Today I ran some unscientific tests on a net4521 to see how what power savings I could achieve by switching the on-board PCI devices from D0 to D3 state. Switching the two ethernets to D3 state seemed to reduce the total current drawn (measured at the wall plug) by about 36%. If you run a Soekris from battery and/or solar power, this may be a useful savings, easily achieved.
I did the experiments using NetBSD. My instrumentation and methodology is not very sophisticated: I plugged the PoE injector into a Kill-A-Watt. BTW, I suspect that my PoE injector is very inefficient. Dave -- David Young OJC Technologies [email protected] Urbana, IL * (217) 278-3933 _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
