Dell 5K monitor with nMP

Discussion in 'Mac Pro' started by ijonath, Feb 8, 2016.

  1. ijonath macrumors newbie

    Jan 2, 2016

    I have a nMP with twin D700 and a Dell monitor UP2414Q and I have severals issues with the wake up. Sometimes when i wake up my computer the screen stay black and i have no other solution than wait several minutes or reboot the computer to resolve the problem.
    So I am searching for a new screen and i am asking if the 5K Dell monitor have the same issue or work well ?

  2. netkas macrumors 65816

    Oct 2, 2007
    Casting MVC, he has both piece of hardware, except his nmp has d300
  3. edanuff macrumors 6502

    Oct 30, 2008
    The Dell UP2414Q 4K display had notorious wake-from-sleep problems with the Mac in particular, although even PC users experienced it.
  4. ijonath thread starter macrumors newbie

    Jan 2, 2016
    It's a probleme when you need to work. But what I am asking is if the problem appear only with the UP2414Q or if it appear with every 4K monitor and also with the 5K dell monitor ?
  5. scott.n macrumors 6502

    Dec 17, 2010
    When this happens, can you turn the monitor off and on using the power button, or is it completely unresponsive? I've seen it both ways. If the former then just toggling the power button usually wakes it up. But when it's completely unresponsive, the only fix I've figured out is to pull the power cable from the outlet, then plug it back in.

    This is with my Dell P2715Q and Mac Pro 5,1. I've seen it using a GTX 760, GTX 970, and flashed Radeon HD 7950. (Nvidia cards were unflashed.)
  6. ijonath thread starter macrumors newbie

    Jan 2, 2016
    For me the screen is completly unresponsive...
  7. Mikael S macrumors newbie

    Apr 25, 2015
    I dont have that issue on my setup.
    (D700 + Dell 5k). I do have an issue with lack of boot screen which I did not have a while ago. So thats something to figure out why that is..

    All in all im very happy with my setup despite lack of boot screen and other minor quirks..
  8. MacVidCards Suspended

    Nov 17, 2008
    Hollywood, CA
    Yes, my Dell 5K gets into weird "moods" where it won't respond to anything other than the classic "cord yank".
  9. edanuff macrumors 6502

    Oct 30, 2008
    The UP2414Q had consistent wake-from-sleep problems that were irregardless of OS or hardware. Early revs of Dell's P2415Q and P2715Q 4K monitors had a different wake-from-sleep problem that was intermittent and required the monitors to be unplugged (or connected to a power strip and toggled, which is what most owners end up doing). Some versions of OSX are more problematic with 4K monitors - no version prior to El Capitan works reliably with 4K (Yosemite has screen tearing and wake-from-sleep issues) and El Capitan 10.11.2 has a new wake-from-sleep problem that was fixed in 10.11.3. I don't have a Dell UP2715K 5K monitor but since it was introduced around the same time as the P2415Q/P2715Q, it wouldn't surprise me if it has the same lockup problem on it's some of its revs.
  10. netkas macrumors 65816

    Oct 2, 2007
    NMP can't display boot screen on that display, also nmp can't show bootscreen on 4k display, end of story.
  11. Mikael S, Feb 9, 2016
    Last edited: Feb 9, 2016

    Mikael S macrumors newbie

    Apr 25, 2015
    Boot screen (if you mean displaying the apple logo and progress bar during booting) most certainly has worked for me with my nMP and UP2715k display .

    Also, I often use the startup manager to boot into windows which has worked perfectly until some time ago.

    Like I said - I am struggling to understand why it does not work anymore since a few months back.

    When it did work it displayed the startup manager and boot "Apple" logo in 2560p resolution.
  12. edanuff macrumors 6502

    Oct 30, 2008
    I'm not sure about 5K, but when you see a bootscreen with a 4K monitor on a nMP, it means you're running in either MST mode or 30Hz mode. In fact, the workaround for Dell's newer 4K monitors (P2415Q/P2715Q) to get the bootscreen is to force this by hitting the display's menu button and going to Menu -> Display -> MST -> Secondary, which puts the display into 30Hz MST mode and lets you get the bootscreen back so you can option-boot. I think the 5K display is always in MST mode so maybe that's not necessary for it.
  13. AJClayton macrumors 6502


    Jan 9, 2007
    Dorset, England
    I have to disagree with your first point. I have a 4K LG 31MU97 connected to my nMP running the latest version of OS X El Stupid Name. When I boot, I see the Apple logo and progress bar briefly before I get to the login screen. Alternatively, I'm able to select boot options on startup (e.g. Startup Manager).

    My screen is SST and is running at 60Hz.

    I suppose what I'm saying is that with correct drivers (which I guess Apple have for the LG) 4K (and one would imagine 5K) displays can behave like their more traditional ancestors.

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