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10.4: Enable safe sleep on some older Macs
I posted a couple of comments at Andrew's web site (see them under my other alias, "Shocktrooper") regarding Safe Sleep and third-party batteries that I thought might be useful mentioned here, too.
In a nutshell, third-party batteries do not support Sleep mode, so they do not auto-sleep like Apple batteries when they run low; instead, they simply run down and cut out the computer, which means you lose all unsaved data and need to reboot to get up and running again. After activating the Safe Sleep hack, however, I discovered that when my battery ran down and cut out my computer, pressing the power button did not reboot but restored the Safe Sleep image instead. Huh?! I thought Safe Sleep only worked when your computer lost power while it was sleeping? I have now replicted this result four times with no problems. Still, I can't quite explain this behavior, and the only thing Andrew says is that [w]hen your Mac is set to sleep, it will now enter regular Sleep mode first (consuming minimal power). It will only enter Safe-Sleep if the battery is very low on power, or is unpluged [sic].which seems to leave open the possibility that the computer only need be low on power, but not actually sleeping, to go into Safe Sleep mode. But this is not clear here and I have not seen any posts that specifically do talk about this issue. In any event, I'm still happy that I can run down my battery without losing any unsaved data. But it would be cool if someone could clear up the issue for me. Anyone else out there with third-party batteries that can confirm my results or give a clearer explanation of what's happening here?
10.4: Enable safe sleep on some older Macs
Sleep - in and of itself, is just closing the lid or selecting sleep, and being able to wake the computer by opening the lid or pressing a key, and coming back to where you were. This is supported by all batteries, as the computer is just going into a low power mode.
forgot deep sleep...
Deep sleep is probably what some 3rd party batteries do not support. Before safe sleep, when the battery reaches a certain point, the computer enters a sleep mode that cannot be woken from without the power adapter, but is using a very minute amount of battery power to preserve the contents of RAM. If you leave it long enough like this, then the computer will just shut off from complete lack of power.
Works on iBook G4 1.33MHz
As the heading says. With a current-model iBook G4, I can close the lid, wait for the pulsing sleep light to come on, remove the battery (and AC adapter if connected) - and then put back the battery, press the power button, and watch the machine re-emerge from sleep. Very nice - and something that every x86 laptop has had for years.
Works on iBook G4 1.33MHz
Uhh, you're talking about "Hibernate" right?
10.4: Enable safe sleep on some older Macs
Safe sleep does not what you say it does. |
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