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125 Posts

01-30-2016

Denmark

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  • Posts: 125
  • Registered: ‎01-30-2016
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P50, Win10 with external LCD cannot display native resolution at 60 Hz

2016-12-28, 11:00 AM

Hi,

I really could use some help with this as it has been a MESS, and I'm not sure where the culprit is.

 

Setup:

I'm using a P50 with hybrid graphics (P530 and nVidia M2000M). The M2000M is running driver version 21.21.13.6909. I The P50 is put into the Workstation Dock, which is running latest firmware.

I connect my external monitor, a NEC LCD2490WUXi to the Workstation Dock using a higher end 2m long dual-link DVI-to-DVI cable. The native resolution of the monitor is 1920x1200 running at 60 Hz.

 

Problem:

Using nVidia control panel, when putting the monitor at it's reported native resolution, the monitor displays 1600x1200 at 60 Hz. However, Windows thinks it is displaying 1920x1200, thus literally just making the display unusable, since maximized winows are maximized outside of what is displayed.

In nVidia Control Panel, I can create a custom resolution of 1920x1200 but with a refresh rate of 59 Hz. Applying this, makes the monitor show everything correctly at 1920x1200, but the monitor reports back that it is receiving a 59 Hz signal, which causes some graphics tearing.

 

When I put the P50 to sleep and wake it up at a later time, the login screen briefly flashes at 1920x1200 at 59 Hz, but then the M2000M pulls the EDID from the monitor and detects that it should run at 1920x1200@60Hz. Thereby, making the monitor display in 1600x1200 again.

When I log in and enter the nVidia Control Panel, my custom resolution I created is gone from the list of resolutions. I can add it again by clicking "Customize..." and tick the custom resolution, but this is honetly driving me nuts!!

 

So:

Does anyone have an idea of what might be the culprit?

 

I know it is working fine with my old T60p and ATI v5200 running windows 7.

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125 Posts

01-30-2016

Denmark

237 Signins

2152 Page Views

  • Posts: 125
  • Registered: ‎01-30-2016
  • Location: Denmark
  • Views: 2152

Re: P50, Win10 with external LCD cannot display native resolution at 60 Hz

2016-12-28, 22:59 PM

Problem solved.

It was the monitor.

 

If someone in the future is sitting with a NEC with the same "problem": For some reason, in the advanced menu I had created some custom height/width adjustments of the picture itself. So while the monitor correctly received 1920x1200, it resampled this to 1600x1200. The funny thing is that

1) I forgot I made this modification. When I was using the T60p, I must have used the other DVI port where this resampling was not in place.

2) Apparently the settings only apply at 60 Hz, so when you feed the monitor at for example 59 Hz, then it cannot perform the resampling.

 

 

 

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125 Posts

01-30-2016

Denmark

237 Signins

2152 Page Views

  • Posts: 125
  • Registered: ‎01-30-2016
  • Location: Denmark
  • Views: 2152
  • Message 2 of 2

Re: P50, Win10 with external LCD cannot display native resolution at 60 Hz

2016-12-28, 22:59 PM

Problem solved.

It was the monitor.

 

If someone in the future is sitting with a NEC with the same "problem": For some reason, in the advanced menu I had created some custom height/width adjustments of the picture itself. So while the monitor correctly received 1920x1200, it resampled this to 1600x1200. The funny thing is that

1) I forgot I made this modification. When I was using the T60p, I must have used the other DVI port where this resampling was not in place.

2) Apparently the settings only apply at 60 Hz, so when you feed the monitor at for example 59 Hz, then it cannot perform the resampling.

 

 

 

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