Howto Linux Asus U35JC hybrid graphics

Linux Hybrid Graphics: Using acpi_call module to switch on/off discrete graphics card in Linux

Asus U35JC-RX005X with ubuntu lucid lynx:
echo '\_SB.PCI0.PEG1.GFX0._OFF' > /proc/acpi/call

The battery using rate decrease from 4200mW :

echo '\_SB.PCI0.PEG1.GFX0._ON' > /proc/acpi/call
grep rate /proc/acpi/battery/BAT0/state
present rate: 17808 mW
echo '\_SB.PCI0.PEG1.GFX0._OFF' > /proc/acpi/call
grep rate /proc/acpi/battery/BAT0/state
present rate: 13664 mW

Everything else worked fine under Ubuntu for this computer.