Mac Pro Late 2013 and Samsung 4k monitor problem

Have you tried posting in the MacBook laptop forum? This is the Mac Pro desktop forum.

ukun9113 wrote:

Hey guys,

I'm wracking my brain trying to figure out how to get my Samsung UHD monitor to work at native resolution on my rMBP early 2013, the one with the Nvidia 650m. I've tried everything everyone has suggested and I just can't get it past 2560x1440 even with the accel mini display port to display port cable and running 1.2 display port. Please help as I love the monitor and really want to use it to it's fullest potential!

Thanks in advance!

ukun9113,

Your model doesn't have thunderbolt 2/displayport 1.2, so it can't support 60Hz operation. But it should work at 30Hz - I have a 2012 model w/ 650m was driving the samsung while my Mac Pro was down for a reinstall. Probably makes more sense to post to the laptop forum here though -- or one of the threads at macrumors (don't have links offhand, but I've posted to a few my results).

Trace --

I thought i would check in to see if Apple was able to get back to you on any update? Cheers and happy friday!

Hi joevt, could you help me with product & Vendor ID based on this EDID dumb for my Phillips 288P:

IODisplayEDID" = <00ffffffffffff00410cd7089500000010180104a53e22783a5525a1574fa0280f5054bd4b00d1 c081808140950f9500b30081c0010150d000a0f0703e8030588a006d552100001a023a801871382d 40582c45006d552100001e000000fc005068696c697073203238385036000000fd0017501ea03c01 0a20202020202001b3020323f44b010203040590111213141f23090707830100006a030c00300000 78200000023a80d072382d40102c96806d5521000018023a801871382d40582c96006d5521000018 04740030f2705a80b0588a006d552100001a011d00bc52d01e20b82855406d552100001e00000000 0000000000000000000000000000000080>

Many thanks advance - Kim

kim.bjoern wrote:

Hi joevt, could you help me with product & Vendor ID based on this EDID dumb for my Phillips 288P:

IODisplayEDID" = <00ffffffffffff00410cd708...>

Many thanks advance - Kim

DisplayVendorID-410c/DisplayProductID-8d7

Made week 16 of 2014

Monitor name: Philips 288P6

Vendor id is hex digit 17 to 20. Product id is hex digit 21 to 24 with the two pairs of hex digits reversed because it's little endian. The vendor id is not little endian because the bits represent letters of the alphabet (three 5 bit numbers):

410c = 0100000100001100 = 0 10000 01000 01100 = 16, 8, 12 = PHL

vendorid=$((0x410c))
perl -e "printf \"%c%c%c\",$(((vendorid>>10&31)+64)),$(((vendorid>>5&31)+64)),$(((vendorid&31)+64))"
PHL

SwitchResX also shows the product id and vendor id.

What do you want to do with the information?

Many thanks for your time joevt. I did have this info - but should have asked more precisely:

I've been using some of the other override files shown in this discussion, and I have the structure and file-name correct.

/System/Library/Displays/Overrides/DisplayVendorID-410c/DisplayProductID-8d7

I was asking for the correct data (integer?) in the override file, as it currently displays the Samsung info.

<key>DisplayProductID</key>

<integer>2944</integer>

<key>DisplayVendorID</key>

<integer>19501</integer>

Thanks again - Kim

Ahh! hex to decimal?

kim.bjoern wrote:

Many thanks for your time joevt. I did have this info - but should have asked more precisely:

I've been using some of the other override files shown in this discussion, and I have the structure and file-name correct.

/System/Library/Displays/Overrides/DisplayVendorID-410c/DisplayProductID-8d7

I was asking for the correct data (integer?) in the override file, as it currently displays the Samsung info.

<key>DisplayProductID</key>

<integer>2944</integer>

<key>DisplayVendorID</key>

<integer>19501</integer>

Thanks again - Kim

If you got it to show the Samsung name, then you got everything to work. I guess the graphics driver ignores the incorrect integer values that you have in the override file. The name is another part of the EDID independent of the vendor and product ID. Since you're using the Samsung EDID, you have to change the EDID to show the Philips name (you should probably use an EDID editor to do that - so that it recalculates the checksum too). Or you could start with the original Philips EDID and just change the preferred timing (again, using an EDID editor). Here I changed the pixel clock to 444.50 MHz to give a refresh rate of 50.011 Hz:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>DisplayProductID</key>
  <integer>2263</integer>
  <key>DisplayVendorID</key>
  <integer>16652</integer>
  <key>IODisplayEDID</key>
  <data>AP///////wBBDNcIAAAAABAYAQSlPiJ4OlUloVdPoCgPUFS9SwDRwIGAgUCVD5UAswCBwAEBoq0AoPBwPoAwWIoAbVUhAAAaAjqAGHE4LUBYLEUAbVUhAAAeAAAA/ABQaGlsaXBzIDI4OFA2AAAA/QAXUB6gPAEKICAgICAgARkCAyP0SwECAwQFkBESExQfIwkHB4MBAABqAwwAMAAAeCAAAAI6gNByOC1AECyWgG1VIQAAGAI6gBhxOC1AWCyWAG1VIQAAGAR0ADDycFqAsFiKAG1VIQAAGgEdALxS0B4guChVQG1VIQAAHgAAAAAAAAAAAAAAAAAAAAAAAAAAgA==</data>
</dict>
</plist>

The Phillips display uses longer pulse widths than what SwitchResX calculates using CVT-RB but the blanking periods are the same so I didn't change them for 50 Hz.

Bingo! You're a star joevt!

Philips Brilliance 288P (288P6LJEB) now running 4K on D-700's with 111.1KHz,50Hz

Greetings from Denmark - Kim

Hi there,

I purchased the samsung UHD monitor as well, however when I connect it my maximum resolution option is 1080p for some reason. Anyone?

Im on a 2.5 ghz mbp retina 13' , osx 10.9.4

some input would be appreciated!

thanks

Hello e.rii, thats right. Sorry to say, but you need the 15" with nvidia graphics for 4k.

ouch! ok, upgrade time.

Thanks for getting back to me

e.rii wrote:

I purchased the samsung UHD monitor as well, however when I connect it my maximum resolution option is 1080p for some reason. Anyone?

Im on a 2.5 ghz mbp retina 13' , osx 10.9.4

You should be able to get 4K @ 30 Hz over HDMI.

Everyone seems to be complaining about the tearing problem when using the display port. I have another problem. I am still using the HDMI at 30hz. The problem I notice is not tearing, but streaks in the display. Anyone else seeing this?

When I was using HDMI, my monitor was fine, and now it is still fine at 60hz. My monitor is a few months old now.

Streaks sound like a monitor issue.