
Perhaps no developer has one...

ael


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Old 04-20-2012, 10:34 PM
David Zelinsky
 
Default problem with touchpad after upgrade

ael <law_ence.dev@ntlworld.com> writes:

> On Fri, Apr 20, 2012 at 08:51:34AM -0400, David Zelinsky wrote:
>> I recently did an extensive dist-upgrade in testing, and now my
>> synaptics touchpad is not registering two-finger scrolling or edge
>> scrolling reliably.
[snip]
>
> This is a bug which has been outstanding for a long time in debian :-(
> See
> 665004@bugs.debian.org
[snip]


Thanks ael and Andrian, this is definitely the bug I'm seeing. I
followed the suggestion of setting {Vert,Horiz}ScrollDelta=5 and
{Vert,Horiz}Hysteresis=0, and that does make it useable, though as noted
in the bug report, it's not as smooth as it should be. I may try
downgrading the xorg-xserver-input-synaptics package, which is supposed
to fix the problem.

-David


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