USB-C to HDMI, then HDMI to VGA adapter not working

[caph1993]

If you use an HDMI to VGA adapter at the HDMI output of the USB-C to HDMI adapter, the output looks bad. It has vertical lines and weird colors and borders (photo below). However, it looks fine using the same setup on the same laptop on windows. Therefore, it must be a driver issue.

My adapter is not the Matedock 2. It is a generic USB-C to (USB-C input + USB-A output + HDMI output). But still, the HDMI output of my adapter is working on linux, as I tested it on some HDMI TVs. The issue appears only when a secondary video adapter (to VGA) is placed and only on linux.

[nekr0z]

MateDock 2 has a builtin VGA output that works in Linux without any issues.

If you're having an issue with some third-party HDMI-to-VGA adapter, it might be a driver issue, but it obviously has nothing to do with running Linux on a Matebook.