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

I have this problem since updating to 10.6.3 on my 17" macbook Pro.
I saw a solution regarding replacing files from 10.6.2, does that really work? can anyone indicate what needs to be changed in the files so I can just edit the mis configuration.

I thought this stuff never happens on a Mac I guess the PC guy has one to ping the Mac dude now. 🙂

I rang AppleCare and they said with the 10.6.3 update that this is not [yet] listed as a known issue. I hope that enough people will have this problem that a fix is put in place, at the moment it seems like no-one's found a fix that guarantees sleep works again.

If you're listening Apple are you actively looking at this problem we're having?

dcgi wrote:
If you're listening Apple are you actively looking at this problem we're having?

dcgi, as a new user of Apple Discussions, you may have overlooked that it is a group of user-to-user forums with no official Apple participation other than from the moderators. There is no guarantee that anyone else from Apple will see the comments you post here, nor do the posts in Discussions typically include the specific, detailed info Apple engineering needs to determine a problem's cause or cure.

For that, you can use the Apple Product Feedback page, select the category that best fits the issue (usually Max OS X but possibly one of the hardware items) & fill in the feedback form. Make sure you choose 'bug report' from the first popup & provide all the relevant technical info you can.

If you are covered by AppleCare & call them, if your issue is not resolved during the call, make sure they know that before you hang up & ask for an incident tracking number for your issue.

Coming back to the relevant discussion to the thread topic...

I too have replaced the kext file with a 10.6.2 version. Before I did that, my MBP was consistently waking with backlight off.

I have been monitoring the backlight behaviour for a week or so now, the backlight has been behaving correctly except for one or two occasions in the first few days. To me, it definitely made an improvement.

Looking forward to the official fix from Apple.

I have found that I have this problem once I have connected it to my Dell 2407WEP, so something with loading the second display creates this problem.

Update: I called apple care support and they walked me through some this special reboot process. hold down option command P and O keys I believe thats what it was. The tech said it clears out some memory. he walked me through some display exercises and made sure all my dual display worked and we forced it to sleep and it all appeared to work. I said well it happens after I remove the dvi connection, so he said do that, I closed the lid, let it sleep, it then woke up. Before I called him it would not. that special key thing must have cleared some cached drivers possibly. Have no idea, but it works now, will keep you posted if it returns, but for now I'm happy.

Please - everyone experiencing this issue - file bug reports with Apple!!

http://bugreport.apple.com/

Apple do know about this issue. The more reports they get, the more they will be encouraged to fix it.

Good point, just done one.

Submitted a bug report..

if you get an error when trying to login to the bug reporter you probably have to officially register here:

http://developer.apple.com/programs/register/

Then once you've verified your account you will be able to login and submit a bug report.. make sure you open the system profiler and file => save a .spx to upload with the bug report so they have more information to go on.

Yes it was opt-cmd-P-R You have to do as it you come out of power on from the switch.

FWIW, what you described is called "resetting PRAM." PRAM = parameter RAM, special memory in the Mac that holds certain system settings whether it is powered up or not.

The OP mentioned trying this in the first post.