From: "Ric Moore" <wayward4now@xxxxxxxxx>
On Thu, 2006-09-07 at 17:41 -0700, jdow wrote:
There may be some problems if there is a USB based UPS involved. Check
with the apcupsd mailing list archives for more information. One thing
I noticed here in one install recently was that the USB bus terminated
before the "apcupsd --killpower" command got executed. Of course, This
Will Never Do.
Just how does that work? How does the computer know it's attached to a
UPS? I have an older motorcycle-sized battery backup UPS and there is
just 3 plugs for UPS and 3 for filtered supply voltage. There are two
filtered phone jacks, as well. Can this be monitored?? It's a Tripp
Lite. Ric
If you are communicating via USB to the USB equipped UPS then, trust me
on this one, your machine KNOWS it is communicating via USB. If you are
using a USB serial dongle to talk to that UPS then your machine does
NOT know. So you may have to go through the ordering on shutdown and
try to create a useful race condition on exit. (Some UPSs thoughtfully
provide a timeout before they power off after receiving the power
off command, if they even pay attention to such a command.)
Of course, some computers (Dell's apparently) are now hard wired so that
on power up from a power loss they restore to the condition they were
in before the power went away. If you want automatic restart on power
restore.... This becomes a REAL RTFMM situation. (Multiple Manuals)
Then you get to figure out how to implement what you want. It has been
known to make grown men cry.
{^_^}
