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scrolling causes "background noise" on webpages

271 Views 4 Replies Latest reply: Dec 3, 2012 1:07 PM by Tuxtla RSS
David Duff Calculating status...
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Dec 2, 2012 6:12 PM

i have a macbook pro. 

 

when i scroll certain webpages in safari, the pages (generally the page background) gets a strange and dynamic pattern of "noise" on it.   the noise comes and goes as a i scroll.  if i stop scrolling at certain points, the noise remains as a static image.  

 

speculation is that this is either a software bug or a hardware bug in the graphics card.    for example, some video memory is supposed to get cleared is not getting cleared or something. 

 

for some reason, it happens more on some pages than on others.   oddly, it tends to happen a lot on pages on apple's own website. 

 

this is more or less "stock" safari 6.0.2 on mac os x 10.7.5.   a macbook pro (8,2 unibody) a bit over a year old with AMD Radeon HD 6750M and Intel Graphics (i'm not sure which of those is actually in use).

 

i can capture the noise using the "grab" application, so you can see it in the attached image.  

 

all of that grey junk behind the text is what i'm talking about.  the actual page that is being shown is here: http://www.apple.com/itunes/itunes-match/ and you can see that there is no such "texture" in the page, but rather that this is some kind of rendering bug. 

 

any ideas what

  • c0edx Calculating status...
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    Dec 3, 2012 9:35 AM (in response to David Duff)

    Wish I can help but I'm having the same issue with my rMBP 15" Safari is acting funny and when I scrool thrugh the website like Yahoo.com it lags really bad its not smooth at all.

  • Tuxtla Calculating status...
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    Dec 3, 2012 1:07 PM (in response to David Duff)

    I have the same issue but it's compounded by the fact that after a page in Safari turns to garbage - the screen will often flash and then the computer freezes completely. I've also had issues with Safari not turning to garbage or the machine freezing but Safari seeming to cause my Airport Extreme to reboot which in turn causes the internet router it's connected to to drop off line.

     

    To do some testing I reinstalled a fresh ML 10.8.2 system and spent the morning working in Chrome without any screen or internet problems. Within 10 minutes of starting Safari the AExtreme dropped offline. No Safari garbage windows yet.

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