All works properly except from the "NVIDIA OPTIMUS TECHNOLOGY" and "Leds on screen of CAPS LOCK, NUM LOCK and SCROLL LOCK"
1) NVIDIA OPTIMUS TECHNOLOGY
2) Leds on screen of CAPS LOCK, NUM LOCK and SCROLL LOCK
This laptop works fine but it has a problem with the "NVIDIA OPTIMUS" technology. I had to install "bumblebee" to use my GEFORCE GT540M.
I had to install gkrellm and gkrellm-leds because this laptop hasn't got any led to see if CAPS LOCK, NUM LOCK and SCROLL LOCK are activated.