Solved! Lenovo T40 Dual Monitor with LG Ultrawide - Resolution drops.

[dennispad]

I have a Lenovo T470 with 2 monitors attached - it works however one of the monitors is a LG Ultrawide. When the only monitor the resolution is 2560, however with both it drops to 1920 hence the font looks wrong.

I am connecting the laptop with a USB C hub with dual HDMI which both support 4k.

I have read I need to use 30 Hz rather than 60 however I can change it for either monitor, it's 59 or 60.

 

[hang-the-9]

The monitors are not the same modem? Are you trying to duplicate them or extend it? Check for any updated BIOS and video drivers for the laptop. Is that USB C dock a Lenovo one? If you are trying to extend the screens then you may have a bandwidth issue with the dock you are using or the USB C video output.

To see other refresh rates you can select Show All Modes under the display properties.

 

[dennispad]

The monitors are not the same modem? Are you trying to duplicate them or extend it? Check for any updated BIOS and video drivers for the laptop. Is that USB C dock a Lenovo one? If you are trying to extend the screens then you may have a bandwidth issue with the dock you are using or the USB C video output.

To see other refresh rates you can select Show All Modes under the display properties.

I have solved the problem - The T470's usb port isn't powerful enough to support both monitors, one at (LG) 2560 and the other at (AOC) 1920. What I did once use the HDMI port to link one monitor directly to the T470 and then used the USB port connected to a USBC Hub with a HDMI port to the monitor, so all good now apart from it's an extra cable to unpluf when wanting to move my laptop.