TOPIC
When the Power Mac G4 (AGP Graphics) enters sleep mode with a single channel PCI SCSI card installed, the computer may incorrectly assume the card supports PCI power down mode and not wake properly from sleep.
DISCUSSION Note: This issue is resolved with Mac OS 9. When the computer goes to sleep, as a function of Power Manager 2.0, power to the PCI bus and the system fan are turned off to conserve energy. The PCI power should only be turned off if all installed PCI cards support this mode, a component of Power Manager 2.0. If the PCI card does not support this mode, the computer should not enter this state. In this case, the card does not support Power Manager 2.0, but the card allows PCI power down and is then unable to awake from sleep correctly. Installing Mac OS 9 will resolve this issue, allowing the computer to go to sleep, without PCI power down and wake up properly. Another workaround is to disable system sleep in the Energy Saver control panel. Note: This issue can affect only the AGP version of the Power Mac G4 with an Apple or third party single channel SCSI card installed. |
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| Document Information | |
| Product Area: | Power Mac G4 |
| Category: | Power Mac G4 Hardware |
| Sub Category: | Troubleshooting |
| Keywords: | kpmg4 |
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