I have a Retina MBP and have the following settings using pmset -g
As you can see below, standby is 1
and hibernationmode is 3
, meaning that I have DEEP SLEEP turned on, after 7200 seconds.
Do I need to have hibernation on ? or off ? I read somewhere the SSD don't need hibernation option, and can save memory (which is saved in /var/vm/sleepimage
I'm assuming). Is this true ?
If I don't need it, how can I turn it off ? Because the settings I currently have using pmset -g
is confusing, and not sure if they should look this way, can you inform me if I have weird values there ?
On power :
Active Profiles:
Battery Power -1
AC Power -1*
Currently in use:
standbydelay 7200
standby 1
womp 1
halfdim 1
hibernatefile /var/vm/sleepimage
darkwakes 1
gpuswitch 2
networkoversleep 0
disksleep 0
sleep 0
autopoweroffdelay 14400
hibernatemode 3
autopoweroff 1
ttyskeepawake 1
displaysleep 60
acwake 0
lidwake 1
and on battery :
Battery Power -1*
AC Power -1
Currently in use:
standbydelay 7200
standby 1
halfdim 1
hibernatefile /var/vm/sleepimage
darkwakes 0
gpuswitch 2
disksleep 0
sleep 180
autopoweroffdelay 14400
hibernatemode 3
autopoweroff 1
ttyskeepawake 1
displaysleep 5
acwake 0
lidwake 1
Thanks !
Best Answer
No - almost no one is so starved for battery power that full on Hibernation mode makes sense for them. So for any Mac with a battery - keep with mode 3 and avoid modes 0 and 25.
I never change Apple's default settings unless I have a reason that I can write down in a sentence as to why I want it changed. In this case, there's no real benefit to me for the alternate modes (and certainly not for any further unsupported combination that the full man page and
pmset
allows)Here is the manual page for
pmset
which has very excellent help and documentation on hibernate mode (I wish all man pages were this awesome):So, as you can see - Mode 0 (binary 0000) is not really helpful for a retina MBP and doesn't save any battery. Mode 3 (binary 0011) is the default and what I recommend. If you didn't mind a slower sleep and higher amount of data written to the drive each time you enter sleep (as opposed to the write happening once sleep has drained the power to a low warning level around 5% reserve) you might try using Mode 25 to see if your slower sleep/wake is worth the extra battery life preservation since the Mac won't sleep but instead hibernates all the time with power off when the normal sleep time comes.