I have had an odd problem with my powerbook in the past few weeks. On wake from sleep the machine will not wake fully and it would keep the screen off. Sometimes it enters a seemingly forced shutdown mode when operating normally, like writing a document.
I spent a few weeks battling on and off with this, being careful to save documents regularily. I had thought it was related to usb storage devices, but then it happened when I had not been using one.
Finally I hunted in the Console, looking at the system.log file /private/var/log/system.log in 10.2.x, available from the Console application in 10.3.x. I found the line below recurring several times. New console application in Panther is much improved.
Jan 14 08:59:24 localhost kernal: ApplePMU::PMU FORCED SHUTDOWN, CAUSE = -96
So I realised that the power management unit might be acting up. A quick hunt on www.info.apple.com turned up the right document. Resetting iBook and PowerBook PMU.
I've also turned off screen saver and turned off requiring password on wake from sleep or screensaver and I think that has solved it.
Essentially, if you machine is acting weirdly on wake from sleep or shutting down erractically then reset the PMU.
i'm having the same problem. i suspect it has something to do with a cf card reader i leave installed in my pcmcia slot. everytime the problem occurs, i check the console log messages and see the folloing string:
Oct 15 10:34:29 localhost syslogd: restart
Oct 15 10:34:29 localhost syslogd: kernel boot file is /mach_kernel
Oct 15 10:34:29 localhost kernel: standard timeslicing quantum is 10000 us
Oct 15 10:34:29 localhost kernel: vm_page_bootstrap: 125397 free pages
Oct 15 10:34:29 localhost kernel: mig_table_max_displ = 68
Oct 15 10:34:29 localhost kernel: IOKit Component Version 7.5:
Oct 15 10:34:29 localhost kernel: Thu Aug 5 19:23:49 PDT 2004; root(rcbuilder):RELEASE_PPC/iokit/RELEASE
Oct 15 10:34:29 localhost kernel: 92 prelinked modules
Oct 15 10:34:29 localhost kernel: Copyright (c) 1982, 1986, 1989, 1991, 1993
Oct 15 10:34:29 localhost kernel: The Regents of the University of California. All rights reserved.
Oct 15 10:34:29 localhost kernel:
Oct 15 10:34:29 localhost kernel: using 1310 buffer headers and 1310 cluster IO buffer headers
Oct 15 10:34:29 localhost kernel: IOPCCard info: Mac OS X PCMCIA Card Services 3.1.22
Oct 15 10:34:29 localhost kernel: IOPCCard info: options: [pci] [cardbus] [pnp]
Oct 15 10:34:29 localhost kernel: IOPCCard info: Intel PCIC probe:
Oct 15 10:34:29 localhost kernel: IOPCCard info: TI 1510 rev 00 PCI-to-CardBus phys mem 0xa0004000 virt mem 0x1f70c000
Oct 15 10:34:29 localhost kernel: IOPCCard info: host opts [0]: [pci only] [pci irq 255] [lat 16/32] [bus 1/1]
Oct 15 10:34:29 localhost kernel: IOPCCard info: PCI card interrupts, PCI status changes
Oct 15 10:34:29 localhost kernel: ApplePMU::PMU FORCED SHUTDOWN, CAUSE = -96
i've also read that firewire or usb devices which draw constant power may cause the PMU to shut the machine down.
the OTHER suspected cause, either independent of or in conjunction with the peripheral power drain, is related to a problem with my power adapter. for the past few weeks it seems the adapter can't make a good connection with the outlet, and intermittantly connects/disconnects, which could really mess up the pmu and/or power supply.
any thoughts?
Jan 10 15:18:47 localhost kernel: The Regents of the University of California. All rights reserved.
Jan 10 15:18:47 localhost kernel:
Jan 10 15:18:47 localhost kernel: using 3932 buffer headers and 3932 cluster IO buffer headers
Jan 10 15:18:47 localhost kernel: DART enabled
Jan 10 15:18:47 localhost kernel: ApplePMU::PMU FORCED SHUTDOWN, CAUSE = -122
Jan 10 15:18:47 localhost kernel: Local FireWire GUID = 0xa95ff:0xfec42124
Jan 10 15:18:47 localhost kernel: USBF: 23.955 AppleUSBHubPort: Error 0xe00002ed: set feature (resetting port)
Jan 10 15:18:47 localhost kernel: USBF: 23.969 AppleUSBHubPort: Error 0xe00002ed: set feature (resetting port)
I HAVE similar problem with my PowerMac G5. It shuts down sometimes. What to do???
Hi all, I have had the same "AppleUSBHubPort: Error 0xe00002ed:" problem and today I will bring back my new PowerMac G5 to the apple store. I had big problems with all my USB ports. Sometomes all ports was gone and I had to reboot my Mac.