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MBA fails to wake (Platform Failure) after entering Low Power Sleep state

2011 MacBook Air 13” model number A1369



The issue: every time the battery drains empty and the device automatically shuts off, it will not properly power-on after being charged. The display backlight is active (and apple logo on the rear is illuminated) although the screen is blank. The machine doesn’t respond to any command or action. The machine will not respond to ping requests and does not appear to attempt to join the network according to the Airport logs. Closing the clamshell and re-openning does not appear to make any difference. The only action that yields any response is to hold the power button until it turns off and then turn it back on again. This has happened 100% of the time since the MacBook Air was purchased. This behavior does not happen with the 2009 MacBook pro also running OSX Lion.


pmset -g output:

Active Profiles:

Battery Power -1*

AC Power -1

Currently in use:

standbydelay 4200

standby 1

halfdim 1

panicrestart 15

hibernatefile /var/vm/sleepimage

disksleep 10

sleep 10

hibernatemode 3

ttyskeepawake 1

displaysleep 5

acwake 0

lidwake 1



pmset -g log output of problem situation:

* Domain: sleep

- Message: Sleep: Success - BATT 0 - Low Power Sleep

- Time: 8/13/11 10:32:55 PM EDT

- Signature: Success

- UUID: 79B0FD75-93BF-4F54-9206-F88EFDD9539A

- Result: Success

- Sleep count : 0


* Domain: sleep

- Message: Sleep: Platform Failure - AC 82

- Time: 8/13/11 11:58:45 PM EDT

- Signature: Platform Failure

- UUID: 399B3402-C3A6-451B-B5AC-60CF6CD5176F

- Result: Failure


Observations:

  • FileVault is enabled
  • This issue does not seem to occur when the device enters the ‘hibernation’ state after sleeping for an extended-period of time



Actions taken (with no resolution yet):

  • SMC reset (multiple times)
  • PRAM reset
  • Set main HD (“Macintosh HD”) as Startup Disk
  • Complete reinstall of OSX Lion


Any advice?

MacBook Air, Mac OS X (10.7), mid-2011 13" 1.7GHz i5 model

Posted on Aug 14, 2011 9:00 PM

Reply
46 replies

Apr 14, 2012 7:41 AM in response to billimek

Hi,


new solution: disabling the automatic brightness adjustment for the display works for me as well as adding a second user to the system.


Second, i sent an email to Tim Cook about the bugs and got the chance to talk to an apple-engineer. They are apparently aware of the issue and the reason for the key to stay in the RAM was a performance-tradeoff apparently. They fixed the DMA-Access to the FireWire port in one of the 10.7.* releases and are actively looking into it.

The engineer also sent me this new link about Thunderbolt: http://erratasec.blogspot.com/2011/02/thunderbolt-introducing-new-way-to-hack.ht ml

MBA fails to wake (Platform Failure) after entering Low Power Sleep state

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