On Thu, Nov 17, 2005 at 04:17:25PM -0800, Gus Wirth wrote: > At 13:52 11/17/2005 -0800, Lan Barnes wrote: > >My myth-box-to-be is full of silly challenges. When I turn it off (hold > >the on/off down 4 seconds), it doesn't turn on. > > Huh? This confuses me. Do you mean that: > > a) If the computer is turned off by using the power switch that you are > unable to turn it on again with the power switch? > > or
Yes. It runs perfectly. It turns off as expected. It refuses to turn on. > > The switch pair you want is the normally open set. I know which attachment works ... _when_ it works. I haven't figured out how to make it work reliably. > > >I turn power management off in the BIOS. > > > >I had success once when I took the power plug out until the LEDs on the > >eth0 card died out, and then it started on the next push. > > > >I am guessing that the MB has some weird rule about accepting on/off > >signals. > > > >Does anyone have any insight? Allen Bros? > > ATX power supplies use a digital control signal to turn them on/off, unlike > the older AT power supplies where the switch actually turns on/off the AC > power. The ATX power supply also provides a +5VDC standby power output even > when it is in the "off" state. This is what allows the computer to do > things like "wake-on-lan" and "wake-on-ring" because there is always power > applied to the PCI bus for the ethernet card and modem card. This is also > why you need to unplug the computer before you insert or yank out and cards. > > The control signal to the power supply is governed by the motherboard. I'm > not aware of any BIOS settings that would prevent you from turning on the > computer with the power switch. It's possible that you have a bad > motherboard, especially considering that you say it works if you truely > power it off by unplugging it and then reenergizing by plugging it back in. > > It's also possible that your power supply is starting to go bad and doesn't > want to recognize the on/off signal. I have a spare power supply you can > borrow if you want to test this hypothesis. > > Gus > I may take you up on that, perhaps at an installfest. Also, thanks for the informed discourse. I had a hunch it was rigged up something like that. I don't remember the provenance of this box. It may have been a KPLUG raffle prize, and those are always suspect (no offense, but they're donated for a reason ;) But when it _does_ turn on, it's a champ! I will have many happy hours of "Xena Warrior Princess" (or "Duck Dodgers") on this box. 8-) -- Lan Barnes [EMAIL PROTECTED] Linux Guy, SCM Specialist 858-354-0616 -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
