Upstream support for rk3588 is still wip. For desktop usage I suggest to either try "edge" which may have the feature you want already merged in or try "vendor" kernel which is based on Rockchip BSP.

@DaBo Thanks for sharing this. Are you able to run Armbian on this? Is LAN, HDMI, etc working fine on this?

Hello, good evening. I'll check again tomorrow; I don't remember which version of Armbian I have installed, but the microphone works without any problems in Armbian. I simply installed the Armbian version and didn't have to modify anything.

The problem (Armbian on U9-H requires physical button after power loss) The discovery process (MCU at I2C bus 0, address 0x15, register 0x11) The fix: i2cset -y 0 0x15 0x11 0x00 The systemd service for persistence That 0x01 = button required, 0x00 = auto power on Note it likely applies to the Minix NEO U1 as well since it uses the same MCU

From your logs: Healthy: 6.12.32-current-meson64 Unhealthy: 6.18.15-current-meson64 Certainly sounds like something changed/broke in a major kernel update? For the near term, I would grab a copy of the 6.12 kernel and keep a copy. The apt tool should have saved a copy in /var/cache/apt/archives, so you should be able to pull a copy from the good system, and use "sudo dpkg -i" to downgrade the other two boards for the time being. If the working node has been upgraded, it's fan will probably stop working as intended after a power cycle. In parallel, the next thing to do is to take a look at the .dtb files for both kernels (amlogic/meson-sm1-odroid-hc4.dtb), and see what's changed. If I have a free evening, I'll take a peek. As @Igor as the board maintainer, you can also file a bug at https://github.com/armbian/build/issues, but could be a bit to get addressed.