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[Chucky <1220426@xxxxxxxxxxxxxxxxxx>]

Note: Bug is still alive in october 2015 - that is nearly 25 months old
!

== My config
Fully up to date 14.04. 
Nvidia GTX 950M + Integrated Intel
Asus ROG G551J
Elantech Touchpad

== Elantech Touchpad, the common hardware
After seeking on the net, I've find (here: https://devtalk.nvidia.com/default/topic/766166/elantech-touchpad-related-nvidia-driver-freeze/) that many people who experience the bug have an Elantech Touchpad and are using the synaptics drivers.

To check if you're in the same situation:
$ cat /sys/class/input/mouse0/device/name
->> ETPS/2 Elantech Touchpad

== Proposed workaround

It seems that the following workaround works, although I can't promise
anything. We are however all expecting that NVidia developers fix their
drivers properly.

    $ sudo apt-get remove xserver-xorg-input-synaptics-{your-flavour}
    $ sudo apt-get install xserver-xorg-input-mtrack-{your-flavour}

Hope you're doing better with that solution ;-)

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1220426

Title:
  [nvidia-prime]Freeze while using touchpad

Status in X.Org X server:
  Fix Released
Status in xorg-server package in Ubuntu:
  Fix Released
Status in xorg-server source package in Trusty:
  Triaged

Bug description:
  Using Asus N43SL laptop as an example, with nvidia-prime installed, so
  the dedicated NVIDIA graphics card (GT 540m) is in use, once in a
  while, my screen will freeze when I use my touchpad.

  WORKAROUND: Use USB mouse.

  WORKAROUND: Uninstall nvidia-prime and use integrated graphics.

  WORKAROUND: Do a VT switch via Ctrl+Alt+F1 then Ctrl+Alt+F7.

  In the attached Xorg.0.log, you can see "synaptics: ETPS/2 Elantech Touchpad: touchpad found" each time I did a VT switch and regained control:
  https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1220426/+attachment/3801516/+files/Xorg.0.log

  The following upstream report has a patch that addresses this issue:
  https://bugs.freedesktop.org/show_bug.cgi?id=86288

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