May 4, 20242 yr 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
May 21, 20242 yr I have this same issue. It is displaying 1920x1080 on my 1920x1200 old Dell LCD, when using the HDMI input. If I use an adapter to connect the RockPro64 to to a DVI-D input, I only get 1024x768, bleh.
February 23Feb 23 having the same issiue , would like to improve the situation since most of the monitor that i use come in 16:10 format, and those resolution seem not easily available. also read here on a site it should be capable of 4k output. https://www.electromaker.io/blog/article/pine64-rockpro64-review-a-beefy-single-board-computer Quote The standard USB-C port on the RockPro64 can drive a 4K monitor making the Pine64 RockPro64 a phenomenal board
February 23Feb 23 2 hours ago, kapqa said: having the same issiue , The paste armbian URL displays nothing (anymore?) so without any (new) info from you, no-one can help you. AFAIR, 4K via HDMI connector is only recently available (on RK3588, not sure about RK3399), so make sure you can manage various combinations of U-Boot, kernel, rootfs. So sort of act like a developer, als make sure you have a serial console (debug) cable, else you cannot get any step further. Use a 26.2 based U-Boot and 6.19 rockchip64 kernel I would say, then see what happens.
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