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Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-05-31, 7:32 AM

Hello community,

 

I just recently got my Thinkpad E585 which is great with an AMD Ryzen 5 2500U with Radeon Vega 8 Mobile graphics.

Native resolution is 1920x1080, which is also the resolution of plugged in external monitor, the Dell U2312HM.

 

Problem is:

I can't change the resolution of the external monitor, either on desktop nor in any game.

Latest systemdrivers and graphicsdrivers are installed, for the Thinkpad as well as for the Dell monitor.

 

The monitor is connected via Displayport to HDMI, which worked fine before with my Dell laptop 15R 5537 (an Intel graphics laptop).

I only use the external monitor, not the laptop display.

When I use the laptop display I can change to any resolution I like, espacially lower resolutions like 1024x768 stretched.

 

Thanks for any help!

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Re: Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-05-31, 7:32 AM

Here are my radeon settings.

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73 Posts

10-20-2018

CA

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Re: Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-05-31, 15:22 PM

Are you using Radeon settings or Windows display settings? (Desktop >right click > Display Settings)

 

 

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Re: Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-05-31, 15:23 PM

Granted, I'm using the HDMI port so it might be work differently.

 

 

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Re: Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-05-31, 15:44 PM

Both, I can't change it in windows settings.

Even advanced settings and display all modi doesn't bring more options up.

I can add custom resolutions in the radeon settings, but they dont show up in the drop down menu.

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73 Posts

10-20-2018

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Re: Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-06-01, 9:53 AM

Looking at Dell's driver page and some online discussions, it appears Dell somehow managed to make some of their monitors incompatible with Windows 10! (A bit ironic, considering Lenovo somehow managed to make this laptop difficult to boot with anything but Windows 10)

 

I would suggest trying out the Windows 8 drivers (don't install them, unless the following doesn't work). Extract them or run the exe if it has one then cancel and look for the temp folder. Go to the advanced settings page either on that screenshot you posted or through device manager. In the driver tab, update driver, say you want to manually search then point the installer to the folder.

 

It looks like you want a lower resolution to improve frame rates in games, right? It's weird that even the games don't allow you to change the resolution. Try changing the "render scale" to a lower value like 75% if there's such a setting.

 

The discussions I've read show that these monitors used to be even more troublesome so perhaps it's a good thing there is a working driver for it, albeit providing a single resolution.

 

If you want large icons and text in the desktop, you could increase display scaling in that page you posted to a higher value like 125%.

 

If the above doesn't work, try using the advanced settings to manually select a driver from the built-in list. You should be able to go into generic monitors and select something "Digital Flat Panel 1280x720." Hopefully this will force a lower resolution.

 

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Re: Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-06-01, 13:13 PM

My last post seems to have been deleted, so I'll keep this one short and hope there's nothing rule-breaking in it...

 

Try installing the Dell drivers in compatibility mode.

 

For game performance, you could try reducing the render scale in the game if it supports the option.

 

For larger desktop items, you could increase desktop scaling.

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Re: Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-06-02, 18:23 PM

Noooo!

Just saw your longer post on mobile and really appreciate the detailled answer!

Maybe you can send it to me via mail: [redacted]

 

That would be really nice.

Nevertheless I will try your latest answer tomorrow when I'm at work.

Best regards!

 

Admin note; email address removed to prevent potential abuse.

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  • Message 9 of 22

Re: Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-06-03, 7:22 AM

Okay so I tried your method, but it didn't work for me.

It's the same driver I downloaded before.

I tested in compatibility mode, then installed them again, no change.

 

It's crazy, that it's not working, with other laptop it works just fine.

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9184 Posts

09-04-2014

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Re: Thinkpad E585 - external monitor Dell U2312HM - Resolutionchange not possible

2019-06-07, 6:23 AM

 wrote:

 

The monitor is connected via Displayport to HDMI,


Hello,

 

A question. The E585 doesn't have a Display Port and as such will not support it natively, exactly how is the notebook connected to the display; which cables and adapters?

 

Andy

 

English Community Administrator
Lenovo eServices

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