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09-15-2020

DE

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  • Posts: 1
  • Registered: ‎09-15-2020
  • Location: DE
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Problem with t495s / T14s AMD, docking and two LG displays

2020-09-15, 13:46 PM

We've got a strange problem with the following setup:

 

  • t495s (Ryzen 7 PRO) or T14s (Ryzen 5 PRO)
  • Pro or Ultra Docking Station (doesn't matter)
  • two LG 24EB23 displays (1920x1200)
  • connected via DisplayPort
  • all drivers and firmware are current versions (checked via "System Update", double checked manually via website).

 

When plugging in the T495s or T14s (AMD), only one of the displays is recognized. The same setup works flawlessly with an T480s (i5-8250U) - I use it every day.

 

We're in the process of validating the AMD based devices for wide adoption but we're also using a lot of the LG displays, so that's a showstopper.

 

When I put the T14s (AMD) into an Ultra docking which has HP displays instead of the LGs, it works flawlessly.

 

I tried turning on/off the displays, unplugging DisplayPort etc. - no change. The display just doesn't show up in Windows - it's as if it didn't exist at all.

 

Couldn't find any error messages in eventlog - is there some other place to look?

 

Any hints or advice where to look next?

 

Thanks,

 

Jamma.

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