I also still have it in Xubuntu 14.04.5 LTS with nvidia-355 drivers. I
checked the sources of the current xorg-server package and the fix isn't
adopted in them. Perhaps we could push somehow for it?
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[nvidia-prime]Freeze while using touchpad
Status in X.Org X server:
Status in xorg-server package in Ubuntu:
Status in xorg-server source package in Trusty:
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:
The following upstream report has a patch that addresses this issue:
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