Robert Watson writes:
| On Wed, 29 Aug 2001, Garrett Wollman wrote:
| > <<On Wed, 29 Aug 2001 19:58:59 -0700, Mike Smith <[EMAIL PROTECTED]> said:
| > > - I pushed the power button, and my system shut down cleanly!
| >
| > > Yes. ACPI brings some useful new features. 8)
| >
| > FSVO ``useful''. It's a real PITA to have to physically unplug the
| > machine when the kernel is wedged rather than have the power button
| > turn off the power. (The machine in question does not have a reset
| > switch.) As a sometime developer, I may well have a reason to power
| > the system off without performing any kind of shutdown.
|
| Most systems with soft power will perform a hard powerdown if you hold
| down the power button for a sufficiently long period of time (10 - 20
| seconds).
Correct ... and unfortunately it's done in hardware so you can trap it :-(
In some applications you want to make it really hard for someone to be
able to turn it off when a "power off" is not equivalent to "pull the
plug" and the "pull the plug" is safer for the system due to power supply
design.
Doug A.
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