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Sleep Mode
- Details
- Category: Mac OS X 10.6 Snow Leopard
- Published Date
- Written by angusf
- Hits: 366
My MacBook Pro has got more and more unrealiable about sleeping since I :-
- Dropped it
- Replaced the internal drive with a bigger hybrid drive with 8GB SSD and 500GB
- Replaced the battery with a non Apple 'compatible' one
- Updated to 10.6.8
Looking round the net I found that there are a few choices about sleep mode, although they aren't settings easily available from System Preferences.
Recent Intel MacBooks and MacBook Pro's leave some power running while sleeping (the system light 'breathes' ad a visual indicator) the memory is powered on and also written to disk before sleeping. If there is a power loss, the system is supposed to enter hibernation mode automatically.
What I am finding is that default sleep mode isn't working. My mac wont recover from sleep anymore. I suspect the third party battery, but the old battery was unusable. I am trying hibernate always - I will report back if this works for me after a week or so.
I found that you could view and change the sleep setting using Terminal :-
Last login: Wed Jun 29 23:48:45 on ttys000
$ pmset -g | grep hibernatemode
hibernatemode 0
$ sudo pmset -a hibernatemode 1
Password:
$ pmset -g | grep hibernatemode
hibernatemode 1
$
Hibernatemode
0 - Old Sleep mode.
1 - Hibernate with full shut down and slower startup white screen with progress bar on wake up (reports as mode 5, if secure virtual memory enabled)
3 - Default Sleep mode Sleep until critical power loss then hibernate. (reports as mode 7, if secure virtual memory enabled)