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[Bug 1220426] Re: [nvidia-prime]Freeze while using touchpad

 

The scroll problems seem to be related to the 'idle time' support of
syndaemon that disables the touchpad briefly after typing. If I hit
'enter' to free up scrolling, then disable that feature entirely (via
the kde touchpad config, which I assume is restarting the daemon with
new settings), all of the scrolling issues go away. However, if
scrolling isn't working when I disable that feature, then scrolling
never unlocks. So definitely seems like the timer associated with that
interval is never completing.

Although, strangely, when I do disable the interval (via the kde
touchpad config), the typing still causes scrolling to be temporarily
disabled...

Will dig a little deeper. But in the meantime, the xorg patch +
disabling syndaemon typing intervals is the winning combo.

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https://bugs.launchpad.net/bugs/1220426

Title:
  [nvidia-prime]Freeze while using touchpad

Status in X.Org X server:
  Confirmed
Status in “nvidia-graphics-drivers-319” package in Ubuntu:
  Invalid
Status in “nvidia-graphics-drivers-331” package in Ubuntu:
  Invalid
Status in “nvidia-graphics-drivers-343” package in Ubuntu:
  Invalid
Status in “nvidia-prime” package in Ubuntu:
  Invalid

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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