@jock Thanks. My box is A95X R2 (rk3318), mainboard A95X R2_V20 (2019‑07‑02). Front panel board A95XCX1_IO_V1.0 (2019‑03‑05). The LED controller on the front panel is TM1628 (photo available). So I should use the tm16xx kernel driver (tm1628), not openvfd. I’ll try rk3318x-config to enable the front panel. If the board isn’t in the list, I can provide front/back photos and dtb.

That's not an issue. These fixup scripts are only there to allow dt overlays being configurable via parameters rather than having hard-coded pins for example. About the actual issue, no clue. I suggest to try 7.0 kernel from "edge".

Armbian_community 26.2.0-trunk.639 Trixie ttyS0 Ethernet is unstable, cannot connect with SSH, useDns, mtu change - did not help. WiFi is not initialized anymore. I can confirm there is no file. I tried to fix it with AI help and did a lot of stuff, nothing worked. Bu once decreasing speed to 100 ethtool -s end0 speed 100 duplex full autoneg on it started to work. Now I can connect via SSH and apt update work as well.

On other fora it is nowadays forbidden to post AI content. I would use same here. So you need to google yourself. Or just 'man dpkg'

There were changes merged fairly recently. Perhaps try this: https://github.com/armbian/build/pull/9600