Horizontal Screen problem while scrolling up / down

Discussion in 'macOS' started by ytorell, May 9, 2009.

  1. ytorell macrumors newbie

    Joined:
    Dec 23, 2008
    #1
    Dear Mac Os X Forum:

    Mac OS X 10.5.6 (9G55)

    Since I download a third party App (Istat) which monitors the CPU and temperature... I have acquired a problem which occurs to the screen whenever I am on a webpage and scrolling up or down a on any given page.

    The problem:
    There is a horizontal line which appears like a split in the screen and distorts the image (shimmering) during scrolling on web pages.

    It happens in 1 or 2 spots like a horizontal cut across the screen dividing the screen whenever scrolling.

    I have uninstalled all the Istat software, but this screen malfunction has not gone away.

    Troubleshooting already done: Checked to see if same scrolling problem happens on other monitors, yes it does. So it's not a monitor issue.

    I have updated software 3 times so far to see if it is caused inconsistency in mac software.

    My computer config. is a Mac Pro 8 core duo.
    Model Name: Mac Pro
    Model Identifier: MacPro3,1
    Processor Name: Quad-Core Intel Xeon
    Processor Speed: 2.8 GHz
    Number Of Processors: 2
    Total Number Of Cores: 8
    L2 Cache (per processor): 12 MB
    Memory: 4 GB
    Bus Speed: 1.6 GHz
    Boot ROM Version: MP31.006C.B05

    Graphic Card is:
    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: 0x0602
    Revision ID: 0x00a2
    ROM Revision: 3233
    Displays:
    Cinema HD:
    Resolution: 1920 x 1200
    Depth: 32-bit Color
    Core Image: Hardware Accelerated
    Main Display: Yes
    Mirror: Off
    Online: Yes
    Quartz Extreme: Supported
    Rotation: Supported
    Display Connector:
    Status: No display connected

    System Version: Mac OS X 10.5.6 (9G55)
    Kernel Version: Darwin 9.6.0
    Boot Volume: Macintosh HD
    Boot Mode: Normal

    I have also booted the system from Mac software, and check both the software and hardware to see if there was anything to repair.

    Does anyone have any idea of what else I can do to get rid of this scrolling problem, because it may be a sign something else is wrong, or the graphics card has been damaged in some way. The scrolling issue is hard on the eyes.

    Please inform.

    Thanks,

    Ytorell
     
  2. MWPULSE macrumors 6502a

    MWPULSE

    Joined:
    Dec 27, 2008
    Location:
    London
    #2
    going with my own experience, i would say that this isnt a istat problem.

    also looking at the various troubleshooting practices you have done already it would seem that it is a hardware fault. I have never seen/heard anything of this nature purely on a software nature. i.e theres normally some hardware issue involved.

    You might want to get it checked out

    Hope this helps
    PTP
     
  3. pairdoc macrumors newbie

    Joined:
    Jan 5, 2010
    #3
    bump - Mac Pro monitor horizontal line slice problem

    Haven't seen an update to this issue, which I began experiencing on my Mac Pro (early 2007) with ATI Radeon X1900 card. I am seeing the issue on one of my two 30" Cinema Display Monitors, but when I reverse the monitor cable positions on the video card ports , the problem switches to the other monitor, thereby implying that the problem is associated with one port on the card and not the other. I called Apple, who sent me a brand new video card. However, after installing it, the problem remains identical. This leads me to believe that the issue could be something related to the motherboard.

    BTW, I only have the issue when I am using the monitors in mirrored mode, not when I use them as two separate monitors.

    Thanks.

    Stu
     
  4. LEK2 macrumors newbie

    Joined:
    Jan 9, 2010
    #4
    Scrolling issues with dual 8800GTs

    I have been having an issue which I believe started with the Snow Leopard upgrade. I will see corruption of an individual window when scrolling vertically, usually appearing as text remaining in place in an area of 30 pixels high or so while the text below scrolls over it. If I scroll the affected region completely out of view, then back, it is fine. This happens a few times a day, so it is not really a show-stopper, but a bit annoying.

    This occurs on all three of my monitors (a 30" Cinema display, flanked by two ViewSonic 20.1" units rotated to 1200x1600), which are driven off two separate 8800GTs in a Mac Pro 8 core, so I don't think it can be tracked to only one of the graphics cards. Seems more like a driver problem, though hard to be sure. Everything is up-to-date OS-wise.

    Model Name: Mac Pro
    Model Identifier: MacPro3,1
    Processor Name: Quad-Core Intel Xeon
    Processor Speed: 2.8 GHz
    Number Of Processors: 2
    Total Number Of Cores: 8
    L2 Cache (per processor): 12 MB
    Memory: 10 GB
    Bus Speed: 1.6 GHz
    Boot ROM Version: MP31.006C.B05
    SMC Version (system): 1.25f4

    NVIDIA GeForce 8800 GT: (First card)

    Chipset Model: NVIDIA GeForce 8800 GT
    Type: GPU
    Bus: PCIe
    Slot: Slot-1
    PCIe Lane Width: x16
    VRAM (Total): 512 MB
    Vendor: NVIDIA (0x10de)
    Device ID: 0x0602
    Revision ID: 0x00a2
    ROM Revision: 3233
    Displays:
    Cinema HD:
    Resolution: 2560 x 1600
    Pixel Depth: 32-Bit Color (ARGB8888)
    Main Display: Yes
    Mirror: Off
    Online: Yes
    Rotation: Supported
    Display Connector:
    Status: No Display Connected

    NVIDIA GeForce 8800 GT: (Second card)

    Chipset Model: NVIDIA GeForce 8800 GT
    Type: GPU
    Bus: PCIe
    Slot: Slot-2
    PCIe Lane Width: x16
    VRAM (Total): 512 MB
    Vendor: NVIDIA (0x10de)
    Device ID: 0x0602
    Revision ID: 0x00a2
    ROM Revision: 3233
    Displays:
    VP2000s:
    Resolution: 1200 x 1600 @ 60 Hz
    Pixel Depth: 32-Bit Color (ARGB8888)
    Mirror: Off
    Online: Yes
    Rotation: 90
    VP2000s:
    Resolution: 1200 x 1600 @ 60 Hz
    Pixel Depth: 32-Bit Color (ARGB8888)
    Mirror: Off
    Online: Yes
    Rotation: 90
     
  5. delight macrumors newbie

    Joined:
    Dec 25, 2012
    #5
    ytorell,

    Did you ever find a resolution to this problem? I have the exact same issue on my brand-new late 2012 MacBook Pro retina display.

    I also lose some text on the display at times, and then it pops back up after further typing. My late 2009 MacBook Pro never did these things.

    I am very disappointed. Maybe this is a manufacturer defect?

    Delight
     
  6. benwiggy macrumors 68020

    Joined:
    Jun 15, 2012
    #6
    If you have a problem with a brand new machine: take it back to the shop for replace or refund. At the very least, you have AppleCare for 3 months as standard.
     
  7. delight macrumors newbie

    Joined:
    Dec 25, 2012
    #7
    Thank you. That is what I will do!

    Delight
     

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