Mac Pro Late 2013 and Samsung 4k monitor problem

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? 😐

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.

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

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.. 😠

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.

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....

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.

ok,thanks. Sorry to ask again. Two questions:

1. What Brand is your "old" DP-2-MiniDP cable that you are using?

2. The MP with D400 is only €500 more than the MBP with nvidia graphics though. So what would you advice, an MBP or a MP?

Howdy all, I'm having a bear of a time trying to get this optimized. I've been able to get only 40Hz max with the

Samsung U28D590D on a late 2013 27" iMac via a mini displayport to displayport cable.

I've followed the steps outline in many of the posts about reseting SwitchResX, adding the new EDID and then

creating the custom resolution. I've been modifying the files in DisplayVendorID-4c2d, and there are currently

two files in that directory (DisplayProductID-4255 DisplayProductID-b80) and I've tried to apply the EDID to both,

together and individually.

I'm wondering if this might be a cable issue? I got the cable from Monoprice (via Amazon) and I can't find

anywhere that it specifies DP 1.2 compliant.

I can get full resolution under windows 7.

Any ideas of things to try?

Thanks,

Scott

Thanks for the replies, Daniel and joevt. I think I was a little misleading in my info about it working in windows. I can definitely get full resolution in Windows, but not in bootcamp on the iMac. Full res was on a non Apple hardware hackintosh/windows combo. Sorry about that.

I just booted into Windows on the iMac and can only see the same resolution of the cinema display (2560x1440). Samsung does have some "driver" on their website for this monitor, but I don't see that it actually does anything.

Is this enough of the EDID info?

-----------------------------------------------------

------------------- RAW DATA ------------------------

-----------------------------------------------------

0 1 2 3 4 5 6 7 8 9 A B C D E F

-----------------------------------------------------

0 | 00 FF FF FF FF FF FF 00 4C 2D 80 0B 00 00 00 00

1 | 34 17 01 04 B5 3D 23 78 3A 5F B1 A2 57 4F A2 28

2 | 0F 50 54 BF EF 80 71 4F 81 00 81 C0 81 80 A9 C0

3 | B3 00 95 00 D1 00 4D D0 00 A0 F0 70 3E 80 30 20

4 | 35 00 5F 59 21 00 00 1A 56 5E 00 A0 A0 A0 29 50

5 | 30 20 35 00 5F 59 21 00 00 1A 00 00 00 FD 00 38

6 | 4B 1E 86 36 00 0A 20 20 20 20 20 20 00 00 00 FC

7 | 00 55 32 38 44 35 39 30 0A 20 20 20 20 20 01 9F

-----------------------------------------------------

0 1 2 3 4 5 6 7 8 9 A B C D E F

-----------------------------------------------------

0 | 02 03 0C F0 23 09 07 07 83 01 00 00 02 3A 80 18

1 | 71 38 2D 40 58 2C 45 00 5F 59 21 00 00 1E 00 00

2 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

3 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

4 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

5 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

6 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

7 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 97

-----------------------------------------------------

< 00FFFFFF FFFFFF00 4C2D800B 00000000 34170104 B53D2378 3A5FB1A2 574FA228 0F5054BF EF80714F 810081C0 8180A9C0 B3009500 D1004DD0 00A0F070 3E803020 35005F59 2100001A 565E00A0 A0A02950 30203500 5F592100 001A0000 00FD0038 4B1E8636 000A2020 20202020 000000FC 00553238 44353930 0A202020 2020019F 02030CF0 23090707 83010000 023A8018 71382D40 582C4500 5F592100 001E0000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000097 >

-----------------------------------------------------

{ 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x4C, 0x2D, 0x80, 0x0B, 0x00, 0x00, 0x00, 0x00, 0x34, 0x17, 0x01, 0x04, 0xB5, 0x3D, 0x23, 0x78, 0x3A, 0x5F, 0xB1, 0xA2, 0x57, 0x4F, 0xA2, 0x28, 0x0F, 0x50, 0x54, 0xBF, 0xEF, 0x80, 0x71, 0x4F, 0x81, 0x00, 0x81, 0xC0, 0x81, 0x80, 0xA9, 0xC0, 0xB3, 0x00, 0x95, 0x00, 0xD1, 0x00, 0x4D, 0xD0, 0x00, 0xA0, 0xF0, 0x70, 0x3E, 0x80, 0x30, 0x20, 0x35, 0x00, 0x5F, 0x59, 0x21, 0x00, 0x00, 0x1A, 0x56, 0x5E, 0x00, 0xA0, 0xA0, 0xA0, 0x29, 0x50, 0x30, 0x20, 0x35, 0x00, 0x5F, 0x59, 0x21, 0x00, 0x00, 0x1A, 0x00, 0x00, 0x00, 0xFD, 0x00, 0x38, 0x4B, 0x1E, 0x86, 0x36, 0x00, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xFC, 0x00, 0x55, 0x32, 0x38, 0x44, 0x35, 0x39, 0x30, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0x9F 0x02, 0x03, 0x0C, 0xF0, 0x23, 0x09, 0x07, 0x07, 0x83, 0x01, 0x00, 0x00, 0x02, 0x3A, 0x80, 0x18, 0x71, 0x38, 0x2D, 0x40, 0x58, 0x2C, 0x45, 0x00, 0x5F, 0x59, 0x21, 0x00, 0x00, 0x1E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x97 }

Also, interesting tidbit, I did an original EDID dump before I started messing with all this. I just did another one to get the info above. A diff shows that they do have differences. I would imagine some of the resolutions, etc, but it seemed that the hex data was different too. Is that normal?

To your other point about Thunderbolt 2 or DisplayPort 1.2, I just checked the specs. It looks like it definitely doesn't have Thunderbolt 2 or DisplayPort 1.2 capabilities. Does that mean I can never expect > 40Hz?

Thanks again.

You pasted 3 copies of the EDID info. They are all the same as other people's EDID. The hex data shouldn't be different unless the serial numbers in the EDID are different but I think all the Samsung monitors don't have a serial number in the EDID.

For Boot Camp, you may need to download the latest NVIDIA graphics driver from NVIDIA to get 4K @ 30 Hz.

Anyway, you won't be able to get 4K 60 Hz on your iMac unless you buy an expensive ($1000?) thunderbolt to PCI express chassis with a video card.

http://www.journaldulapin.com/2013/08/24/a-thunderbolt-gpu-on-a-mac-how-to/

http://forum.techinferno.com/diy-e-gpu-projects/6689-%5Bguide%5D-2013-15-macbook -pro-gtx780ti%4016gbps-tb2-sonnet-echo-express-iii-d-win8.html

scott,

Sorry for my misread. It looks like the iMac doesn't have thunderbolt 2 yet, so you're restricted to displayport 1.1 unfortunately. You could do 60Hz with picture-by-picture mode using DP + a mDP->HDMI adapter (or two mDP->HDMI adapters), though the computer will see as two displays, and it uses both your thunderbolt ports (though you could put accessiories that have a thunderbolt passthrough inbetween)

My 2012 rMBP has the same limitation unfortunately, and while I was hoping that a DP connection with no thunderbolt would allow it to use all the datalanes, it looks like the thunderbolt 1 setup doesn't allow that. 😟

Glad 10.10 finally has the fixed drivers!

PB_NB and others who installed 10.10,

Is the system overall usable/stable? Have any of you tried 3D programs? If not, what kind of software?

I just want to know if the rest of the OS is in good shape for everyday use, as I have read elsewhere that the UI had some visual glitches going on...

TYIA.

Cinema 4D R15 so far is working well for me. So is the latest creative cloud and even the older Final Cut Suite. But there are slight visual glitches that occur in the finder window every now and then. Also, Safari seems to have some slowdown issues when playing video. Other than that, it's good.

This is the issue I have from the beginning with my Samsung monitor, even if everything else is working fine. Sometimes I have to replug monitor just to get signal when waking up computer, My machine is Mac Pro 2013 with D300 graphic.