wilsonh

check this post: There is a patch by jock which works well.

Thanks!! The patch works perfectly! I have the similar but not exactly issue (no options above 1080p) on RockPro64 here: After applying the patch, immediately the system picks 2K automatically after robot. By the way, am I supposed to do so since I just realized the patch is made for OPi 4 LTS.

It seems that the HDMI output does not have any option beyond 1080P. Tried multiple monitors. The font size at uboot stage seems right but the resolution maxed out at 1080P after kernel starts. Tried Armbian 24.2.1 with 6.6.16. Could be related with this: https://forum.manjaro.org/t/rk3399-hdmi-output-for-resolutions-different-than-1080p/90644. but patches should be applied at Kernel 6.4: https://www.phoronix.com/news/Linux-6.4-imx25-Rockchip-4K Attached is the screenshot when connected with DELL 25inch monitor. Should have 2K option. diagnoses: https://paste.armbian.com/gaketoluye Thank you