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Shreve
Paper Tape
Posts: 2
Registered: ‎02-06-2018
Location: US
Views: 2,254
Message 1 of 6

Resolution Trouble with Thinkpad P51S and 4K External Monitor

I can't seem to get the resolution set up properly. I have a ThinkPad P51S that I bought a few weeks ago, running Win 10 64-bit, with NVIDIA Quadro M520, and I'm connected to the monitor via HDMI. The highest resolution Windows will allow me to use is 2560x1600, which is the "recommended" setting. This, however, is a different aspect ratio than the monitor's resolution (3840x2160). In the Windows display properties, I can choose 2560x1440, which is the same 1.7778 ratio as the monitor, but I really want to use its full resolution.  Any ideas? 

SeniorGuru
Posts: 2,242
Registered: ‎06-13-2013
Location: US
Views: 2,236
Message 2 of 6

Re: Resolution Trouble with Thinkpad P51S and 4K External Monitor

I have a Win7 desktop machine on which I have an Eizo 31" CG318 4K monitor with a 4096x2160 native resolution, driven by an nVidia GTX 1050ti graphics card running the latest retail nVidia driver.

 

A resolution of 4096x 2160 is simply too small for my tastes, and I decided that 2560x1440 (with text at 150%) is what I wanted to run, even though this produces some black bars on the left and right of the screen (i.e. 2560x1440 does not use 100% of the screen real estate).

 

Well, turns out 2560x1440 is not one of the standard resolutions officially supported by the monitor, so I had to create a "custom resolution".  I am thinking this might be what you need to do with your P51s and external 4K monitor in order to get driver support for the 3840x2160 that you want to run it at.

 

Assuming the nVidia driver on your P51s with M520 runs the same way it does on my desktop machine with GTX 1050ti, using nVidia Control Panel select Display -> Change resolution.  I imagine what will appear in the resolution pane are the standard resolutions supported by the monitor and driver.

 

Push the Customize button below the resolution pane, to open up the Customize dialog window.  Check the box that says "enable resolutions not exposed by the display".  Then push the "Create Custom Resolution" button.  You may be prompted with a confirmation dialog saying you understand the risks, and click OK (or next, or whatever).

 

You will then get a "Create custom resolution" dialog window, and you should be able to create the 3840x2160 resolution, color depth 32, scan type Progressive, and hopefully refresh rate 60hz.  I was certainly able to create my own 2560x1440 like this.

 

Then push the Test button to confirm that it works.  Then OK yourself back to close these two windows.  You should now see your new custom resolution appearing as available for selection in the resolution pane list.

 

Nvidia_custom-resolutions.jpg

 

 

p600
Broadband 3G
Posts: 484
Registered: ‎10-03-2011
Location: CA
Views: 2,194
Message 3 of 6

Re: Resolution Trouble with Thinkpad P51S and 4K External Monitor

HDMI 1.3 has maximum resolution 2560x1600. Probably that's the highest version that the monitor supports.

 

Try DisplayPort/Thunderbolt etc., whatever the monitor has.

 

 

Highlighted
SeniorGuru
Posts: 2,242
Registered: ‎06-13-2013
Location: US
Views: 2,186
Message 4 of 6

Re: Resolution Trouble with Thinkpad P51S and 4K External Monitor


@p600 wrote:

HDMI 1.3 has maximum resolution 2560x1600. Probably that's the highest version that the monitor supports.



Good point.

 

I am using miniDP->DP (i.e. using one of the two DP connectors on the Eizo) with my P70 and Eizo CG318 (HDMI 1.4), which explains why I can select all the way up to the 4096x2140 (native) resolution which is shown in the "standard" list.  I am not using either of the two HDMI connectors on the monitor.

 

And I can also select 2560x1600 if I wanted to, as that is a "standard" resolution also presented in the resolution list.  It was only 2560x1440 which is non-standard and which I had to custom create.

 

Unfortunately DP connectivity is not HDCP-compliant, whereas HDMI is (and also DVI is). So, for example, a DP-connected monitor cannot be used to display copy-protected WTV content from Windows Media Center (in Win7).  I believe the same holds true for playing and display of BluRay disc content, which also require HDCP compliance.

 

But if you don't have any such consideration and only want the higher 4K resolutions, then DP is the answer.

Shreve
Paper Tape
Posts: 2
Registered: ‎02-06-2018
Location: US
Views: 2,174
Message 5 of 6

Re: Resolution Trouble with Thinkpad P51S and 4K External Monitor

I got it to work using the USB-C port. Thanks!
carloa
Paper Tape
Posts: 7
Registered: ‎05-29-2018
Location: CA
Views: 1,540
Message 6 of 6

Re: Resolution Trouble with Thinkpad P51S and 4K External Monitor

USB-C solves LOTS of the headaches related to the P51S and the HDMI port.. DUMB but necessary..

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