Occaiosnal "snow" on monitor?

Discussion in 'Mac Pro' started by xgman, May 30, 2011.

  1. xgman macrumors 601


    Aug 6, 2007
  2. Cindori macrumors 68040


    Jan 17, 2008
    its an ati driver thing, should only happen on wake from sleep and such things
  3. GlynJones macrumors 6502

    Jun 15, 2005
    I get it on my Mac Pro 1,1 with ATI HD 4870. Only when the monitor is woken up. It only does it for a few seconds though then then desktop comes back on.

    My Mac Pro does not go to sleep but the display does.
  4. handheldgames macrumors 6502a


    Apr 4, 2009
    Same x2 both on Dell 3007wfp-hc displays. One on dl dvi. The other on mdp --> dl dvi using apples adapter. Dl dvi happens much more often.
  5. elvisizer macrumors 6502

    May 29, 2003
    San Jose
    I wouldn't blame that on ati- I've had that happen from time to time with an nvidia 8800gt, ati 4870, nvidia gtx 285, and an ati 5870.
  6. galstaph macrumors 6502a


    Jul 24, 2002
    The Great White North Eh
    had the same issue since I got my 2009 back in march 2009 both on my 120gt and my new 5870 (albeit the 5870 does it less).... there was eventually going to be a fix in an update for it... or so applecare told me... 2 years and still waiting :rolleyes:
  7. handheldgames macrumors 6502a


    Apr 4, 2009
    Ok... (rolling up sleves) I'm fed up with this issue. (Crawling under desk). I'm going to get to the bottom of this. (Unhooking Dell 3007 wfp-hc from the mac pro to a flashed 4870 1GB - residing in a Windows 7 PC) .

    If it's an issue with the card or the monitor... It will happen on the PC. If not.. the source of the issue is kind of obvious... I'll be watching the French Open on the Tennis Channel. Will report my findings :cool:
  8. Tibbar macrumors member

    Jan 28, 2007
    It's happened to me with both an Nvidia GeForce GT 120 and ATI Radeon HD 2600XT on separate Mac Pros. The problem goes away as soon as you toggle input sources on the monitor (e.g. switch to VGA and then back to DVI).
  9. handheldgames macrumors 6502a


    Apr 4, 2009
    This is SMELLING like a OS X issue!!! Have not encountered the Static Screen of Death 1x with the Dell 3007wfp-hc display attached to the Windows Media Center PC all evening. By this time, I would have lost sync at least 2-3x. Remember - this is a 4870 1GB flashed with Apple firmware. This card had sync issues on the MacPro. It's not a cable issue either.... Sooo....

    MacPro OS/X Specific Behavior:
    DVI-DL port: Monitor looses sync and causes the image to be intermixed with a static image. Happens within minutes of the machine returning from sleep. Happens more often, if the image on the screen is not changed and remains static. Can be corrected powering off/on display.

    MDP -> Apple MDP->DVI-DL Adapter: On occasion after wake from sleep, will "pulse" to static image every 20 seconds or so. Can be corrected by unplugging/plugging DVI cable into MDP/DVI-DL adapter.

    Windows PC Behavior:
    No issues to report. I feel cheated!
  10. initialsBB macrumors 6502a

    Oct 18, 2010
    Wirelessly posted (iPhone: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5)

    I get this with a Samsung f2380m & Radeon 5770 when the monitor wakes from sleep. Most times a flick of the on/off switch will work, but sometimes I have to physically unplug the DVI cable from the 5770... Always thought it was a monitor issue, but now I'm not so sure !
  11. handheldgames, Jun 1, 2011
    Last edited: Jun 1, 2011

    handheldgames macrumors 6502a


    Apr 4, 2009
    This is something AMD needs to fix in their drivers and EFI firmware. Apparently the legacy code base has been broken since the 2600xt.

    By my testing, it's clearly not the video card. It's definitely not the cable. And apparently, it's not the monitor. Seems like a basic EFI/driver issue that could easily be resolved....
  12. emaja macrumors 68000

    May 3, 2005
    Chicago, IL
    Nope. It has happened to me on my last three MBP's - only the one I am currently using has ATI graphics.

    That's been my experience too.

    It only happens every once in a while and all I have to do is turn the monitor off then on again. I have my display set to sleep, but not my Mac, so it is not a sleep issue with OS X.

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