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HP Recommended
Microsoft Windows 10 (64-bit)

Have a work HP Elitebook x360 1030 G4.  With it an 

  • iiyama G-Master GB2888UHSU-B1 28" TN LCD, 4K UHD 3840x2160 monitor
  • ASUS VP249HR 24 Inch (23.8 Inch) Monitor, FHD (1920x1080), IPS, HDMI
  • and a Lenovo Hybrid docking station

Prior to that I had a Wavlink UG39DK1 docking station which I sent back as I suspected the below described symptoms were related to the docking station.

The monitor is capable to 4K resolution and TBGH, I find lower resolutions difficult to use. The problem that a few times a day, mostly during important calls, the screens go black (loses connection with the laptop) for 10-20 second after which connection restores gradually, VPN drops so I have to manually connect back.
The notebook tells me that the recommended resolution is 3840x2160 and the refresh rate is 30 kHz

I feel the issue is more frequent with a higher resolution  but I might be wrong. Change from HDMI to DisplayPort didn't help
The docking station is capable enough and so was the previous one. Is this a software issue or a faulty hardware with the EliteBook?

It's a work laptop so I cannot install any additional software

Can anyone help?

† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.