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View Full Version : 11" ultimate laggy for the first ~12 sec upon waking




jhatz
May 2, 2011, 09:47 AM
I just got a 11" air ultimate and I'm noticing that after the lid has been closed for a few hours, when it's opened it takes a little over 10 seconds to get it up and running at smooth speeds. It's kind of annoying because my 08 black macbook would turn on and be good to go right away. Is this common?

I did the individual updates to 10.6.7 like everyone has said to do so I'm not sure what could be causing this unless it's a normal annoyance.



Oldandintheway
May 2, 2011, 10:25 AM
The first time it wakes up it takes a while to be up and running. I thought it might be something to do with hibernating. I can't find how to turn that off.

Detrius
May 2, 2011, 11:06 AM
My understanding is that it's related to the "instant on" feature. On the MacBook Air, it goes into deep sleep or hibernation more readily than other MacBooks. You can see the same kind of grogginess on another model by putting it to sleep, waiting for the light to pulse, and then disconnecting the battery. When you wake it back up (which you'll have to do by pushing the power button), it will be a bit groggy once it comes up. It's still loading stuff from disk. On the Air, it's less of an issue because you have a much much faster SSD supplying the information needed, but this feature is what gets the Air such long standby times.

Onimusha370
May 2, 2011, 02:11 PM
My 13" ultimate has a similar problem, it's laggy for the first 15 seconds after coming out of sleep. Not something to worry about though.:)

firewood
May 2, 2011, 02:46 PM
After about an hour of sleep, the MBA will go into a deep hibernation mode, which moves everything to a much much much slower memory to save a battery life (up to 1 month). Depending on what you were doing, it can just a few seconds to over 10 seconds to get everything (the working set) back into fast memory.

Since it takes so long to come out of hibernation, and booting is really fast, I just shutdown if I know I'm not going to be using my MBA for more than 1 hour.

halledise
May 2, 2011, 02:48 PM
My 13" ultimate has a similar problem, it's laggy for the first 15 seconds after coming out of sleep. Not something to worry about though.:)

shouldn't happen though - mine's up and going in around 2 seconds.
startup from off is 10-12 seconds.

you could try the following.

reset SMC
reset NVRAM
repair permissions - using disk utility.

in Terminal:
(one command at a time, the 2nd and 3rd take a little while to execute)

sudo chown root:admin /

sudo kextcache -system-prelinked-kernel

sudo kextcache -system-caches

now restart and see how you go ;)

gnasher729
May 2, 2011, 04:44 PM
I just got a 11" air ultimate and I'm noticing that after the lid has been closed for a few hours, when it's opened it takes a little over 10 seconds to get it up and running at smooth speeds. It's kind of annoying because my 08 black macbook would turn on and be good to go right away. Is this common?

If you check a bit more, you will find that the black MacBook uses a lot more of the battery if it is in sleep mode for 24 hours than the MBA. The reason is that the MacBook keeps the RAM under power in sleep mode; that empties the battery in few days, but it awakes from sleep immediately. The MBA will write its RAM to the disk and remove power from RAM after an hour or so, which means it can survive 30 days in standby, but awaking from sleep takes longer. The MacBook does the same thing when it is in sleep mode and detects that its battery is running empty.

Oppressed
May 2, 2011, 07:25 PM
shouldn't happen though - mine's up and going in around 2 seconds.
startup from off is 10-12 seconds.

you could try the following.

reset SMC
reset NVRAM
repair permissions - using disk utility.

in Terminal:
(one command at a time, the 2nd and 3rd take a little while to execute)

sudo chown root:admin /

sudo kextcache -system-prelinked-kernel

sudo kextcache -system-caches

now restart and see how you go ;)

I had this problem and after doing these steps it has solved it! Thank you kind sir.

Detrius
May 2, 2011, 11:18 PM
shouldn't happen though - mine's up and going in around 2 seconds.
startup from off is 10-12 seconds.

you could try the following.

reset SMC
reset NVRAM
repair permissions - using disk utility.

in Terminal:
(one command at a time, the 2nd and 3rd take a little while to execute)

sudo chown root:admin /

sudo kextcache -system-prelinked-kernel

sudo kextcache -system-caches

now restart and see how you go ;)

Considering this guy recommended you repair permissions to fix slowness, I'd say he has no clue what he's really talking about. For the record: repairing permissions will not fix the issue 99.999% of the time (it's effectively superstition on the internet), and clearing caches will not speed up your computer (it slows it down).

Detrius
May 2, 2011, 11:26 PM
I had this problem and after doing these steps it has solved it! Thank you kind sir.

From the things listed, my money would be on the kernel extension cache rebuild which speeds up the boot process once the cache has been rebuilt, but he's telling you to do something the manual explicitly says not to do, and that is, you shouldn't use kextcache at all. Do this:

sudo touch /System/Library/Extensions

Caution: Incorrect use of kextcache can render a volume incapable of startup. Installers and administrators should not use this program to update system kext caches. Instead they should run touch(1) on the /System/Library/Extensions/ directory of the installation target volume after they have finished, which causes the system to update all necessary kext caches.

WillieAames
May 19, 2011, 10:21 AM
From the things listed, my money would be on the kernel extension cache rebuild which speeds up the boot process once the cache has been rebuilt, but he's telling you to do something the manual explicitly says not to do, and that is, you shouldn't use kextcache at all. Do this:

sudo touch /System/Library/Extensions

Rebuilding the kernel extension cache seems to correct the issue for a few days, then I see the wake from sleep lag return again.

Anyone else having this issue? Any thoughts on what could be causing this?