Mac Pro Late 2013 and Samsung 4k monitor problem

My Samsung monitor has had a few issues waking but those seem to have gone away. It does sometimes take two tries to get the picture back. I haven't had to unplug it yet. After installing 10.10, it seems to be waking just fine with a single mouse click. Doesn't wake if I just move the mouse.

Basic apps seem to work fine, however, OSX Server 3.1.2 doesn't work with the new OS. The app doesn't start but the underlying settings seem to be intact and I can log into the machine with my iMac just as I did before.

Hi, thanks for that step by step.

I followed it to the T and I am getting this error at the end "[ Error writing DisplayProductID-b80: Permission denied ]"

After I press Ctrl-X then Y and press enter when it asks "File Name to Write: DisplayProductID-b80".

Can you please help me?

Thanks!

Sushlee wrote:

Hi, thanks for that step by step.

I followed it to the T and I am getting this error at the end "[ Error writing DisplayProductID-b80: Permission denied ]"

After I press Ctrl-X then Y and press enter when it asks "File Name to Write: DisplayProductID-b80".

Can you please help me?

Thanks!

Try creating the file elsewhere (in your home folder), then use the Finder to copy it to the appropriate folder. The Finder will ask you to enter your password. I don't know if it's necessary to change the file owner ("sudo chown root:wheel filename") and permissions ("sudo chmod 644 filename"). You can check permissions of the files with "ls -l".

I apologise, I come from a different IT world to all of you where a 6 core device is referred to as a 6-way. The cable is certified as 1.2 and it works just fine on my Gigabyte Brix where it happily runs the PB287Q at 4K 60hz. I have read the bus layouts document and I came to the conclusion that it didn't matter which Thunderbolt port I used given that, at this port in time, I'm not using any of them for anything else.

Within BootCamp I have tried a beta AMD driver which actually supported 4K at 60hz but stability appeared to be an issue. What AMD driver are you all using?

Thanks for the help!

I'm having the same issues.

here is my config : 6Core nMP Dual D500.

Asus PB287 (Week 20 of 2014)

Yosemite DP5 is stuck in 30Hz, and from time to time the screens blinks to black.

I tried 10.9.5 beta 1 with no luck.

I'm reverting to 10.9.4 and I'll apply joevt's override settings.

I was looking at the Asus monitor and it looks very similar to the Samsung but with an actual stand that can tilt and swivel!

One of the reviews said that the Asus had a fussy menu setup to switch from Displayport 1.1 to Displayport 1.2. That may be why the monitor seems to be stuck at 30 Hz.

I need to add a second monitor so maybe I will look at the Asus this time.

I also have the base model 2013 Mac Pro (with the AMD D300 graphics card). It seems that these issues are only happening with the AMD 500's and AMD 700's.

Can anyone else confirm ToniMaccaroni's experience: that the Samsung 28 inch 4k monitors work with the AMD 300's (60Hz and 4k resolution) with no problems?

Thanks

SJScott,

I have a case open with Apple and have escalated this issue to engineering. I've also volunteered to help them if needed by testing and such. I hope they can fix the issue across the board as it looks like this is a common issue. I'm supposed to hear back early next week.

Thanks.

Trace

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!

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).

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

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