synaptics touchpad pointer jitter

CernelJoson · 2010-12-25 04:28:48

Hi

I've looked all over for a solution to this and I can't seem to find one. I have a ThinkPad R60 and the synaptics touchpad driver. When I rest my finger on the touchpad, without moving, the pointer jitters up and down and side-to-side by a few pixel constantly, as though I were twitching. I've run Windows XP on the same laptop without any problem, so I assume it's something in the driver or default settings.

I've tried changing speed/pressure settings in both GPointingDeviceSettings and in the X config file (/etc/X11/xorg.conf.d/10-synaptics.conf) and nothing seems to do the trick. I'd appreciate it if someone could point me in the right direction because for a relatively minor issue this is rather annoying.

Thanks,

Cernel Joson

nc · 2010-12-25 18:29:08

I also have an Asus N61 with the same problem, even in windows 7. For windows, the solution was not to install the synaptics driver. On linux, the problem started when xorg started to load the synaptics (i guess it started with the xorg1.8), so i guess a solution would be to not to use synaptics with xorg (that way i could use vertical scroll and tapping, which are the only things i'm interested in).

DarksideEE7 · 2011-01-11 21:48:08

I have the exact same problem on my ASUS UL30A-X4. I've been running Arch on this laptop for over a year without problems, but I sent it in for RMA (they replaced the shell) and upon installing Arch again I'm getting the jitter problem, as well as misclick problems.

wankel · 2011-01-19 21:33:53

Im also having the same issue on a dell xps 1645. Setting a very low Minspeed solves the problem, but then of course it makes the mouse feel extremely weird. Anybody find any alternative workarounds?

eldragon · 2011-01-20 13:16:33

check man xorg.conf

particularly the

Option "AccelerationProfile" "integer"

part.

CernelJoson · 2011-01-22 00:44:04

eldragon wrote:

check man xorg.conf
particularly the
Option "AccelerationProfile" "integer"
part.

I looked that up and while it changed the speed of the pointer it didn't seem to affect the jittering.

I ran the synclient monitor and it seems like the pointer corresponds exactly to every slight motion on the touchpad. These are the values I got just from keeping one finger still on the touchpad and this is exactly how the cursor moves. It seems like it should ignore very small motions but it doesn't.

time x y
20.830 3690 3006
20.930 3690 2998
21.030 3688 2997
21.130 3682 3002
21.230 3684 2997
21.330 3680 3005
21.431 3687 2996
21.631 3690 3006
21.731 3684 2993
21.831 3693 3003

Is there some way to make it ignore tiny deltas or otherwise suppress this motion?

wankel · 2011-01-22 04:42:05

CernelJoson wrote:

I looked that up and while it changed the speed of the pointer it didn't seem to affect the jittering.

Same here, changing it affected the acceleration/speed of the cursor but it still jitters

wankel · 2011-02-04 17:06:56

any more ideas?

kolbycrouch · 2011-02-07 01:10:39

Im not really sure what your touchpad looks like but I had the same problem. When you move your finger on the left or right touchpad button, it moves the pointer and this is what causes the jitter and spastic movement when moving windows etc. This seems to be because the buttons are apart of the touchpad. All I did to fix my issue was install xf86-input-synaptics-clickpad from the aur. completely fixed my problem so far.

DarksideEE7 · 2011-02-07 17:53:31

kolbycrouch wrote:

Im not really sure what your touchpad looks like but I had the same problem. When you move your finger on the left or right touchpad button, it moves the pointer and this is what causes the jitter and spastic movement when moving windows etc. This seems to be because the buttons are apart of the touchpad. All I did to fix my issue was install xf86-input-synaptics-clickpad from the aur. completely fixed my problem so far.

I'll give that a shot....my touchpad has a metal bar that pivots to provide a left/right click motion though, like so:
http://i.imgur.com/xT0jC.png

EDIT:

After looking that that package, it looks like it's out of date because it's not needed anymore. Unfortunately I still have the jump cursor :\

Last edited by DarksideEE7 (2011-02-08 03:38:37)

wankel · 2011-02-22 04:12:46

Good news, the issue seems to be fixed with the latest synaptics driver. Also, true two finger scrolling works out of the box

nc · 2011-03-05 17:26:29

Where did you get the latest driver?

wankel · 2011-03-05 18:13:16

http://cgit.freedesktop.org/xorg/driver … synaptics/

1.4 was just released a few days ago

nc · 2011-03-05 20:28:46

Thanks, it's a lot better now. But it still 'jitters' a little

Arch Linux

#1 2010-12-25 04:28:48

synaptics touchpad pointer jitter

#2 2010-12-25 18:29:08

Re: synaptics touchpad pointer jitter

#3 2011-01-11 21:48:08

Re: synaptics touchpad pointer jitter

#4 2011-01-19 21:33:53

Re: synaptics touchpad pointer jitter

#5 2011-01-20 13:16:33

Re: synaptics touchpad pointer jitter

#6 2011-01-22 00:44:04

Re: synaptics touchpad pointer jitter

#7 2011-01-22 04:42:05

Re: synaptics touchpad pointer jitter

#8 2011-02-04 17:06:56

Re: synaptics touchpad pointer jitter

#9 2011-02-07 01:10:39

Re: synaptics touchpad pointer jitter

#10 2011-02-07 17:53:31

Re: synaptics touchpad pointer jitter

#11 2011-02-22 04:12:46

Re: synaptics touchpad pointer jitter

#12 2011-03-05 17:26:29

Re: synaptics touchpad pointer jitter

#13 2011-03-05 18:13:16

Re: synaptics touchpad pointer jitter

#14 2011-03-05 20:28:46

Re: synaptics touchpad pointer jitter

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