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Yes, the problem is with VirtualBox window. It's buggy from the beggining, before install and run any VM.
I've posted the video how the fresh install of VirtualBox looks like, here is the link:...

Here is the output for lspci -ks 00:02.0 :

00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
DeviceName: Onboard IGD
Subsystem: Dell HD Graphics 620
...

I've recorded video, to show how the bug with VirtualBox display looks like. It's fresh instalation of VirtualBox:
https://u.pcloud.link/publink/show?code=XZ41NIkZHmcKSwhdlB5SVPAosjSCOYonLeck
It...

Here is lspci output

lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corporation...

My host hardware is:
Processor: Intel® Core™ i5-7200U CPU @ 2.50GHz × 4
Graphics: Mesa Intel® HD Graphics 620 (KBL GT2)
Ram: 7,5 GiB

It should be enough, I was using Virtualbox on worse...

Hi,
I've just installed Virtualbox 6.1 - Version 6.1.10 r138449 (Qt5.12.8) - on Ubuntu 20.04 LTS and it works very slow. The Virtualbox interface is laggy, f.g. when I uncheck some checkbox in the...