Sleep Memory Extension Blocks Laptop Bug -- Apple's new Sleep Memory Extension helps protect iBook and PowerBook (FireWire) computers from data loss or corruption when using the "Preserve memory contents on sleep" feature under low memory situations (see "iBook, PowerBook Data Loss Problem Noted" in TidBITS-521). The extension, a 184K download, disables the "Preserve memory contents on sleep" checkbox in the Energy Saver control panel. This disables the computer's capability to preserve memory contents to disk for recovery in the event of total power loss during sleep; however, it also prevents users from stumbling into the data loss problem associated with the feature. We still expect Apple to address the actual problem in an upcoming software release; in the meantime, this extension keeps users out of harm's way. The extension works on English and localized versions of the Mac OS, though the ReadMe file is available in only English. [GD]
Wake On Demand in Snow Leopard
Putting your Mac to sleep saves power, but it also disrupts using your Mac as a file server, among other purposes. Wake on Demand in Snow Leopard works in conjunction with an Apple base station to continue announcing Bonjour services that the sleeping computer offers.
While the requirements for this feature are complex, eligible users can toggle this feature in the Energy Saver preference pane. It's labeled Wake on Network Access for computers that can be roused either via Wi-Fi or Ethernet; Wake on Ethernet Network Access or Wake on AirPort Network Access for wired- or wireless-only machines, respectively. Uncheck the box to disable this feature.
Published in TidBITS 522.
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