Re: hard crash despite UPS

["Jeffrey L. Taylor" <jeff@austinblues.dyndns.org>]

Quoting Pigeon <jah.pigeon@ukonline.co.uk>:
[snip]
> Messages only go from the UPS to the computer... but the UPS clearly
> receives something FROM the computer, which affects its LED... and
> you're supposed to use XON/XOFF ("software") flow control.
> 
> My guess is that the UPS is using the hardware flow control signals
> (RTS etc) to determine whether or not the computer is switched on;
> Linux initialises these differently from Windoze; and the UPS
> therefore thinks that the computer is not switched on, and doesn't
> bother to provide power when you kill the mains.
> 

Stopping and starting the APC ssd daemon on my SuSE box does cause the
green LED to turn off and on.  (Debian is on a sandbox machine and a
laptop. They don't rate a UPS).

Jeffrey