28" and 4k resolution problem

[massive]

Hi

 

My problem is that armbian 6.0.7 kernel hasn't recognised my 28" samsung 4k monitor.It recognised like a 29" monitor.How can I fix this problem? and in 4k resolution right of the screen doesn't show properly.In this side of the screen is completely white.

 

Another problem is that  4k video plays very slowly How can I fix this problem?

 

Thank you for your answers!

[Andre Van Der Weide]

I have the same problem with a acer 28inch 4k monitor in 4k mode on rock pi 4b+ v1.73 running on nvme .The right part is also gone with a sort of overlay in fullHD mode its okay  

on armbian version 23.02.2 with kernell 5.15.93 no broblem the problem is with Armbian 25.5.1 with kernell 6.1.30

[Igor]

14 minutes ago, Andre Van Der Weide said:

the problem is with Armbian 25.5.1 with kernell 6.1.30

 

https://docs.armbian.com/User-Guide_FAQ/#why-does-hardware-feature-xy-work-in-old-kernel-but-not-in-more-recent-one

It is not possible to copy / paste from old kernel (where this probably works), but it often needs that it has to be developed completely from scratch. Which costs real money (not charity / beer) as nobody can dedicate weeks or months of their private time to fix something he doesn't need ... Code difference between vendors dirty hacked kernel 4.4.y and mainline 6+ is often extreme. Alternative is waiting.