White blocks while scrolling

Discussion in 'Mac Pro' started by GoCubsGo, Jun 7, 2008.

  1. GoCubsGo macrumors Nehalem


    Feb 19, 2005
    I've tried to think of the best way to explain this and I cannot grab a screen shot of it (tried). Oh and sorry I don't have a shot of the next iPhone or a question when it'll be released. :p

    In iTunes, Safari, & Firefox I have noted some odd behavior as far as page rendering goes. I'll have the screen size set to anywhere from 1269x963 to 1530x1385. These are just random measurments of typical window sizes from time to time. Clearly they vary.

    When I am scrolling up and down white blocks appear, they're dynamic really, flickering even. What I tried to do was mimic the behavior so that it could be understood. I noticed this day one but almost figured that was just how things were. I haven't ever noticed this on my old PowerBook. The number and placement of such boxes varies. I think it's how pages are being rendered but I am not sure.

    If this is an issue I'm outside my 14-day window to return but I am certain it can be fixed so I'm not overly concerned. But I want to ask anyway.
    Here are the specs of my machine:
      Model Name:	Mac Pro
      Model Identifier:	MacPro3,1
      Processor Name:	Quad-Core Intel Xeon
      Processor Speed:	2.8 GHz
    Memory (DIMM1 on Riser A & B contain the following)
      Size:	1 GB
      Type:	DDR2 FB-DIMM
      Speed:	800 MHz
      Status:	OK
    NVIDIA GeForce 8800 GT:
      Chipset Model:	NVIDIA GeForce 8800 GT
      Type:	Display
      Bus:	PCIe
      Slot:	Slot-1
      PCIe Lane Width:	x16
      VRAM (Total):	512 MB
      Vendor:	NVIDIA (0x10de)
      Device ID:	0x0611
      Revision ID:	0x00a2
      ROM Revision:	3233
    Cinema HD:
      Display Type:	LCD
      Resolution:	2560 x 1600
      Depth:	32-bit Color
      Core Image:	Hardware Accelerated
      Main Display:	Yes
      Mirror:	Off
      Online:	Yes
      Quartz Extreme:	Supported
      Rotation:	Supported
    Not knowing if my connection speed has anything to do with it, I'm posting the results from a speed test connected via ABES (wireless) through Time Warner.
    Download: 6636 Kb/s Upload 470 Kb/s Latency 22ms

    Finally, I can say that this behavior isn't repeated if I take a screenshot, open in preview, size the window to around 1000x800 and scroll like a madwoman. :)

    Any feedback is appreciated, even if you just want to say good morning. :)

    Attached Files:

  2. eluk macrumors 6502a


    Dec 14, 2006
    East London, UK
    Good Morning.

    I can only say that this does not occur with me and therefore should be regarded as a problem. BTW I have the Radeon HD 2600 XT.
  3. GoCubsGo thread starter macrumors Nehalem


    Feb 19, 2005
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/4A102 Safari/419.3)

    thank you. :) I will see if anyone else has feedback but sometime next week I'll call Apple and see what they have to say.
  4. Darwin macrumors 65816


    Jun 2, 2003
    round the corner
    I too would be interested in Apple's explanation of this problem, I've noticed a similar issue on my newly purchased MacBook Pro. At first I thought that it was a Safari rendering error since it occurred in both Safari and in the iTunes Music Store, however I see this happening in the Finder when scrolling as well as in iPhoto.

    It makes sense if its connected to graphics card but I'm hoping that I don't need to get a replacement. :(

    If you are able to get an answer from Apple jessica. I would be interested to hear what they have to say.


    Note: I've noticed in Safari that once the whole page has been loaded the glitch does not appear until another page is accessed, it was this that had made me shift towards a rendering issue but of course I'm not certain.
  5. jazz1 macrumors 65816


    Aug 19, 2002
    Mid-West USA
    Me Too-Wonder if It is Time to Blow Out the Dust?

    Could this be caused by the video card overheating? I've got a 2.66 with the standard NVIDIA GeForce 7300 GT. The machine has been uploading for hours and I had been watching some You-Tube.

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