Existing users, 
APC Powerchute
for the uninterruptable power supplies (UPS)
Version: 1.3.4
10.5.1 won't sleep wit UPS connected via USB
Feedback Type: Troubleshooting Report
Contributed by: mspam Friday, December 28 2007 @ 07:36 AM PST
Product Platform: MacOSX
Used Product For: Over One Year
I have an APC Back-UPS LS 700 connected to a G4/933 via USB. The Mac is running an erase-install of 10.5, updated to 10.5.1. OS X sees the UPS just fine without any special software installed (e.g. PowerChute), and it displays a good power percentage in the menu bar. OS X also recognizes the exact model of my UPS. The problem: if UPS is connected via USB, the Mac will not go into sleep. As soon as everything gets quiet and the monitors go black, it wakes up again - nothing of note in the system.log as to why it woke up. However, if I disconnect the USB cable going to the UPS, the Mac will go to sleep just fine. Anyone else see this? Any ideas how to fix it?
System Info:
10.5.1 won't sleep wit UPS connected via USB - djf456
Neither will my MacPro (early 2008) sleep under 10.5.5 using only Apple's UPS monitoring software IF the USB cable is plugged in. I think this is an Apple OS problem.Reply to This
Thursday, November 27 2008 @ 05:08 AM PST