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06-28-2020

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3rd Ext Monitor Screen Resolution

2021-07-14, 13:45 PM

Resolution on 3rd monitor is less than 800 x 600, when it should have a max option of 1920 x1080.

The monitor shows correct resolution when I switch monitor position from 3rd to 2nd or 1st, (which means it's not a monitor issue) but the 3rd position always shows up to 720 x 576 resolution.

2 monitors are using Display port to Display Port on the Docking Station,
one monitor is using HDMI > for this monitor, I've used HDMI to HDMI-Port on the Docking Station, and HDMI to Display-Port on the Docking Station,

Again,  All monitor shows correct resolution when not in the third position

When I disconnect the monitor-cables from the Docking Station and re-connect them in a different order, then the problem is no longer in the third position(so it's not the Docking Station)

This was working and the issue started after a Windows Update (rolling back is not an option)

T490s with Windows 10 -1909

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5657 Posts

08-02-2018

Philippines

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Re:3rd Ext Monitor Screen Resolution

2021-07-22, 21:28 PM

The docking station is listed compatible with the machine as per the smartfind: https://accessorysmartfind.lenovo.com/#/search?categoryL1Name=Docking&categoryL2Names&keyword=&pageIndex=1&pageSize=40&query=&subSeriesList=22TP2TT490S&systemId=22TP2TT490S

 

However, as mentioned earlier, the laptop can only have a max of 2 external monitors to have those resolutions, or else the bandwidth will be shared.


Regards

 

 


Jwes_Lenovo



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5657 Posts

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Re:3rd Ext Monitor Screen Resolution

2021-07-14, 20:32 PM

Hello Bamma!


Welcome to community forums

 

 

What is the model or MTM of the docking station?

As per the product spreadsheet for the T490s. the machine can have up to 2 external monitors via HDMI® (up to 4096 x 2160 @24Hz) and Thunderbolt™ (up to 4096 x 2304 @60Hz)

 

You can refer to this link; https://psref.lenovo.com/Product/ThinkPad/ThinkPad_T490s

 

 

Jwes_Lenovo



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Re:3rd Ext Monitor Screen Resolution

2021-07-22, 17:14 PM

It's a USB-C Dock Gen2,  Type 40AS

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Re:3rd Ext Monitor Screen Resolution

2021-07-22, 18:03 PM

Model No: LDC-G2

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Re:3rd Ext Monitor Screen Resolution

2021-07-22, 21:28 PM

The docking station is listed compatible with the machine as per the smartfind: https://accessorysmartfind.lenovo.com/#/search?categoryL1Name=Docking&categoryL2Names&keyword=&pageIndex=1&pageSize=40&query=&subSeriesList=22TP2TT490S&systemId=22TP2TT490S

 

However, as mentioned earlier, the laptop can only have a max of 2 external monitors to have those resolutions, or else the bandwidth will be shared.


Regards

 

 


Jwes_Lenovo



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30 Posts

05-28-2020

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Re:3rd Ext Monitor Screen Resolution

2021-07-27, 7:23 AM

@ Bamma wrote:

It's a USB-C Dock Gen2,  Type 40AS

3x 1920x1080 is not supported with the combination of T490s and the USB-C Gen 2 dock.  Display and Video Output Configurations - Docking Stations - Lenovo Support GB

You should be able to run one of the displays of the internal HDMI. You would need a Thunderbolt dock to be able to get the most out of the T490s. 

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Re:3rd Ext Monitor Screen Resolution

2021-07-27, 20:36 PM

TB dock can be a good alternative unless you prefer to do some daisy chain on the USB C TB connection.

 

 

Jwes_Lenovo

 

 



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