[vdr] Unreliable shutdown

This is not strictly a vdr problem, but was wondering if others have seen it and have suggestions for a solution.

I have an Intel Atom/Fedora based system running the latest vdr and about 20% of the time when either the "Power OFF" remote command is issued or the shutdown command (shutdown -h now), is run, the box will go into a sleep/standby mode, rather than a complete power down.

When it does this, the box will not wake up for the next programmed timer, nor from pushing the power button. A complete power down is required to restore operation.

The same thing happens on my Core2 Quad/Centos desktop machine, except that sleep occurs about 60% of the time.

Is there a better shutdown command to guarantee full power down?

Regards,

Richard