Hi Jeremias,
I have also the same issue. My board is Apalis imx8 with Torizon os, and my carrier board is ixora.
I see a pink line at the left edge of my screen (10.1inch, 1024x768) which is connected via HDMI, and it still appears even if I changed the os to another, like: Qt Multimedia image.
Also there is a faint flickering on the screen.
I couldn’t find out how to disable plymouth, and I’m not sure if this will help.
I tested my screen with another boards from another companies, and I didn’t find any issue like this.
Do you have any ideas about this please? How can I solve this issue?
Best regards,
Tarek