Previous 1 2 3 4 Next 758 Replies Latest reply: Sep 28, 2013 5:21 AM by th.effing Go to original post
  • Daniel M. Gattermann Level 2 Level 2 (175 points)
    Good point.

    I've now set gfxCardStatus to use "power source-based switching" and forcing the integrated graphics on battery power and the discrete when plugged in.
    (This is also useful because some apps force the discrete GPU [even on battery power] unless you use gfxCardStatus to force the integrated graphics: http://codykrieger.com/gfxCardStatus/faq#applications).

    Graphics switching is also disabled in the Energy Saver preferences. I'll report back after the next black screen :/
  • Daniel M. Gattermann Level 2 Level 2 (175 points)
    Just had a switch to black. Forcing the discrete GPU didn't help.
  • TJCacher Level 1 Level 1 (5 points)
    Link to other thread about this issue:
    http://discussions.apple.com/thread.jspa?threadID=2766186

    I originally posted in the other thread. This one seems to be the most active, so I'll reply here as well.

    Early 2009 MBP 17" OS X Snow Leopard 10.6.6 -> 24" Cinema Display
    No Flickering or black screens

    Early 2011 MBP 17" OS X Snow Leopard 10.6.6 -> 24" Cinema Display
    Frequent flickering or graphical glitching lasting < 1 second per incident.

    I installed BootCamp on the 2011 MBP (Windows 7 Ultimate 64-bit) and am posting from that platform using my 24" Cinema Display.

    It's been about 10 minutes now, and I noticed one graphical glitch just a minute ago as I was typing this post. However, I must say that I'm experiencing far, far fewer incidences of graphical glitching using Windows on this platform.

    I'm thinking the problem may be device-driver related, where the Windows BootCamp driver for the AMD Radeon chipset is somehow less vulnerable to this problem than the driver software Apple is using under OS X.

    Note: It's now been about 15 minutes of use, and, so far, I have only seen the one graphical glitch. Definitely far, far less frequent than on OS X.
  • minpinmax Level 1 Level 1 (0 points)
    Count me in as well.

    If is a very random occurrence.

    I can go a long time without it happening and then it could
    happen 3 times in 10 minutes.

    I tried to file a bug report with Apple, but couldn't get that link to work.
  • th.effing Level 1 Level 1 (0 points)
    Me too, I have this problem with a 24" LED Cinema Display (bought November 2009) and 2011 13" i5 Macbook Pro.

    Message was edited by: th.effing
  • Os Level 1 Level 1 (15 points)
    Me too. Just switched to an Early 2011 MacBook Pro and my previously fine 24" LED Cinema Display now randomly goes black every few seconds.
  • iFrodo Level 1 Level 1 (40 points)
    Apparently it's not just a video driver issue, as I've tried a bunch of other screen, including an HDTV 1080p and a 22" screen, and a bunch of others NONE have this issue. ONLY the ACD 24" have it (maybe other Apple screen, I don't know).

    Considering that and the fact that it also affects some other Mini DP Apple computers like ones using NVidia 9400M, the fix will probably come in form on a ACD 24" firmware update and maybe coupled with a graphics drivers update, but not so sure.
  • hypo luxa Level 1 Level 1 (0 points)
    Yeah, I'm having the issue as well. I have a 15" MBP with the 2.2 GHz Sandy Bridge. My 24" cinema display goes black and stays black. It doesn't really flicker. I have to disconnect all power from the outlet to the cinema display and power off the notebook. Once I do that and reconnect everything, it works. If the machine goes to sleep, the cinema display will stay dark and all of the windows that were on the display move to my macbook pro's screen. What a nice bug, eh? Apple please send out a fix!
  • El Presidente Level 2 Level 2 (415 points)
    Does this also affect the 27" display. If not then it means Apple only tested the new laptops with the 27" model and neglected the 24" which is a massive oversight. I'm pretty much considering returning the laptop and going back to Early 2009 model at this point.
  • Kyle O'Bannon Level 1 Level 1 (25 points)
    Well, it appears Apple is aware of the issue. An Apple Discussions Host called me a few days ago after seeing one of my recent posts. He offered to swap my MacBook Pro for a new one so Apple Engineers can get their hands on a known bad unit. I shipped it off last night and anxiously await my replacement.
  • iFrodo Level 1 Level 1 (40 points)
    I'll personally bring my 24" ACD back for repair (still under warranty) as the tests I conducted are confirming that the screen itself an issue.

    Indeed, I have this issue not only on my 15" MBP 2011, but also on a 2009 Mac Mini and a MacBook Unibody. Meanwhile, when using the USB Audio (integrated speakers of the screen), if I play music for more than about 20 minutes, the sound start to crackle and stop until I unplug and plug back the USB cable of the ACD 24". Also NONE of the other screen have tried have showed the flicker issue, even with my 2011 MBP.

    SO in my case at least, it seems that the 2011 MBP is working just fine, as I have no issue whatsoever on both a 22" HDTV and a 40" HDTV connected in HDMI using a Mini DP <-> HDMI converter. Some MBP may have issues themselves, but definitely not mine, but my ACD 24" do have problems that need to be fixed, that's for sure.
  • helloniklas Level 1 Level 1 (0 points)
    I have the same problem with my new 17" MacBook Pro and 24" cinema display. Called Apple and they are awning out a new unit. Great service I have to say. Hope the new one will work better though.
  • BZ Level 1 Level 1 (25 points)
    BTW: I am having this issues on my new MacBook.
  • El Presidente Level 2 Level 2 (415 points)
    Has anyone been able to pin point whether this is a laptop issue or a display one?
  • digitalroberto Level 1 Level 1 (0 points)
    Since roughly January my 2009 MBP 15" is experiencing the same issue. Occurs roughly once to three times a day. New MPB is due to arrive next week, looking forward to seeing (and hoping it doesn't) if it continues to occur with that one.
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