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4K Monitor Support in OS X 10.9.3 - Testing Thread

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I also have the Samsung U28D590 28" 4K display which works fine over HDMI but when I boot with the Displayport via on board graphics HD4600 I get a system memory allocation error before I even get to Chimera.
Do you have "GraphicsMode=X" in org.chameleon.Boot.plist? I had mine set to "1920x1080=32" with a Dell UP3214Q, & encountered that same error. I assume it has something to do with with the GPU graphics not allocating enough memory for scaling 4k down to 1080p before the proper driver is loaded. After removing it, I could boot, but the boot images were extremely skewed & cropped. Still no 60 Hz, unfortunately. I've been through five different graphics cards of varying chipsets trying to find a solution, to no avail. I've used this same display on a Cylinder Mac Pro @ 60 Hz, & it really is stunning. Hopefully one of us will figure it out soon, because I've convinced myself that I can't live without it.
 

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Is there anything I should know before changing to that system definition?
Your system will probably kernel Panic once you restart, Solution is boot into OS X with -x (Safe Mode). Navigate to /S/L/E and delete the AppleTyMCEDriver.Kext. Restart without boot flags.
 
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For what its worth, the Samsung U28D590 seems to default to the same settings as the Dell UP2414Q in OS X 10.9.3 (but without the need of setting MST options in the monitors menu system).

Under "System Preferences > Displays > Resolution > Best for Display" the default seems to be 1920x1080 HiDPI. Under the Scaled option, there is no native 3840x2160 option to choose from. However, native 3840x2160 can be set using a utility like "Display Menu" or "Resolution Tab".
 

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Just came across a few articles on testing the new 4K support in OS X 10.9.3. Looks like retina resolutions are available from mini-DP ports at 60 hz now.

View attachment 92951

Has anyone here tested a 4K monitor or TV with the new update? Let us know!
Yes, see my posts here:

http://www.tonymacx86.com/articles/132459-article-os-x-10-9-3-update-4.html#post810947

and here:

http://www.tonymacx86.com/articles/132459-article-os-x-10-9-3-update-24.html#post812273

Strange that Apple doesn't mention the Samsung monitor, which is the least expensive of them I think
 
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Yes, see my posts here:

http://www.tonymacx86.com/articles/132459-article-os-x-10-9-3-update-4.html#post810947

and here:

http://www.tonymacx86.com/articles/132459-article-os-x-10-9-3-update-24.html#post812273

Strange that Apple doesn't mention the Samsung monitor, which is the least expensive of them I think
Actually I think the Dell P2815Q 28" 4K monitor is the cheapest since I have seen it as low as ~$550 or so. It's 30Hz only at 3840x2160 though so it's price has lowered (depending on where you go) since the Samsung U28D590 came out (and stabilized with respect to price).

However, about this:
On the down side, I'm getting some occasional flickering at that res, but I can live with that.
I don't see that occasional flickering that you speak of in 10.9.3. Maybe its a driver issue or a settings issue. I'd suggest trying some different setting in your monitors menu system and be sure game mode is off.
 
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GTX 770 & UP2414Q here also, and no dice with 60hz.
 
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Yup, I have 3840x2160 in my plist, I've attached it to this message. I still can't boot with mine connected, have to hot plug it on Chimera screen.
 

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I updated my CustoMac (GA-Z87M-D3H, i7-4770K, GigaByte GTX 660Ti, DELL UP2414Q, SMBIOS: Mac Pro 3,1) to 10.9.3 yesterday (only had to patch audio) and everything works great! I have enabled DisplayPort 1.2 on the UP2414Q's OSD, and I know the 660Ti can drive monitors up to 4096x2160 via display port (from Nvidia's website):

>>3 - 3840x2160 at 30Hz or 4096x2160 at 24Hz supported over HDMI. 4096x2160 (including 3840x2160) at 60Hz supported over >>Display port. Support for 4k tiled MST displays requires 326.19 driver or later.

but I cannot get 60Hz running with any resolution :(
The UP2414Q defaults to HiDPI (best for display 1920x1080 @ 30 Hz) and while the picture quality is stunning (text and images
are stunningly sharp and crisp), the rendering @30Hz is hard to work with.
I can use the scaled resolutions (even up to 3008x1692), but ALL still only at 30Hz.

As the Nvidia site states, perhaps drivers are required for 4K MST to work.
I will try this in the next few days and post updates with results.

NOTE: Because the Dell UP2414Q has a built-in card reader, I get 4 EBIOS read error: Error 0x31 errors
on boot, but everything starts OK after the 4 errors disappear (4 seconds).
 
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It is quite frustrating to see how many people struggle with 60 Hz in MST (DisplayPort 1.2) mode with 4K monitors, especially the UP2414Q, even with 10.9.3, which supposedly addresses this very issue. It is even stranger that a handful amount of people did manage to get theirs work in 60 Hz with their hackinstoshes. For these few the main trick was to try 10.9.3 with a MacPro6,1 SMBios, but for others (myself included) this didn't work out.

In my case, if I use the MacPro6,1 SMBios my UP2414Q monitor is not even recognized by OS X in MST mode. When I change to iMac14,2 SMBios, though, the monitor gets recognized in MST mode, but the display is still stuck in 30Hz refresh rate. I couldn't get any custom mode work with SwitchResX either.

I'd really have no problem getting my hands dirty with some kext plist hacking or something similar, only I have no idea where to start digging. I've already tried different combination of monitors, graphics cards (GTX 660/770) and drivers (Nvidia Web Driver/Apple's built-in one), SMBios'es, re-installs, etc, to no avail.
 
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Yeah - for me the default "1080x1920" setting works the best. Fonts are large but everything is in "retina" very sharp. Love this thing - its eye candy big time. Had it for awhile but still can't get over how nice it looks!
 

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