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janrinok writes:
From an ARS Technica story:
Linux 3.15, expected to be released in mid-2014, "will feature a large number of ACPI and power management updates" and allow Linux-based computers to suspend and resume faster, Phoronix reported today.
'Visible to users with the Linux 3.15 kernel should be reduced time for system suspend and resuming, thanks to the enabling of more asynchronous threads,' the article said, pointing to a list of changes posted by Rafael Wysocki, an Intel employee who maintains the Linux kernel's core power management code. Basic support for Nvidia's Maxwell architecture is also in the works for Linux 3.15.
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New Linux Version will Reduce Suspend/Resume times
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(Score: 3, Informative) by tchuladdiass on Monday March 24 2014, @03:19PM
If you want the best of both worlds -- suspend for, say, a couple hours, then go into hibernate (so your battery isn't drained from being suspended for a couple days), take a look at this ask-ubuntu question, and the accepted answer:t omatically-from-suspend-into-hibernate [askubuntu.com]
http://askubuntu.com/questions/12383/how-to-go-au
This works by setting an rtc timer event to kick off a couple hours after suspend, to wake up and then go into hibernation.
Note, that it is highly recommended that you initially set the timeout to something low (such as a few minutes), and try it out with several different system loads, to make sure that hibernate works correctly after suspend. Otherwise, your laptop may come out of suspend, fail to hibernate, and then be left in a powered on state when it is in your laptop bag.