Sys-gui visual artefacts

I enabled sys-gui, and it does work, but I get some very interesting visual artefacts whenever content on the display is being updated. The problem happens moth in menus, and in any window, such as a terminal. At first, the content of the window is random noise, which is then refreshed with the correct content within a few seconds.

As the explanation may not be enough, I recorded a short video:

this look like graphic card/driver issue
it annoying, but i like that :laughing:

It forks fine with dom0 though, so I don’t think it’s a card issue. I’m using the on-board Intel graphics on a Lenovo T490. It has a discrete Nvidia MX250 as well, but it’s disabled using a boot parameter.