11 Replies Latest reply: Jun 24, 2007 6:45 PM by blayzay
scolainsola Level 1 Level 1 (10 points)
The only way I can get it to work right is when I drop the resolution down to 1024x768.

Here is my setup:

Mac Pro
ATI x1900 xt
Apple Cinema Display (20") + Dell Monitor (20")
6gb RAM

ACD works like a charm, Dell monitor flickers. Tried switching ports, running dell alone - same result.

iMac 2.0 ghz / MacBook 2.0 ghz / Mac Mini 1.66 ghz (Intel) / Mac Pro 2.66 ghz, Mac OS X (10.4.9)
  • scolainsola Level 1 Level 1 (10 points)
    Quick follow-up:

    Works fine in boot camp (with windows xp pro).

    I also tried resetting the PRAM - no luck.

    This has to be an OS X issue.
  • blayzay Level 3 Level 3 (630 points)
    First to start with welcome Scoliansola, and check this out,i have Dell monitor at 1280x1024.
    therefore i think its your monitor thats at fault and not OSX it seems like its had enough or its time for a repair.

    ATI Radeon X1900 XT:
    Chipset Model: ATY,RadeonX1900
    Type: Display
    Bus: PCIe
    Slot: Slot-1
    VRAM (Total): 512 MB
    Vendor: ATI (0x1002)
    Device ID: 0x7249
    Revision ID: 0x0000
    ROM Revision: 113-A52027-140
    EFI Driver Version: 01.00.140
    Displays:
    DELL 1906FP:
    Resolution: 1280 x 1024 @ 75 Hz
    Depth: 32-bit Color
    Core Image: Supported
    Main Display: Yes
    Mirror: Off
    Online: Yes
    Quartz Extreme: Supported
    Rotation: Supported
    Display:
    Status: No display connected

    Fr. BlayZay.
  • scolainsola Level 1 Level 1 (10 points)
    Well explain this - it works fine in windows with the same card and same monitor. Also, the monitor worked fine with the old Nvidia card that came standard with the mac pro. Finally, the monitor is only 5 days old - so I doubt there is anything wrong with it.

    Check it out:

    Chipset Model: ATY,RadeonX1900
    Type: Display
    Bus: PCIe
    Slot: Slot-1
    VRAM (Total): 512 MB
    Vendor: ATI (0x1002)
    Device ID: 0x7249
    Revision ID: 0x0000
    ROM Revision: 113-A52027-140
    EFI Driver Version: 01.00.140
    Displays:
    Cinema:
    Display Type: LCD
    Resolution: 1680 x 1050
    Depth: 32-bit Color
    Core Image: Supported
    Main Display: Yes
    Mirror: Off
    Online: Yes
    Quartz Extreme: Supported
    Rotation: Supported
    DELL E207WFP:
    Resolution: 1024 x 768 @ 75 Hz
    Depth: 32-bit Color
    Core Image: Supported
    Mirror: Off
    Online: Yes
    Quartz Extreme: Supported
    Rotation: Supported
  • blayzay Level 3 Level 3 (630 points)
    The best advice from me to you is to take both the monitor and computer to the store, hope-ing it was a store, or to whom you made the purchase from for the monitor and try another monitor, and see what happen, then you will know for sure whats what, even though its new it does,nt means its in a great condition, might works with on windows but not osx that sounds like trouble, hope all work.
  • scolainsola Level 1 Level 1 (10 points)
    I purchased it from the Apple Store (online) so there really isn't anywhere to take it to. I guess I will ask for a refund.
  • Michaelworks Level 3 Level 3 (695 points)
    Any local Apple store will gladly help you with your on-line purchased item. It's in the rule book.

    Michael
  • blayzay Level 3 Level 3 (630 points)
    Thanks for pointing that out Micheal.W so i guess thats even better, since they were both fr. Apple, therefore its best to book an apointment for both the computer and display.

    Fr.BlayZay.
  • scolainsola Level 1 Level 1 (10 points)
    I appreciate both of your help, but in Louisiana there is no Apple Store - just a Comp USA. I have decided to return the card as I really believe this is an OS X compatability issue because in boot camp (windows XP) the card works perfectly with both monitors.
  • blayzay Level 3 Level 3 (630 points)
    If thats the case suite yourself Scolainsola, however it works fine for me and others, unless again its a ATI x 1900 graphic-card you have was,nt purchase fr. Apple, then its a different card and not the same card that apple sells that one is for windows and not for mac.

    Fr. BlayZay.
  • Stephen Hope1 Level 1 Level 1 (15 points)
    I have developed this problem recently on my Mac Pro with two Dell 2407s. The screen goes black on each then comes back to life. The Dell's report no input when they go black.

    As I also run Windows XP under BootCamp on the mac Pro I was able to confirm this WAS NOT happening under Windows XP so was able to rule out hardware as the cause.

    I didn't find an answer to the problem online so called Apple Support.

    They had me move the Desktop Folder in my Users\'username'\Library\Caches folder onto the Desktop and then do the same with the com.apple.desktop.plist preferences file from the users\'username'\Library\Preferences folder.
    Then restart the computer.

    So far it seems to have fixed the problem. They indicated the files moved to the desktop could be deleted as OSX generates new preference files when restarted if it can't find the originals in the correct place.

    I hope this helps.
  • blayzay Level 3 Level 3 (630 points)
    Well done, i am happy to hear your back on track Stephen Hope1

    Have fun!

    Fr.BlayZay.