Willzen

I know the reason for this problem, Waveshare manufacturers of this type of 7" 1024x600 resolution screen, the screen interface is HDMI, but the internal conversion protocol is DVI to LCD, so the actual signal in HDMI needs to be DVI, here you need to open the HDMI YUV format output to be compatible with this kind of screen. This is a special screen and I have not found a way to turn on the yuv output in the drm display-subsystem driver for the rk3588.

@Efe ÇetinI fixed the problem in the same way url and contacted OrangePi officials, who tested that the 8K monitor also worked, and I tested myself that the 1440x900 resolution and 2880x864 resolution monitors worked fine. Hopefully this will provide you with some test data to help you resolve these issues. Link: Fix dclk parent clock for hdmi vop0（https://github.com/WillzenZou/armbian_fork_build/commit/a58816d68ca73db36c9ca8ffc2444c872a1dd295）