13 Replies Latest reply: Dec 29, 2012 2:22 PM by NullUnit
Julian Morgan Level 1 (55 points)
I recently replaced my old dead gfx card with a Radeon HD 5770 and it works okay most of the time - and is pretty bombproof with one display. Occasionally on starting up and 90% of the time on waking from sleep one of the displays is greyed out with a grey fuzz . . . if I sleep the mac with the power button and then wake it up again it will sometimes solve the problem, sometimes not.

Oh and one display is running off the MDP with a Apple supplied MDP to DVI adaptor and one of the DVI. I thought it might be something flakey with my OS install so I tried it with a clean install of 10.6.0 on a spare drive and I'm getting the same problem. I'll upgrade the clean install to 10.6.5 while waiting for answers to this - might even answer my own question!

Other than that, I've so far tried resetting the SMC and re-installing the 10.6.5 combo update . . . any other ideas?

Oh and lastly, when you do an SMC reset do you have to unplug everything? All USB and FW and displays?


Quad Mac Pro 2.66 GHz 6GB RAM, Mac OS X (10.6.5), ATI Radeon HD 5770
  • Andi-0815 Level 1 (15 points)
    I have the same problem, even with one monitor, connected with DVI. During boot I sometimes get a kind of "noise" image. The only solution I found is the hot-corner workaround.

    I am pretty sure that it's a driver problem, because there is absolutely no problem with Windows on the same computer.

    Switching off the display does never help.

    The problem is always there when I boot from Windows to Mac OS.

    Message was edited by: Andi-0815
  • Fjan Level 1 (10 points)
    Same issue here with new Mac Pro and the HD 5870. Sleep / waking the Mac works but power cycling the Dell monitor sometimes works too. I have a 27" Apple monitor attached as a second monitor and that one is fine.

    From what I gathered so far it is probably an issue with the HDCP key getting out of sync with older monitors.
  • smallscript Level 1 (0 points)

    I also have the exact same fuzzy issue. I am convinced it is a driver issue. I have experimented pretty extensively to try and solve the issue with hardware and software variations (I happen to have two fully loaded Mac Pros and multiple MDPs). I run three monitors on it - which is fabulous. I have spoken with Apple Tech Support online and also been to Mac Genius Bar(s) to work on it. Again, conclusion is a driver issue. Call Apple, bug them, otherwise they will not know...


    I find the snowy fuzzy monitor effect occurs somewhat at random but appears related to mode or buffer switching. I also notice that when the screen is almost all black then one of my monitors which is on the Mini DisplayPort shows significant "sparkling".


    To correct the problem, I unplug and replug one of the mini-dvis from the back of Mac Pro forcing a monitor reset. That corrects it 100% of the time. I was really frustrated and annoyed by this until I hit on that remedy. Now it is merely annoying. The reach down, unplug, replug reset takes about 3-5 seconds to do.


    Hardware Overview:


      Model Name:          Mac Pro

      Model Identifier:          MacPro3,1

      Processor Name:          Quad-Core Intel Xeon

      Processor Speed:          3.2 GHz

      Number Of Processors:          2

      Total Number Of Cores:          8

      L2 Cache (per processor):          12 MB

      Memory:          32 GB

      Bus Speed:          1.6 GHz

      Boot ROM Version:          MP31.006C.B05

      SMC Version (system):          1.25f4


    ATI Radeon HD 5770:


      Chipset Model:          ATI Radeon HD 5770

      Type:          GPU

      Bus:          PCIe

      Slot:          Slot-1

      PCIe Lane Width:          x16

      VRAM (Total):          1024 MB

      Vendor:          ATI (0x1002)

      Device ID:          0x68b8

      Revision ID:          0x0000

      ROM Revision:          113-C0160C-155

      EFI Driver Version:          01.00.436



      Resolution:          2560 x 1600

      Pixel Depth:          32-Bit Color (ARGB8888)

      Main Display:          Yes

      Mirror:          Off

      Online:          Yes

      Rotation:          Supported

      Adapter Type:          Mini DisplayPort To Dual-Link DVI Adapter

      Adapter Firmware Version:           1.01

    HP LP3065:

      Resolution:          2560 x 1600

      Pixel Depth:          32-Bit Color (ARGB8888)

      Mirror:          Off

      Online:          Yes

      Rotation:          Supported

      Adapter Type:          Mini DisplayPort To Dual-Link DVI Adapter

      Adapter Firmware Version:           1.03


      Resolution:          2560 x 1600

      Pixel Depth:          32-Bit Color (ARGB8888)

      Mirror:          Off

      Online:          Yes

      Rotation:          Supported

  • danseq Level 2 (155 points)

    I have this problem too!


    Never used to occur on my old 2007 machine, but on my brand new 6-Core MacPro I get it every time I wake up from sleep or often after a cold boot.


    I'm running a Samsung 305T 30" at 2560x1600 off of the DVI port, with a Gefen extender.


    It usually goes away after I toggle the monitor on/off a few times. Or maybe that's just placebo and it goes away after some period of time anyway. Highly annoying.

  • Saul in PA Level 2 (295 points)

    Had the same problem with my mini.  One of the software updates seems to have solved it.  Moved the same monitors to my Pro and no issues with 10.6.7

  • massi78pt Level 1 (0 points)

    Hi everybody,


    same problem here, just replaced my Nvidia few months ago with an ATI Radeon HD 5770 and i'm getting this kind of TV static noise sometimes on boot. Most of the times its enough turning off and on again the monitor on wich is occurring, I've two samsung LCD and usually this happens on the primary one. My spec are:


    Nome modello:    Mac Pro - SnowLeopard 10.6.7

      Identificatore modello:    MacPro3,1

      Nome processore:    Quad-Core Intel Xeon

      Velocità processore:    2,8 GHz

      Numero di processori:    2

      Numero totale di nuclei:    8

      Cache L2 (per processore):    12 MB

      Memoria:    12 GB

      Velocità bus:    1,6 GHz

      Versione Boot ROM:    MP31.006C.B05

      Version SMC (sistema):    1.25f4

    Modello Chipset:    ATI Radeon HD 5770

      Tipo:    GPU

      Bus:    PCIe

      Slot:    Slot-1

      Larghezza Lane PCIe:    x16

      VRAM (totale):    1024 MB

      Fornitore:    ATI (0x1002)

      ID dispositivo:    0x68b8

      ID revisione:    0x0000

      Revisione ROM:    113-C0160C-155

      Versione driver EFI:    01.00.436



      Risoluzione:    1440 x 900 @ 60 Hz

      Profondità pixel:    Colore 32 bit (ARGB8888)

      Monitor principale:    Sì

      Mirror:    Spento

      Online:    Sì

      Rotazione:    Supportata


      Risoluzione:    1440 x 900 @ 60 Hz

      Profondità pixel:    Colore 32 bit (ARGB8888)

      Mirror:    Spento

      Online:    Sì

      Rotazione:    Supportata


    Exteriorly its just a bit annoying but i wonder if it could be just a visible part of a bigger problem. I'm not really a gamer but I own a few, and many of them (the more demanding ones maybe) have stopped working since i switched to ATI.

  • paulfromgrifton Level 1 (0 points)

    Similar issues with new Mac Pro 1,1 ATI HD 5770 upgrade.  Running two ViewSonic W2330 LCD (2006).  Waking from sleep mode the monitor 1 has the crazy pixel dance in rainbow colors.  I can resolve after changing display rez then back to 1680 x 1050.  Love the GPU performance but concerned the card is bad or going bad.  I see a few think its a driver issue,  I hope thats all it is and Apple will have the fix in an update.  I'm still using 10.6.8.

  • sanaponic Level 1 (0 points)

    I just want to tell that I have a similar problem:


    MacPro (Dual 4-Core Xeon, 2,8GHz), Lion 10.7.2, Radeon HD5770, Monitor Samsung SMS27A850


    When I (or some software) changes the resolution I get a screenfull of noise. Switching off the monitor and switching it on again brings back the picture.


    Happens also with Snow Leopard.


    Doesn't happen with Windows XP on the same machine.



  • alexofindy Level 1 (10 points)

    Same problem on my Mac Pro 3.1.  Began as soon as I installed the Apple-branded 5770.  Anyone find a solution? If not, what is the best way to "tweak" Apple in to fixing their driver?  My Mac Pro is off AppleCare now, but my new 5770 is still under it's one year warranty. 


    Doesn't seem to be worth getting a new card under the warranty, if the problem is likely to be the driver.

  • The hatter Level 9 (60,930 points)

    Someone somewhere in a thread about 5770s and issues, one person went through a couple replacements and the newest revision chipset was fine.


    As much as it is easy to fault drivers, and I don't know enough to say yea/nay, it is also true that a card design and chipset and even firmware doesn't stay locked and are changed.


    Just never know when or what they are cooking.


    Seeing the card is under its own warranty, stay with getting it the attention and "take it to the doctor for checkup."

  • smallscript Level 1 (0 points)

    For some of you, a possible fix might be found in the following Apple Technical Article which might entitle you to a free part exchange.


    See article TS3232

    • Mini DisplayPort to Dual-Link DVI Adapter: About Firmware Version 1.03



    Learn what to do if you encounter continuous flickering on your monitor or if you have issues when waking your Mac from sleep while using a Mini DisplayPort to Dual-Link DVI Adapter.

  • alexofindy Level 1 (10 points)

    Well, I intend to follow the above advice and try to replace my 5770 before the 1 year warranty on the card runs out.


    Here's a question:

    I kept the original graphics card in my system, so I have two graphics cards - the 5770 and the 2600.  I occasionally get the fuzzy screen, right after I wake the computer from sleep.  I "fix" it by sleeping and reawakening the box.


    Recently, I installed another expansion card, a Highpoint USB 3.0 card.


    And the fuzzy screens seemed to occur more often, including times when I had not just woken the computer up from sleep.  I removed the USB 3.0 card.


    My question: the fuzzy screen, which is described under various threads multiple times on this forum, so it is a common problem, may be related to voltage fluctuations on the PCIe bus.  Now, I remember reading a few years ago that some HDCP compliant graphics hardware had a "tilt" bit that was designed to detect the insertion of "rogue" hardware in a computer that might be used to pirate video signals.  When such hardware was purportedly detected by the graphics card, it would either reset or cause the OS to reset the graphics system to prevent the "alleged" signal piracy.  My question: does the Apple ATI 5770 card have such functionality - could the fuzzy screen be a manifestation of an antipiracy function gone awry?  Sounds a bit paranoid, I know. 

  • NullUnit Level 1 (110 points)

    Note; this is not a graphics card issue, it's a cheap, non-compliant cable issue. I had the same problem for a couple months until I replaced some less expensive video cables with higher end cables. Problem hasn't occured in a year after upgrading cables.


    In one case I had an Apple Dual Link DVI cable going bad, while not cheap, replacing that cable solved the problem. Apple REALLY needs to have more than a 90 warranty on $100 parts.