Macbook touchpad cursor moving "in steps"

Hi,

I already accidently posted a similar post in the Apple Intel Archive (I was directly linked to it and didn't realize it was an archive... sorry for that) and was suggested to search this forum, as a few people had similar issues. I couldn't find anything useful and so I thought it's a good idea to post it once again here :)

If I try to configure my touchpad behaviour I always notice the following no matter what I change: The cursor in mac os smoothly moves in a straigt line from one edge to the other if I drag my finger diagonally... In ubuntu, the cursor first moves right, then down, then right, then down, like drawing small steps... it's really annoying and makes navigation in a menu quite a task...

Here are some pictures to clarify: ;)

mac os cursor movement:

Code:

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ubuntu cursor movement:

Code:

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I don't know if this is a driver or configuration issue... I used (and tried to tweak) the configuration from this link: https://help.ubuntu.com/community/Ma...ae7d325138b8cb

Anyone knows how to solve this? Or, as an alternative, anyone with a santa rosa c2d macbook (macbook3,1) who doesn't have this problem willing to post his/her xorg.conf?

cu,
peter

Hm, I am using this one on my MBP Santa Rosa (I think the touchpad is equal to those in the Macbooks):

Code:

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Section "InputDevice"
        Identifier "Synaptics Touchpad"
        Driver "synaptics"
        Option                "SendCoreEvents"        "true"
        Option "Device" "/dev/input/touchpad"
        Option "Protocol" "auto-dev"
        Option "VertScrollDelta" "20"
        Option "HorizScrollDelta" "350"
        Option "VertTwoFingerScroll" "true"
        Option "HorizTwoFingerScroll" "true"
        Option "FastTaps" "false"
        Option "TapButton2" "3"
        Option "AccelFactor" "0.3"
        Option "SHMConfig"  "on"
EndSection

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Hope this helps...

Hi,

I'll try this tomorrow and see if it works, although I'm quite sceptical as it is similar to my config...

cu,
peter

Well, unfortunately, the cursor movement still is like that...

nobody else? At least confirmations of this problem?

Quote:

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Originally Posted by attenpeter

nobody else? At least confirmations of this problem?

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search in the forum archive as I am sure that someone has reported something similar before. It seems that adjusting values in the xorg.conf tends to fix it though.

hi there,

I have a macbook3,1 and Im experiencing the exact same problem as attenpeter.

Tore

Quote:

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Originally Posted by cyberdork33

search in the forum archive as I am sure that someone has reported something similar before. It seems that adjusting values in the xorg.conf tends to fix it though.

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I'm sorry, I searched a lot (here and google), tried A LOT of parameter tuning... The problem still exists :(

My guess is that it is a macbook3,1 issue as other macbooks don't seem to be affected...

I don't know, just a wild guess (I'm quite desperate), but the XNU kernel (mac os X kernel) is said to be open source; wouldn't it be possible to understand how the touchpad driver there works and implement/port it to a linux kernel? Or does apple use "binary driver modules" that prevent that?
That is, IF this is a driver issue.....

I have also done quite a lot of synaptics tweaking with no solution. I am no synaptics guru, but I am feeling more and more confident that the problem might lay with the appletouch driver somehow. I have tried tweaking some params in that driver without really knowing too much about what I am doing, and with no results. It may be a problem with the way the driver calculates the current position.

Same problem here. Did anyone manage to fix it? Did you find values that work well in xorg.conf?

Thanks,
Tiago