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Have activated DisplayPort 1.2 on the monitor and the screen went black. If I click on the monitor menu button I only get the option to select the input source, how do I disable DP1.2 to get the monitor working again??
 
Have activated DisplayPort 1.2 on the monitor and the screen went black. If I click on the monitor menu button I only get the option to select the input source, how do I disable DP1.2 to get the monitor working again??

plug it in using a hdmi connector to get to the on screen display, when the computer sends the hdmi signal, the rest of the on screen display will become available. from that point you'll be able to de-select the display port 1.2
 
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plug it in using a hdmi connector to get to the on screen display, when the computer sends the hdmi signal, the rest of the on screen display will become available. from that point you'll be able to de-select the display port 1.2

Thanks, that's what I did but if the input is HDMI the DP1.2 option is greyed out and you cannot change it, so still using HDMI I had to reset the monitor to factory settings to disable DP1.2. Cannot see any other way to do it, very stupid implementation, the full monitor menu should always be accessible.

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Since you are here I also would like to ask about SwitchresX: when I create a custome resolution and hit ok then this appears in the list as "not saved". What do I need to do to save it and use it?
 
Thanks, that's what I did but if the input is HDMI the DP1.2 option is greyed out and you cannot change it, so still using HDMI I had to reset the monitor to factory settings to disable DP1.2. Cannot see any other way to do it, very stupid implementation, the full monitor menu should always be accessible.

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Since you are here I also would like to ask about SwitchresX: when I create a custome resolution and hit ok then this appears in the list as "not saved". What do I need to do to save it and use it?

just rebooting the computer will save the setting. when you log back in, you'll be able to see the available resolution options in switchresx. if the screen goes black at log in, the clock speed is too fast for your machine. for my mini, i have to keep the pixel clock right around 400.
 
just rebooting the computer will save the setting. when you log back in, you'll be able to see the available resolution options in switchresx. if the screen goes black at log in, the clock speed is too fast for your machine. for my mini, i have to keep the pixel clock right around 400.

Thanks, I guess I should not bother as the monitor does not work with DP1.2 enabled therefore by definition I will never get 50HZ? Is it because my Dell is MST while this trick works only on SST?
 
Thanks, I guess I should not bother as the monitor does not work with DP1.2 enabled therefore by definition I will never get 50HZ? Is it because my Dell is MST while this trick works only on SST?

i suppose, although you could certainly mess with it and see what happens...i've certainly messed with the 2415q and the mini's pixel clock enough times to totally screw up the computer needing a reinstall of the OS...it's a learning process i keep telling myself.. ;)
 
i suppose, although you could certainly mess with it and see what happens...i've certainly messed with the 2415q and the mini's pixel clock enough times to totally screw up the computer needing a reinstall of the OS...it's a learning process i keep telling myself.. ;)

LOL. To be honest i m totally fine with 30hz, i think i would have barely noticed if i didnt know before, so will not try again, especially if everytime that needs resetting to factory settings (i would lose all my calibration settings).
 
I just turned on my new Dell UP2414Q.....in one word, WOW!! It is amazing.

I switched from Windows to Mac and hated it because of the blurry font rendering of the Mac, now this is what I call crisp!!
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That's great to hear! I haven't checked out the specs on this one yet. But text is what matters to me. I just bought the low end 13" rMBP, standard config., so I would also have to run it at 30Hz. Right now I'm just getting started learning programming, so I will be running mostly static text editors.
 
That's great to hear! I haven't checked out the specs on this one yet. But text is what matters to me. I just bought the low end 13" rMBP, standard config., so I would also have to run it at 30Hz. Right now I'm just getting started learning programming, so I will be running mostly static text editors.

Trust me, 30Hz is totally fine for normal use, you should try it.
I am also happy to report that I have none of the wake-up-from-sleep issues reported by some users. Mine is rev A02, I guess the latest.

I strongly reccomend this monitor. I switched to Mac recently and coming from Windows 1920x1200 is just not usable with Mac blurry font rendering. Now everything is super sharp. I think 24" is the sweetspot for 4k if you want Retina like experience, 27" requires 5k.
 
Trust me, 30Hz is totally fine for normal use, you should try it.
I am also happy to report that I have none of the wake-up-from-sleep issues reported by some users. Mine is rev A02, I guess the latest.

I strongly reccomend this monitor. I switched to Mac recently and coming from Windows 1920x1200 is just not usable with Mac blurry font rendering. Now everything is super sharp. I think 24" is the sweetspot for 4k if you want Retina like experience, 27" requires 5k.

Thanks, Maiz. My late 2009 iMac is at 1920x1080. I haven't even opened the box yet of my new 13" rMBP, which is at 2560-by-1600, so that should be a big difference. At what resolution are you running your monitor?
 
Thanks, Maiz. My late 2009 iMac is at 1920x1080. I haven't even opened the box yet of my new 13" rMBP, which is at 2560-by-1600, so that should be a big difference. At what resolution are you running your monitor?

Running at 4k native resolution (always best) but then OSX is scaling to 1920x1080.
 
Running at 4k native resolution (always best) but then OSX is scaling to 1920x1080.

Thanks. Now let me see if I understand how this works. My iMac is 27" running at 1920 x 1080. You are running the 24" at the same configuration, so the text on yours will be a little smaller, but it will have twice the pixels, so it will be much sharper. Is that correct? I'm still on training wheels when it comes to understanding this stuff.
 
Thanks. Now let me see if I understand how this works. My iMac is 27" running at 1920 x 1080. You are running the 24" at the same configuration, so the text on yours will be a little smaller, but it will have twice the pixels, so it will be much sharper. Is that correct? I'm still on training wheels when it comes to understanding this stuff.

Sure your imac is 1920x1080? Usually 27" are 2560x1440, anyway yes. Same res but smaller screen = smaller pixels =smaller fonts. It will have four times the pixel, twice each side, so much much sharper. Have you gone from a non retina ipad to retina? Take that difference that made to your eyes and multiple by two, that's how good it is 4k vs HD.
 
Was reading somewhere (can't remember where) that installing/using SwitchresX can cause problems - is that only true for earlier versions or is that still the case? If the latter: shouldn't one then avoid using it on a MM still under warranty?
 
Sure your imac is 1920x1080? Usually 27" are 2560x1440, anyway yes. Same res but smaller screen = smaller pixels =smaller fonts. It will have four times the pixel, twice each side, so much much sharper. Have you gone from a non retina ipad to retina? Take that difference that made to your eyes and multiple by two, that's how good it is 4k vs HD.

WHOOPS! I wish I had a 27". That was the error. I meant 21.5".

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Was reading somewhere (can't remember where) that installing/using SwitchresX can cause problems - is that only true for earlier versions or is that still the case? If the latter: shouldn't one then avoid using it on a MM still under warranty?

Hmm. I hope not. I would think if it messed anything up you could just wipe and do a full reinstall of the OS, unless SwitchResX somehow changes hardware formatting? I more concerned about the security concerns of downloading a program that doesn't come via the Apple store, but then I'm a bit paranoid.
 

from my own testing, it's quite easy to mess up your computer/display with switchresx. enter custom resolutions that aren't supported by your display or gpu and you'll quickly encounter issues (black screen, snowy screen and so on). i can't say it's the fault of switchresx however, since i'm the end user purposely creating un supported resolutions to test. if using know to work settings, you'll should't have issues with this program.
 
Thanks for the link, Strawbale. Good info to have on hand in case I do end up trying SwitchResX.

I definitely won't be as adventurous as you, Stempson. If I use, it I'll try whatever settings others using the latest 13" rMBP have reported success with.
 
Thanks for the link, Strawbale. Good info to have on hand in case I do end up trying SwitchResX.

I definitely won't be as adventurous as you, Stempson. If I use, it I'll try whatever settings others using the latest 13" rMBP have reported success with.

on the mini, the 450 pixel clock is unstable, so start with 400 and go from there. i have the mini and retina macbook, and those are my finding with this monitor and switchresx.
 
No, the 4K@50Hz you need to manually set up display timings.

I attached the settings I use. As you see, there is still room for improvement (the max pixel clock is 450MHz, but 4K@50Hz uses only 423MHz - so you can actually reach 53Hz if you want. I choose 50Hz since it is the European/PAL standard). You will need a display that supports DisplayPort 1.2/HBR2.

Through HDMI you won't be able to achieve 50Hz, since the max HDMI 1.4 pixel clock is limited to 300MHz.



Hello,

Do you mind sharing a small step by step to display 4k through display port. I have a Mac mini and say monitor but can only get 4k through hdmi. I'm using a mini display port to displaport and can't get 4k. I attempted to match the numbers listed in your pic and it does not work for me. Seems the computer is stuck hard on 2160 x 1440 and not sure to match your picture.!


Please help me find out what is being done wrong by me.
 
Can somebody confirm that the P2415Q + 13" rMBP + SwitchResX + Yosemity works at 50Hz when displaying 4K in 1080p HiDPI mode? In this thread I read that SwitchResX doesn't always work under Yosemite.
 
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You can however get 4K@60Hz using two cables if your display supports PBP mode (many 4K displays support this). In Windows you can get a seamless experience (one logical desktop) thanks to the intel driver's collage mode. In OS X you will run into some problems, since the Mac will see the two halves of your screen as two separate displays, and you can't stretch your desktop over two displays in OS X (maybe there is a hack for this, but I didn't find any :().

This is probably the most interesting thing I've read so far. I've recently been playing around with the idea of buying a Mini instead of a 13" rMBP but the only thing holding me back is lack of proper 4k support.

Is there really no way to trick the Mac into running a desktop across two displays?
 
Sure your imac is 1920x1080? Usually 27" are 2560x1440, anyway yes. Same res but smaller screen = smaller pixels =smaller fonts. It will have four times the pixel, twice each side, so much much sharper. Have you gone from a non retina ipad to retina? Take that difference that made to your eyes and multiple by two, that's how good it is 4k vs HD.

So the Dell 24 4K monitor is better than the Dell 27 4K monitor because the text is sharper and more retina-like?

I ask because I wanted to go up from a 24" iMac to a 27" Dell for my new Mac Mini. But now I am wondering if it's better to stick to the 24" version. I'm a bit worried that 30Hz will be too choppy?

Does the monitor also support lower resolutions, like the 2560 x 1600 to fall back on if 30Hz 4K is not good?
 
So the Dell 24 4K monitor is better than the Dell 27 4K monitor because the text is sharper and more retina-like?

I ask because I wanted to go up from a 24" iMac to a 27" Dell for my new Mac Mini. But now I am wondering if it's better to stick to the 24" version. I'm a bit worried that 30Hz will be too choppy?

Does the monitor also support lower resolutions, like the 2560 x 1600 to fall back on if 30Hz 4K is not good?

Yes, 24 4k is better than 27 4k (other than size), in the sense that it has got more pixels per inch, 185 vs 150 I think. 150 is still good but to get Retina experience you need 180-200 dpi on an external monitor. So to me 4k on 24k and 5k on 27 are the sweet spots.

I use my monitor at 30hz (Lightroom, web browsing, MS office) and is not bad at all, hardly tell the difference. Try 30hz on your current monitor and see if you can live with it.
 
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