Perhaps send fix here: https://github.com/armbian/build/blob/main/patch/kernel/archive/rockchip64-6.18/board-nanopi-m5-add-wifi-bt-ufs-and-misc.patch

**Board:** NanoPi M5 (RK3576) **Kernel:** 6.18.33-current-rockchip64 (#1 SMP PREEMPT Sat May 23 11:07:21 UTC 2026) **Armbian build:** v26.8.0-trunk.53 ## Problem Gigabit RX is completely non-functional on `end0` (GMAC0, `ethernet@2a220000`). The interface comes up at 1000Mb/s, TX works, but no packets are ever received. DHCP never gets an OFFER, `ethtool -S end0` shows RX counters stuck at zero. Forcing 100Mb/s via `ethtool -s end0 speed 100 duplex full autoneg off` works around the issue — RX starts working immediately. ## Root cause The DTB sets `phy-mode = "rgmii-id"` together with `rx_delay = <0x3f>`. The RTL8211F PHY in `-id` mode already applies its own internal RX delay, and the driver applies an additional hardware delay on top of it. The double delay breaks gigabit RX entirely. ``` # /boot/dtb/rockchip/rk3576-nanopi-m5.dtb — broken phy-mode = "rgmii-id"; tx_delay = <0x21>; rx_delay = <0x3f>; # <-- causes double RX delay ``` ## Fix Change `phy-mode` to `rgmii-rxid` (PHY applies RX delay internally) and remove `rx_delay`. This applies to both GMAC0 (`ethernet@2a220000`) and GMAC1 (`ethernet@2a230000`). ``` # Fixed phy-mode = "rgmii-rxid"; tx_delay = <0x21>; # rx_delay removed ``` After applying this fix gigabit works correctly at 1000Mb/s with full RX functionality. ## Workaround ```bash ethtool -s end0 speed 100 duplex full autoneg off ``` Or patch the DTB manually: ```bash dtc -I dtb -O dts -o /tmp/nanopi.dts /boot/dtb/rockchip/rk3576-nanopi-m5.dtb sed -i 's/phy-mode = "rgmii-id"/phy-mode = "rgmii-rxid"/g' /tmp/nanopi.dts sed -i '/rx_delay/d' /tmp/nanopi.dts dtc -I dts -O dtb -o /boot/dtb/rockchip/rk3576-nanopi-m5.dtb /tmp/nanopi.dts reboot ```

Android DTB itself is broken in many ways, mainly because wifi gpios from DTB do not show up in the gpioinfo output. It is more important to put the brcm4335-sdio firmware in /lib/firmware/brcm, which is missing in the armbian repository. iw phy0 info shows support of the 5GHz channels, but i don't have such access points nearby. I will check tomorrow with my dual-band AP.

It happened a few days ago that I rebuilt my complete firmware package to try something with another device. An HC4 firmware binary also automatically falls out in this process. If you like, you can put it on a microSD card (dd bs=512 seek=1 conv=notrunc,fsync if=u-boot-meson.bin of=/dev/${entire-device-to-be-used}), place the prepared microSD card in your HC4 and start it with the boot button pressed. Check whether it meets your expectations, and if all tests are successful, you can transfer it to the SPI flash.

Board: Orangepione Testing results for the three available images. Should there be more images available? Armbian_26.5.1_Orangepione_resolute_current_6.18.33_minimal.img Tested working: Boot from SD card with uboot and then to a USB SSD. Reboot Connect via ssh iperf3 after installing iperf3 gpio after installing gpiod HDMI video HDMI audio after installing mpg123 Used usb keyboard/mouse to test HDMI. Note that resolute now uses gpiod for gpio instead of sys. Gpiod had to be installed whereas trixie minimal comes with gpiod installed. Armbian_2Armbian_26.5.1_Orangepione_trixie_current_6.18.33_minimal.img Tested working: Boot from SD card with uboot and then to a USB SSD. Reboot Connect via ssh iperf3 after installing iperf3 gpio HDMI video HDMI audio after installing mpg123 Used usb keyboard/mouse to test HDMI. Armbian_26.5.1_Orangepione_resolute_current_6.18.33_xfce_desktop.img Tested working: Boot from SD card with uboot and then to a USB SSD. Reboot On HDMI connecter screen with usb keyboard/mouse Using terminal emulatori tested perf3 and gpio HDMI audio with vlc media player. Not working: Ran chromium to get to Armbian download page but took over a minute for each page to load and then the system crashed. With only 512MB RAM this system is under powered for general purpose desktop use. ubuntu_resolute_minimal.txt debian_trixie_minimal.txt ubuntu_resolute_xfce.txt