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Paper Tape
Posts: 2
Registered: ‎05-30-2017
Location: CZ
Views: 1,754
Message 1 of 5

x250 4k via mDP to HDMI

Hello, I try to set 4k on LG 27UD68-W, but I am not successful. I have latest display drivers and latest bios. But still, I may set only FHD. I use mDP to HDMI cable which supports 4k - tried it with MCB. I have WIN10-64b installed (updated from WIN8). I will be thankful for any tips.


EDIT: I think that I am wrong because that cable sends probably information through some thunderbolt fibres. I will buy mDP - DP Lenovo cable and I hope that it will work. I don't have a different device with mDP for testing.

Posts: 948
Registered: ‎06-03-2011
Location: US
Views: 1,694
Message 2 of 5

Re: x250 4k via mDP to HDMI

Could you provide more information about the system configuration on your x250? What processor, graphics, and RAM does your machine have? What kind of mDP to HDMI cable are you suing? 

I see that the monitor you are using supports HDMI 2.0, but I'm not sure if the x250 is going to generate an HDMI 2.0 signal through the mDP to HDMI cable. I hope that the Lenovo mDP-DP cable will work. I will be able to understand the issue better once I have more information. 

X1 Carbon 3rd Gen Type 20BT i7-5500U, 2560x1440 (non-touch), Win 10 Pro, 8GB RAM, 512 SSD, Intel 7625 WiFi, BT 4.0 | ThinkVision P24q-10 monitor

When asking for help, post your question in the forum. Remember to include your system type, model number, and OS. Do not post your serial number.

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Paper Tape
Posts: 2
Registered: ‎05-30-2017
Location: CZ
Views: 1,685
Message 3 of 5

Re: x250 4k via mDP to HDMI

It was better to buy dock station and use DP - DP and everything work fine (4k 60Hz). The problem was really in the cable because it is used for Macs and probably works for it because uses some thunderbolt functionality (idk how it works).

What's DOS?
Posts: 3
Registered: ‎04-01-2018
Location: PH
Views: 1,172
Message 4 of 5

Re: x250 4k via mDP to HDMI

I have the same problem. I am using an x250 laptop (i5-5200U) running on Windows 10 Pro x64. I connected my laptop to an external monitor (LG-29um58-p) which has a max resolution of 2560 x 1080/60 Hz. I can only select 1920 x 1080 as the max resolution. I am using an mDP to HDMI adapter. What could be the problem? The same adapter when used with an x230 laptop gives no problem and can select max resolution. Thanks

Paper Tape
Posts: 7
Registered: ‎06-07-2019
Location: GB
Views: 319
Message 5 of 5

Re: x250 4k via mDP to HDMI

For the ThinkPad series, you have usually a bios setting showing the how display port should be used, on the dock, physical display port etc. I believe there are 4 settings, so if you connect directly from the ThinkPad to the 4k60Hz supporting monitor you need to select Digital Display (physical port available on ThinkPad and F10/save quit. I would recommend using the latest BIOS available through Lenovo website as well. Quick installation, no need to burn cd or create usb for bios update.


If you do not have the correct display port setting at bios, this might have 4k30Hz but not 4k60Hz issues.


Hope this helps.

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