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Binary package hint: yelp

I disabled the touchpad on my Dell Latitude E6400 through the System >
Preferences > Mouse > Touchpad option under Ubuntu Jaunty.  After some
period of time, say 5-10 minutes, it becomes live again on its own. When
this happens, the touchpad tab disappears from the System > Preferences
> Mouse options window.  This has been happening for at least a month,
perhaps since I loaded Ubuntu (I loaded 8.10 in March and upgraded to
9.04 in April).  I have kernel 2.6.28-14-generic and Gnome 2.26.1.

The problem does not occur if I have a USB mouse plugged in.
The problem stops (temporarily) if I shut down and restart the laptop.

Today for the first time, upon observing the problem, I tried typing
gsynaptics in a terminal window. I received a message that SHMConfig
needed to be set to true.  I found a suggested addition to the
/etc/X11/xorg.conf file and added it:

Section "InputDevice"
        Identifier      "Synaptics Touchpad"
        Driver          "synaptics"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/psaux"
        Option          "Protocol"              "auto-dev"
        Option          "SHMConfig"             "on"
        Option          "HorizScrollDelta"      "0"
EndSection

After adding this and rebooting, I was able to run gsynaptics, which
showed the touchpad deactivated.  Later, when the touchpad reactivated
itself, I tried gsynaptics again, and received the message about needing
to set SHMConfig to 'true'.

I have a second problem that is perhaps related.  Sometimes the left
touchpad button fails to result in any action when it ought to, for
example for a menu choice.  Often the button functionality returns afte
5-10 seconds.  Sometimes I have to shut down the laptop with the power
button and then restart to remove the problem.  This problem I occurs
also with the USB mouse, however, so I am not sure that it is related.

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/yelp
NonfreeKernelModules: wl
Package: yelp 2.25.1-0ubuntu5
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: yelp
Uname: Linux 2.6.28-14-generic i686

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 needs-reassignment
-- 
Touchpad re-enabled and SHMConfig reset to false
https://bugs.edge.launchpad.net/bugs/411139
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