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[Martin Spacek <launchpad@xxxxxxxxxxxxx>]

I'm seeing something similar, but noticeably different on my Thinkpad
W510 (Quadro FX 880M), Nvidia 331.38, Xubuntu 14.04 amd64. Maybe once a
week, while using the synaptics touchpad in firefox, the entire screen
turns a solid colour, either green or grey. Switcing virtual terminals
doesn't seem to work, nor does closing the lid (doesn't suspend). After
unplugging and plugging my external mouse, the red light on the mouse
doesn't turn back on. So this seems like more of a hard lock. All I can
do is a hard reset.

I was on a more recent nvidia driver until a while ago, from xorg-
edgers, and I don't think I had the problem then, but it's hard to tell
because it's so hard to reproduce. I had to go back to the default
331.38 for Trusty because of an OpenGL corruption problem in one of my
programs.

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

Title:
  [nvidia-prime]Freeze while using touchpad

Status in “nvidia-graphics-drivers-319” package in Ubuntu:
  Triaged
Status in “nvidia-graphics-drivers-331” package in Ubuntu:
  Triaged
Status in “nvidia-graphics-drivers-343” package in Ubuntu:
  Triaged
Status in “nvidia-prime” package in Ubuntu:
  Triaged

Bug description:
  I'm using an Optimus laptop (Asus N43SL)
  nvidia-prime is installed, so my nvidia dedicated graphics card (GT 540m) is in use.

  Once in a while, my screen will freeze, only when I use my touchpad.
  This does not happen with my USB mouse.
  This does not happen either when I uninstall nvidia-prime and use my intel integrated graphics (HD3000).

  I can temporarily solve the issue by doing a VT switch.

  
  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.

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