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flemingt Author

Level 1

10 points

10.6.3 13" MacBook LCD backlight off after resume form sleep.

Hi all, 1st time poster, not had a problem with my Mac I couldnt solve until now....

I've updated to 10.6.3 using software updater. Since then when I resume from hibernate the LCD backlight of my MacBook does not turn back on. There is a very faint image on the screen, so I know its just the backlight. The F1 & F2 keys won't control the backlight in this state, I also noticed that when this happens F5 & F6 won't adjust the keyboard backlight either.

Things I've tried:
commented out my .sleep & .wakeup scripts
reset pram
Onyx
checked colour profiles
deleted com.apple.PowerManagement.plist

the problem persists. If it occurs again I'm going to try the 10.6.3 combo update. Has anyone else come across this?

13" Alu Macbook (Late 2008), Mac OS X (10.6.3)

Posted on Apr 1, 2010 3:24 AM

100 replies

R C-R

Level 6

17,782 points

May 12, 2010 7:24 PM in response to rprice54

FWIW, in the past I have gotten the same sort of email from Apple with a similar attachment. That has always been in response to my contacting Apple first about a problem, never an unsolicited request.

IIRC, the email was always from the AppleCare representative I had spoken with on the phone about the issue, not from some generic 'Apple' name.

flemingt Author

Level 1

10 points

May 13, 2010 1:53 AM in response to R C-R

I too received this app yesterday, I didn't want to say in case it violated some policy.

I also pointed the rep to my bug report number (which had logs pre & post install) and to this thread.

It looks like this is a "real" issue. I'm just glad that it's being investigated.

flemingt Author

Level 1

10 points

May 21, 2010 12:24 PM in response to flemingt

bump, just wondering if anyone has heard anything further or managed to resolve the problem?

chargen

Level 1

0 points

Jun 11, 2010 3:27 PM in response to flemingt

I have the exact same symptoms reported.

Jun 16, 2010 3:53 PM in response to flemingt

just had the same issue occurred on 10.6.4

macosfun

Level 1

0 points

Jun 17, 2010 9:08 AM in response to flemingt

Same for me: 10.6.4 does not solve the problem with MBP 15" early 2009.

flemingt Author

Level 1

10 points

Jun 18, 2010 3:03 AM in response to macosfun

OP here. 6.4 has not resolved the issue for me either

Jun 18, 2010 3:48 AM in response to flemingt

Same for me on 13" MacBook.

Message was edited by: LordTarrasque

Jun 18, 2010 4:32 AM in response to flemingt

In a terminal window:
pmset -g
<press return>

What are the results?

flemingt Author

Level 1

10 points

Jun 18, 2010 5:10 AM in response to whyisitsohard

Active Profiles:
Battery Power -1
AC Power -1*
Currently in use:
womp 0
lidwake 1
halfdim 1
sms 1
hibernatefile /var/vm/sleepimage
disksleep 10
sleep 0 (imposed by 2389)
hibernatemode 1
ttyskeepawake 1
displaysleep 10
acwake 0
autorestart 0

Jun 18, 2010 5:31 AM in response to whyisitsohard

This is mine.

Active Profiles:
Battery Power -1
AC Power -1*
Currently in use:
womp 1
halfdim 0
sms 1
hibernatefile /var/vm/sleepimage
gpuswitch 2
disksleep 10
sleep 0
hibernatemode 1
ttyskeepawake 1
displaysleep 10
acwake 0
lidwake 1

Jun 18, 2010 3:10 PM in response to flemingt

Did you upgrade from Leopard or was this a clean installation of Snow Leopard on an empty hard drive?

Jun 19, 2010 1:01 AM in response to whyisitsohard

MBP - clean install.

My other MB (work machine) that also had the same issue in 10.6.3, came with snow leopard pre-installed. I have since clean installed and upgraded to 10.6.2, sleep/wake with external display plugged in works perfectly.

Jun 19, 2010 4:01 AM in response to Rusty5390

If it is under warranty / Applecare have you had the hardware checked?
What do Apple tech support have to say?

Even if diagnostics are run and no error codes are found there can still be a hardware issue.

Jun 19, 2010 7:57 AM in response to whyisitsohard

Thanks for trying to figure out what the cause might be 🙂

Unfortunately, I have to disagree with the assumption that it's hardware related. Short chart explaining my MBP and MB history,

MBP -> clean install of 10.6.1 (perfect) -> 10.6.2 (perfect) -> 10.6.3 (sleep/wake issue) -> 10.6.4 (sleep/wake issue still occur)

MB -> bought with 10.6.1 installed (perfect) -> 10.6.2 (perfect) -> 10.6.3 (sleep/wake issue) -> clean install 10.6.1 (perfect) -> 10.6.2 (perfect)

My MB is a work machine, it has to work so I left at 10.6.2 since it was the last known good version to me. MBP is my personal machine, I didn't have the heart to reinstall OSX so I am leaving it with the wake issue for now.

10.6.3 13" MacBook LCD backlight off after resume form sleep.