Troubleshooting Mac OS X 10.2.4: Resetting NVRAM for sleep problems

Resetting NVRAM for sleep problems Several readers have successfully solved sleep issues that were introduced with the Mac OS X 10.2.4 update (generally inability to fall into or wake up from sleep) by resetting the NVRAM. In order to reset your NVRAM, restart your computer holding down the keys: command, option, o, and f in order to enter Open Firmware mode; and hold these keys until the command prompt comes up. Then type:

• reset-nvram
• reset-all

MacFixIt reader Chris Scherer offers a case example of Mac OS X 10.2.4 sleep problems:

"After the Mac OS X 10.2.4 combination update I was unable to send my G4 (AGP / 400 MHz / 1Gb RAM) with a Firewire/USB 2.0 combo PCI card, to sleep mode. If I tried to, the screen went blank, the HD or the fan spun down, but I still had either the disks or the fan running. And I also was unable to wake the machine up, by pressing any button. So I reverted to 10.2.3 and the problem was gone."

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