Turning off graphics card

Til Schubbe lists at lists.schubbe.org
Fri Apr 2 23:12:26 PDT 2010


my computer is running 24/7. Normally there's nothing difficult to
do for the graphics card so the built-in motherboard-graphics card
is sufficient.

Sometimes I need some more graphics-power. In that case I'd like to
turn on the PCIe graphics card, run a 2nd x-server on it and some
power-consuming app (game) on that 2nd x-server. Finished with that
app I want to stop the 2nd x-server and turn off the PCIe graphics
card again.

Running the PCIe graphics card (e.g. Radeon 4670) all the time
would be a waste of energy and would make the fans run quicker and

Can I turn off (and on) a PCIe graphics card while the computer is

If that's the wrong place to ask this, please point me to the
right direction (perhaps the kernel-ML?).


PS: The computer is running Debian Lenny.

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