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Strange vertical stripes

Argh, I wish I'd taken a picture of the problem--it hasn't happened since Friday, but every so often, when I wake the MBP (Penryn) from sleep, I see alternating bands of light and dark vertical "stripes" along the screen. It looks as if half the LED backlights did not activate.

However, if I shut the lid and then re-open, it goes away. What gives? Is this a hardware or software fault?

If it happens again, I'll be sure to take a photo. This is ridiculous.

15" MBP (Penryn), Mac OS X (10.5.2)

Posted on Mar 2, 2008 3:47 PM

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687 replies

Jul 23, 2008 2:23 AM in response to ddh60

Hi everyone,

So I've been following this thread for a looong time now hoping that by the time I can no longer postpone my buying a new MBPro the problem would be fixed. Bummer.
And it seems something new is around the corner, perhaps one month or so, but I can't wait.

Now going back to the problem, my attention was drawn by this (^^) solution. Maybe the stripes show up only on solid color background. Huh..I doubt it, but umm...has anyone else tried switching to a picture bckgr with some luck ?

Thanks.

Jul 23, 2008 6:10 AM in response to Jotun0881

Changing the background does not stop the problem. While a background that is very dark will hide the problem, the problem is with the backlighting. For example, it is very difficult to see the problem with the Apple aurora/space picture because the entire bottom of the picture is black anyway.

However, you can still see that the backlights are alternating on and off if you have the dock showing. it just isn't quite as obvious. Some background pictures show the problem better than others. It's as simple as that.

Jul 23, 2008 11:17 AM in response to za zaza

Anyone know of any posts out there that has more than 50,000 views? Does the forum have a limit of 50,000 views and the count gets reset when it goes 50,000 + 1? Does anyone on here actually believe that moderators would keep the thread open but reduce the views on it, rather than just make the thread disappear like Hoffa?

Jul 23, 2008 2:09 PM in response to norf13

Never attribute to malice that which can be adequately explained by stupidity. (Hanlon's Razor)

If the view count was really above 60,000, then my best guess would be a 16-bit integer overflow ( http://en.wikipedia.org/wiki/Integer_overflow) that caused the views to wrap around to zero, as opposed to someone manually twiddling with the forum view count. (I mean, why bother?)

Strange vertical stripes

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