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Q: Mac Pro Late 2013 and Samsung 4k monitor problem

I have the new Samsung 28" 4k screen (U28D590D) and it has tearing along the right edge when used with displayport. Any way to fix that? I tried different cables (all DisplayPort 1.2 complient) to be sure and have narrowed the issue to the Mac Pro. The HDMI works fine tho only @30hz so is a bit laggy in normal interaction. There is no way to turn on Multi-stream as indicated and I hope it isnt that this screen will never work.

Mac Pro, OS X Mavericks (10.9.2), Dual Fire Pro D700

Posted on Apr 11, 2014 2:12 PM

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Q: Mac Pro Late 2013 and Samsung 4k monitor problem

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  • by Poyda,

    Poyda Poyda Jul 15, 2014 1:25 PM in response to titan66
    Level 1 (0 points)
    Jul 15, 2014 1:25 PM in response to titan66

    I've had success using a C2G branded cable that I bought from NewEgg.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16812793546

     

    Hope this helps you

  • by pacioccone,

    pacioccone pacioccone Jul 17, 2014 4:30 PM in response to titan66
    Level 1 (0 points)
    Jul 17, 2014 4:30 PM in response to titan66

    Why the image is showing up upside down is beyond me.

     

    But here they are. Be in touch if you'd like them. No profit here. Just helping out a fellow community member with the same 4K issue.

     

    <Email Edited by Host>

     

    cables.jpg

  • by titan66,

    titan66 titan66 Jul 15, 2014 4:52 PM in response to pacioccone
    Level 1 (0 points)
    Jul 15, 2014 4:52 PM in response to pacioccone

    Thanks pacioccone for the offer, but I think based on the information I received today from Accell (below for those interested), I'm going to hang tight here and hope to be seeing it in stock soon.

     

    Thank you for contacting Accell. The demand for B143B-007J has far exceeded our expectation and it currently backordered. We have rushed shipments from our factory and should arrive in about 2 weeks. Once received it will be available on our website http://www.accellcables.com/products/ultraav-mini-displayport-to-displayport-1-2 -cable. We apologize for the wait.

     

    Sincerely,
    Accell Service Team

     

  • by chriskuta,

    chriskuta chriskuta Jul 15, 2014 6:43 PM in response to Poyda
    Level 1 (0 points)
    Jul 15, 2014 6:43 PM in response to Poyda

    Poyda wrote:

     

    You need a good Mini DisplayPort to DisplayPort 1.2 cable AND you need to use the custom EDID / timings that have been discussed from page 6 onwards in this thread.

     

    Thanks for confirming that as I saw the responses about cables and got excited

    Alas you still need to ***** around like you're on Linux or some such OS.

     

    It seems that this isn't even solved in Yosemite Beta.

     

     

    <Edited by Host>

  • by pacioccone,

    pacioccone pacioccone Jul 16, 2014 3:58 AM in response to titan66
    Level 1 (0 points)
    Jul 16, 2014 3:58 AM in response to titan66

    All good, mate! I hope you enjoy the monitors with the new cables.

  • by pacioccone,

    pacioccone pacioccone Jul 16, 2014 5:09 AM in response to chriskuta
    Level 1 (0 points)
    Jul 16, 2014 5:09 AM in response to chriskuta

    I spoke with Apple Care who had a response from engineering regarding this thread and the bugs referenced in the thread. Engineering is putting this back on Samsung and stating this has nothing to do with Apple. Why would this be Samsung's issue?

  • by Daniel Hartman1,

    Daniel Hartman1 Daniel Hartman1 Jul 16, 2014 5:22 AM in response to pacioccone
    Level 2 (450 points)
    Jul 16, 2014 5:22 AM in response to pacioccone

    I guess maybe they thing samsung's EDID data is bad?  But blaming on samsung seemsa  bit implausible given it works fine on a nvidia GTX 680 or under windows with ATI cards.


    I thought I saw a macrumors post that the latest 10.10 DP finally fixed this, but it was in a long thread and not sure I could find again. 

  • by Terscion,

    Terscion Terscion Jul 16, 2014 6:32 AM in response to Daniel Hartman1
    Level 1 (0 points)
    Jul 16, 2014 6:32 AM in response to Daniel Hartman1

    Most people on this forum seem to be using the Samsung U28D590D or the Asus PB287Q, but since their release, a few other 4K monitors are on the market.  Was wondering if anyone here has any experience with using the following monitors with the new Mac Pro?

     

    Viewsonic VX2880ml

    Philips Brilliance 288P6LJEB

    AOC U2868PQU

    Lenovo Thinkvision Pro 2840m

  • by joevt,

    joevt joevt Jul 16, 2014 1:19 PM in response to Terscion
    Level 1 (0 points)
    Jul 16, 2014 1:19 PM in response to Terscion

    pacioccone wrote:

     

     

    I spoke with Apple Care who had a response from engineering regarding this thread and the bugs referenced in the thread. Engineering is putting this back on Samsung and stating this has nothing to do with Apple. Why would this be Samsung's issue?

     

    It's not a Samsung issue if it works in Windows. Has Engineering or anyone in this thread tried one of these 4K 60 Hz SST monitors in Boot Camp on the same Mac? If it works in Windows but not in Mac OS X, then it's a Mac OS X driver problem.

     

    Terscion wrote:

     

    Most people on this forum seem to be using the Samsung U28D590D or the Asus PB287Q, but since their release, a few other 4K monitors are on the market.  Was wondering if anyone here has any experience with using the following monitors with the new Mac Pro?

     

    Viewsonic VX2880ml

    Philips Brilliance 288P6LJEB

    AOC U2868PQU

    Lenovo Thinkvision Pro 2840m

     

    I can't tell if those monitors are SST or MST. The Samsung U28D590D or the Asus PB287Q are SST. Any SST monitor should just work (except for this AMD issue) since they are like normal monitors except with higher bandwidth. I don't know how MST monitors work in Mac OS X - whether or not Apple has to add support for each MST monitor, or if the driver can detect that the monitor requires MST and work with that. If Apple needs to add support for each MST monitor, then maybe we can figure out how that's done and add support ourselves, or maybe the EDID can be edited to make it appear as a supported MST monitor.

  • by chriskuta,

    chriskuta chriskuta Jul 16, 2014 5:13 PM in response to joevt
    Level 1 (0 points)
    Jul 16, 2014 5:13 PM in response to joevt

    The engineer clearly doesn't have all the information. I'm using my U28D590 right now on my Late 2013 Mac Book Pro and it works perfectly even using an older mini display port to display port cable. Its an AMD driver / signal issue. The MBP puts out a clean 3840x2160 @ 60Hz horz. 133.3khz vert. and it was like a quarter the price of the MP..

  • by romanheym,

    romanheym romanheym Jul 16, 2014 9:57 PM in response to chriskuta
    Level 1 (0 points)
    Jul 16, 2014 9:57 PM in response to chriskuta

    II'm using samsung monitor with new Mac Pro with D300 graphics and it also works fine. No artifacts on the screen in 60hz - no need to modify edid file. It could be actually AMD problem with the drivers. Of course for us is all Apple who is to blame. But for sure I wouldn't say it's samsung fault.

  • by joevt,

    joevt joevt Jul 17, 2014 12:47 AM in response to chriskuta
    Level 1 (0 points)
    Jul 17, 2014 12:47 AM in response to chriskuta

    chriskuta wrote:

     

    The engineer clearly doesn't have all the information. I'm using my U28D590 right now on my Late 2013 Mac Book Pro and it works perfectly even using an older mini display port to display port cable. Its an AMD driver / signal issue. The MBP puts out a clean 3840x2160 @ 60Hz horz. 133.3khz vert. and it was like a quarter the price of the MP..

     

    Right, the MBP uses either Intel integrated or NVIDIA graphics (isn't external video always using NVIDIA graphics?). Since the monitor works with that, then there's a problem with the AMD graphics or with the AMD drivers.

     

    romanheym wrote:

     

    II'm using samsung monitor with new Mac Pro with D300 graphics and it also works fine. No artifacts on the screen in 60hz - no need to modify edid file. It could be actually AMD problem with the drivers. Of course for us is all Apple who is to blame. But for sure I wouldn't say it's samsung fault.

     

    Another user in this thread also reported no issue with the D300. Noone has reported an issue with the D300. So it's either a problem with the D500/D700 or the AMD driver for the D500/D700. We need to see some tests with Boot Camp.

     

    There's a possibility that the NVIDIA graphics is working better than standards to allow working with a monitor that doesn't meet standards - but that's probably crazy talk and the engineer shouldn't be so lazy trying to track down this problem.

  • by dmolrub,

    dmolrub dmolrub Jul 20, 2014 1:31 AM in response to joevt
    Level 1 (0 points)
    Jul 20, 2014 1:31 AM in response to joevt

    Hello all,

     

    I've just managed to get Windows 8.1 installed on my nMP with D700 (which wasn't easy btw), and tried to check the resolution/timings on the Windows platform, I get stuck at 2560x1440@60Hz, no other option above that in the Adjust Resolution section in Control Panel. Anyone managed to get 3840x2160 on Windows? Or any ideas on how to change it?

    I have googled around for an hour with no luck....

  • by joevt,

    joevt joevt Jul 20, 2014 1:24 PM in response to dmolrub
    Level 1 (0 points)
    Jul 20, 2014 1:24 PM in response to dmolrub

    dmolrub wrote:

     

    Hello all,

     

    I've just managed to get Windows 8.1 installed on my nMP with D700 (which wasn't easy btw), and tried to check the resolution/timings on the Windows platform, I get stuck at 2560x1440@60Hz, no other option above that in the Adjust Resolution section in Control Panel. Anyone managed to get 3840x2160 on Windows? Or any ideas on how to change it?

    I have googled around for an hour with no luck....

     

    Did you install the latest AMD Catalyst drivers (14.4)?

    http://support.amd.com/en-us/download/desktop?os=Windows+7+-+64#amd-catalyst-pac kages

     

    On the same page is listed a beta driver (14.7 Beta). The beta driver mentions the following possibly relevant issue (AOC is different from the ASUS and Samsung displays discussed in this thread):

    http://support.amd.com/en-us/kb-articles/Pages/latest-catalyst-windows-beta.aspx

     

    • Collaboration with AOC has identified non-standard display timings as the root cause of 60Hz SST flickering exhibited by the AOC U2868PQU panel on certain AMD Radeon™ graphics cards. A software workaround has been implemented in AMD Catalyst 14.7 RC driver to resolve the display timing issues with this display. 
      • Users are further encouraged to obtain newer display firmware from AOC that will resolve flickering at its origin.
      • Users are additionally advised to utilize DisplayPort-certified cables to ensure the integrity of the DisplayPort data connection.​​

    This suggests that there might be a problem with the displays (at least for the AOC display). So try the 14.4 driver first and if you see flickering, go to the 14.7 driver. If the flickering goes away, then it would be nice to know the workaround they used to see if it's different than the work around we're using in Mac OS X.

  • by PB_NB,

    PB_NB PB_NB Jul 21, 2014 3:57 PM in response to joevt
    Level 1 (0 points)
    Jul 21, 2014 3:57 PM in response to joevt

    Hi joevt,

     

    Is it possible to make a data line for the override file that is actually 60 Hz. for the Samsung 4k monitor? I have been using the 50 Hz file for a while and it has been much better than the 56 Hz which causes the picture overlap on the right hand side but still a little lagging. 57 Hz also causes the same overlap but it appears to be thinner to the edge. The monitor seems to be okay going past 57 Hz and so does the nMP (D500 model). I have just switched over to the 54 Hz. now and the picture is getting better all the time.

     

    Thanks,

    PB

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