Ubuntu – Click and Drag from touchpad stops working

12.04laptopsamsungtouchpadxorg

I've got a Samsung Notebook (NP-QX412-S01AU) with a touchpad / clickpad. I'm running 12.04 Precise. When I first log into my computer, the touchpad behaves exactly as expected and desired. The longer I stay logged in, it slowly degrades. I'll try describe it.

There are 3 ways of "dragging" on this clickpad:

(Physical) click and hold with one finger, and drag around while still holding it down. All with one finger.
(Physical) Click and hold with one finger, then with another finger drag around to move cursor.
Double tap (not a physical click) and on the second tap, hold and drag.

I most naturally use option 1, but here's how it works:

When I first turn on, options 1, 2 and 3 all work.
After a while, only options 2 and 3 work.
Later still, only option 3 works.
Restarting X causes all 3 to work again.

I've compared the output of "synclient" in each of the states, and there was no difference. Anybody know what to look at?

Or at the very least, a command I can run to "restart" the mouse driver without restarting X?

Best Answer

From the terminal (Ctrl+Alt+t), run the following command:

sudo modprobe -r psmouse && sudo modprobe psmouse proto=imps

Synaptic touchpad on laptop not working

Related Solutions

Ubuntu – Help with synclient configuration on an Elantech touchpad

Try looking into touchegg and if it is supported by your hardware. (I think configuring mouse using this technique is easier but review my other answer first)

Also look at these options in this link http://manpages.ubuntu.com/manpages/oneiric/en/man4/synaptics.4.html

its been a while I've done this, but if you set this option to 3, I think it will change the two finger click to middle. (3)

Option "TapButton2" "integer"
          Which  mouse  button is reported on a non-corner two-finger tap.
          Set to 0 to disable. Property: "Synaptics Tap Action"

This should take care of your right click I believe. (2)

Option "ClickFinger2" "integer"
              Which mouse button  is  reported  when  left-clicking  with  two
              fingers.   Set  to  0  to  disable.  Property:  "Synaptics Click
              Action"

the click and drag I believe has to do with palm detect and few other things. (1)

Section "InputClass"
Identifier "touchpad catchall"
MatchProduct "SynPS/2 Synaptics TouchPad"
MatchIsTouchpad "on"
Driver "synaptics"
Option "JumpyCursorThreshold" "200"
Option "EmulateTwoFingerMinZ" "20"
Option "EmulateTwoFingerMinW" "5"
Option "TapButton2" "3"
Option "PalmDetect" "1"
Option "PalmMinWidth" "20"
Option "LockedDrags" "1"
Option "AccelFactor" ".01"
Option "MaxSpeed" "1.0"
Option "RBCornerButton" "3" 
EndSection

best of lucks

Ubuntu – Where are settings for drag-and-drop touchpad behavior

Check the output of synclient -l | grep -i drag. You'll see something like this:

LockedDrags             = 0
LockedDragTimeout       = 5000
TapAndDragGesture       = 1

I think LockedDragTimeout is the setting you want. To change it temporarily, run synclient LockedDragTimeout=value. Once you are happy with the value, add the command to startup applications.

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