Weird Screen/graphics glitch after update

When I took mine in to get the my board replaced I purposely held off updating to 10.5.5 so that I could replicate the problem, and I had no problem doing so in iTunes. I wonder if these problems return if you revert from 10.5.5 back to 10.5.4.

Along with others, I had hoped that 10.5.5 had resolved the issue.

Although I am no longer seeing the issue, a genius in London has confirmed that 10.5.5 has not officially resolved the issue, and is advising me to have the logic board replaced.

So anyone else in that boat, it sounds like - despite positive appearances - it may still be worth getting the logic board swapped.

I have had the logic/graphics board replaced. I still see flickering when scrolling vertically, and so does the service technician who sent it to Apple. I'm quite disappointed. 10.5.5 helped when it appeared; nothing else has helped since.

I´m having this issue again after upgrading to 10.5.6.

http://h4xr.org/bm7u

For me, Flash video has artifacts and white boxes in playback. This is something I thought was fixed with 10.5.5 but has resurfaced with 10.5.6. Maybe 10.5.5 was a software fix to cover up a hardware flaw... and 10.5.6 stopped covering it up.

Anyone else with this issue?

Does this merit a trip to the Apple store for a logic board replacement?

Same here - I'm going back to the Apple Store on Monday...

i concur. after updating to 10.5.6 it started happening again. i am not trying to get it repaired. wonder how it works in croatia...
will keep you updated

Yep - it's back for me as well after 10.5.6
Even though I'm an iMac owner, many of us have had the excact same issues as you all.

See here:
http://discussions.apple.com/thread.jspa?messageID=8686894&#8686894

The problem has returned for me as well. It seemed to have disappeared completely in 10.5.5. I updated to 10.5.6 when it was released, and for a long time everything was fine; I've only now seen the problem resurface. I hope it remains more intermittent than under 10.5.4 and earlier versions.

This is frustrating in the extreme.

This is what is happening to me; updated to 10.5.6 and everything was great and then just two days ago it started again. Wasn't too bad in the beginning but there are signs it is getting progressively worse. Flash video slightly affected, but image display on Safari will often just go nuts now.

But the killer for me is what XCode does. I could sort of forgive the earlier problems because I prefer to use emacs anyways, but with iPhone development XCode is effectively mandatory. I cannot code this way so I will give it another week and then back to (the local equivalent of) the Apple Store I go.

At this point I really do think it is a hardware issue. It looked with 10.5.5 that they had fixed this for good but now I'm thinking they didn't, and that whatever triggered this in the last few days would have triggered it on 10.5.5 too.

For the life of me I can't figure out what I might have done to trigger this.

Does anybody have any more information on this? Has apple said anything regarding this issue?

I have the same screen issues as everyone else on this forum with my MacBook Pro 15" purchased in March '08. I followed this forum for any updated information but when 10.5.5 came out the problem went away. At the same time Apple released a support document stating that NVIDIA acknowledged a problem with the GeForce 8600M GT graphics processor which is what came with my MacBook Pro. Since the problem wasn't occurring under 10.5.5 I let sleeping dogs lie. However when I updated to 10.6.6 the problem returned, although curiously, a bit more intermittently and less severe than before.

At this point I decided to take my laptop to my local Genius Bar in San Francisco. The Genius who helped me took my machine into the back room and ran a test on the graphics card. After about 20 minutes he told me the graphics card passed all the tests and there wasn't anything defective with the NVIDIA card. He then said that the problem is most likely software and that hopefully when 10.5.7 comes out it will reinstitute the fix they applied in 10.5.5 and broke in 10.5.6.

His suggestion until then was to archive and install my OS and then update back to 10.5.5.

I haven't had the time to do this as yet and I'm still living with the intermittent annoyance of scrambled text when scrolling with the track pad and flickering flash video. Very frustrating but at least I'm not alone.

Thanks for the information, good to know I'm not the only one experiencing this. I guess I'll revert back to 10.5.5.

OK, let me add my voice to the screaming masses:

I, too have an early 2008 MacBook Pro. I just did the SECOND logic board adjustment last week. The flashing / scrolling problems have NOT gone away!

So, as best I can tell, this doesn't have to do with the defective NVIDIA chip. However, it DOES seem to be software-related. The several geniuses suggested that software engineering is "working on a fix", but as this seems to have been an issue for nearly a year, I'm starting to wonder.

It DID seem as if 10.5.5 corrected the problem, and 10.5.6 caused the problem to return, so perhaps there is some hope here.

As an Apple Developer I'll probably get an early look at 10.5.7 (when it is available for testing), and let everyone know what I find out.

Let me remind everyone of TWO things that SEEMED to make a difference:

1) you should be able to use the free Quartz Debug tool (comes with free XCode install) to TURN OFF QUARTZ EXTREME. Although this will really slow down your graphics, it should STOP any defects.

2) Many of us have had good luck DISABLING "Safe Sleep mode". I've used the DEEP SLEEP widget to do this.

For both these approaches, see earlier messages.

Has ANYONE had any of these problem with the newer "glass trackpad" MacBook Pros? I'm beginning to wonder if the solution is simply to replace troublesome machines with an entirely new class of laptop?

Stephen

Stephen,
Question for you. How easy is it for you to reproduce your problems? If easy, can you post your steps?