Comment 4 for bug 872885

I'm not convinced that this is a duplicate of " Bug #868400: Synaptics touchpad stops working - two syndaemon instances running." since I do not have two instances running that I can find (ps -ef doesn't show 2). Things I have noticed, though:

- I don't know that it's 100%, but it's much more frequent when "Disable mouse when typing" is set. This is my usual setting on boot since I use a USB mouse most of the time specifically because of this problem.

- It acts as if the touchpad is "locked" into some gesture state. In particular, when the mouse won't move, instead a one finger gesture on the touchpad results in TWO-finger vertical scrolling. I.e., as if it thought it was still in two finger mode when I'm only using one finger. (Was state saved/not cleared when the touchpad was enabled/disabled?) I've had other cases where some motion seemed to "reset" it to a known good and working state, but not reliably. But it looks like a state-holdover somewhere to me.

- The touchpad isn't "off" -- it is clearly responding and scrolling -- although it should be interpreting a single finger gesture to move the mouse, not to scroll as it is doing.

- I'm not positive about this, but I think I even had "enable mouse clicks by touchpad" set one time, and when in the bad state, it would not respond to mouseclicks either.

This is Ubuntu Desktop 32-bit, 12.04 and up to date as of 02/18/2013, on Asus 1215N netbook. The only odd thing about the install is this is the Nvidia Optimus graphics, so I have both Jupiter and Bumblebee installed, but only to disable the fast graphics Nvidia card (using Intel only) to save on battery and heat.

Settings are:
- Disable touchpad while typing
- Enable 2 finger (vertical) scrolling
- Speeds set all the way to left (slow)