[Ubuntu Wiki] Update of "DebuggingTouchpadDetection" by penalvch

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The "DebuggingTouchpadDetection" page has been changed by penalvch:
http://wiki.ubuntu.com/DebuggingTouchpadDetection?action=diff&rev1=40&rev2=41

Comment:
1) RM "HAL" as folks become confused thinking it is a package, and file against hal-info. 2) As per LP#1803821 et al., add note on synaptics to libinput update check.

  
  == In case your Touchpad doesn't work at all (No response from the Touchpad) ==
  
- This is generally a case of a kernel ('''linux''') or '''xorg''' bug. Check by connecting an external mouse to see if that works or not.
+ This is generally a case of a kernel ('''linux''') or '''xorg''' bug.
  
-  1. If no, then you should file the bug against '''HAL''' and follow these steps:
+  1. Check by connecting an external mouse to see if that works. If it does, then one may be affected by the transition from [[https://launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics|xserver-xorg-input-synaptics]] to [[https://launchpad.net/ubuntu/+source/xserver-xorg-input-libinput|libinput]]. Hence, one will want to check by uninstalling xserver-xorg-input-synaptics to see if this resolves the issue. If not, please see below:
    * After reading [[DebuggingTouchpadDetection/evtest|this]] about how to enter VT and log evtest events, switch to a VT using Crtl+Alt+F2 and enter the following in your terminal: {{{
  sudo evtest /dev/input/eventX > ~/evtest}}} where the "X" in "eventX" is the event number found by typing in a terminal: {{{
  cat /proc/bus/input/devices}}}