switchresx 4k problem

esenboga

macrumors newbie
Original poster
Sep 1, 2014
8
0
hello.

i use a samsung uhd28 4k monitor with a 2014 mac mini by display port cable. (thunderbolt to display port)

whenever i try to use switchresx to setup 4k with 50hz, i couldn't get the custom resolution active, it always indicates "not installed" on the custom resolutions bar.

have anybody encountered this or have a solution?

btw i use yosemite.

 

wakele

macrumors member
Jan 9, 2015
50
1
hello.

i use a samsung uhd28 4k monitor with a 2014 mac mini by display port cable. (thunderbolt to display port)

whenever i try to use switchresx to setup 4k with 50hz, i couldn't get the custom resolution active, it always indicates "not installed" on the custom resolutions bar.

have anybody encountered this or have a solution?

btw i use yosemite.

Image
Hello. In my case, with the dell p2415q it only works if I keep the hdmi and dp plugs plugged in at the same time. Try this...I think that doing that, allows macosx to detect well the screen, don't know the reason exactly. So try that. Plug they both connections at the same time, select dp in your screen, and try to activate the resolution using switchresx. For me, it works, and how i got there it is a long story :p
 

stempsons

macrumors regular
Feb 15, 2014
124
2
go to the top, file and select save, that should do it for you. I have the same set-up.
just to clarify, you are using a mac mini with 4k display and only the dp cable and are able to achieve 50hz with screen freezes?
 
Last edited:

luisn17

macrumors member
Jun 23, 2008
68
0
Miami, Fl
just to clarify, you are using a mac mini with 4k display and only the dp cable and are able to achieve 50hz with screen freezes?
For some odd reason you need to connect both the DP and HDMI. If you connect only the DP either the computer or monitor, not sure which one is to blame, will fail to recognize each other. You will get a black screen. You need to have both connected in order to get 50hz with the DP.

I posted a similar question earlier. Yes, I have the same set-up you have Mac mini and the same samsung monitor.

I just wish there was a way to hardcode the resolution to the mac mini. Seems Switchrex does the job but not that great.
 

stempsons

macrumors regular
Feb 15, 2014
124
2
For some odd reason you need to connect both the DP and HDMI. If you connect only the DP either the computer or monitor, not sure which one is to blame, will fail to recognize each other. You will get a black screen. You need to have both connected in order to get 50hz with the DP.

I posted a similar question earlier. Yes, I have the same set-up you have Mac mini and the same samsung monitor.

I just wish there was a way to hardcode the resolution to the mac mini. Seems Switchrex does the job but not that great.
yep, that's what i figured. that is how i have it setup as well, and so far all is well at 51hz. it's strange, that the retina 13" does just fine via dp cable only...oh well, can't complain so long as it works one way or another.