I have been testing the R2S extensively. The 1GbE is very stable, but the 2.5GbE drops frequently. I do not have debug logs yet but it is something I need to analyze. I also have a wireless AP running on the R2S. Performance is poor: 1GbE WAN connection, but I am getting only 20Mbps throughput but it is stable.

@robertojGood afternoon. How are you? How is your health? Excuse me, but have you made any progress on writing the manual?

Device: Orange Pi 5 Plus Image: Armbian_26.2.1_Orangepi5-plus_noble_current_6.18.8_kde-neon_desktop.img.xz Installation on SD Card without issue. Ethernet works WiFi (RTW89_8852BE): Works Bluetooth: Available but did not test pairing with bluetooth device Chromium_v144: vpu hardware acceleration working USB-3.0 & USB-2.0 Ports working PCIE-NVMe: Accessible HDMI Display: working HDMI-Audio: working Headphone Jack-Audio: Working (After using alsamixer to increase "output1" volume") Out of the box, konsole (terminal-emulator) and dolphin (file manager) not pre-installed.

@Brow Mosh Have you tried extracting your arndroid dts to find the gpio settings for emmc? The only other thing I can suggest at this point is trying mainline U-Boot booted over USB (FEL). Booting mainline U-Boot via FEL completely bypasses SD.

Thank you all... I was able to install Armbian on the H96 Max M9 thanks to all of your help.