Ubuntu
nvidia-graphics-drivers package

  1. Bug #877438
  2. Comment #62

Comment 62 for bug 877438

Revision history for this message
Raphaël Badin (rvb) wrote : Re: Unity/compiz has sluggish performance on dual-head with nvidia driver

Same problem with NVIDIA GeForce 8400M GS.
Ubuntu precise is barely usable with laptop monitor + external monitor.
Back to using unity2d.