I recently updated my Orange-Pi-PC2 to Debian 13 (trixie). Image: "Armbian_community_26.2.0-trunk.7_Orangepipc2_trixie_current_6.12.58_minimal.img.xz". Everything works now, and the issue mentioned above no longer exists! Maybe it will be useful to someone... However, I still had to make some adjustments to "/boot/dtb/allwinner/sun50i-h5-orangepi-pc2.dtb" sun50i-h5-orangepi-pc2.dtb: Overclocked the processor to 1.44 GHz (new board revision 1.368 GHz CPU!); Similar to the other firmware versions, I configured the red LED as a power indicator (constantly lit) and the green LED as a heartbeat indicator. For everything to work, you also need to correct the parameter MAX_SPEED=1440000 in the file "/etc/default/cpufrequtils" cpufrequtils.

No need to recompile, rk322x already have had all the right bits in the right place for years. Everything is written down in the first page of the thread for rk332x tv boxes (What works: ---> Hardware video acceleration) in the hope people read it.

Good that you posted serial console output. A bit more and text (starting at power on when U-Boot starts) would be clearer, but I think the 2 top lines with 'Android' mentioned already indicate what is wrong I think; ROCK3C has SPI-flash where also the bootloader (U-Boot usually) can be stored and this has priority over SD-card bootloader. So it seems older/incompatible Android U-Boot variant in the SPI-flash loads Linux and as you use mainline Linux kernel, this won't work correctly as you see. On my ROCK3A, almost similar SoC I get all sorts of strange crashes/hangs in that situation. So use MaskROM mode to wipe SPI-flash or write a correct U-Boot version to it; see https://docs.radxa.com/en/rock3/rock3c/low-level-dev/3c-maskrom?host_os=Linux_MacOS Other option maybe is to boot with an image that has vendor kernel (I use 6.1.115 on my ROCK3A with legacy U-Boot) so then the board can be operated via serial console and from there write the SPI-flash with dd or flashcp (see /dev/mtd*).

Thank you @KhanhDTP. I think I have a pretty good handle on how (and your post on that thread was in particular very helpful, thank you). It looks like a lot of people here are desktop optimized. My plan is headless, so expectation is 25.11.1 / 6.1 and libMali route but with RKNN (XFCE only for occasional desktop, Gnome is too hungry, XFCE + X11 + software rendering is fine on rare occasions I'd need it). I think the question I was trying to ask is more along the lines of understanding what to expect for the default, and if it made sense to enable one of the drivers by default, but I'm realizing there are proprietary dependencies and enough obscure use cases that this gets more challenging. Thanks to everyone for all of the thoughts, hard to imagine navigating all of this without your contributions.

Noble image didn't boot on Orange pi 4A