hexdump

i think the arm version of the surface pro 9 is close to the devkit - surface pro x is an older design using a snapdragon 8cx gen2 (i think) and not the gen3 the devkit is using and which is a very different soc

@hartraft - there are two kernel options for mglru: CONFIG_LRU_GEN=y and CONFIG_LRU_GEN_ENABLED=y - the first is to have mglru built into the kernel and the second is to have it enabled by default - if they are not in your kernel config it might be required to rebuild the kernel with them (or at least the first) enabled

@SteeMan - in case you want to experiment (i.e. not sure if it really works), you might play around with chainloading the g12a-u-boot.bin (s905x2) and sm1-u-boot.bin (s905x3) from https://github.com/hexdump0815/u-boot-misc/releases/tag/200926-01 or gxb-u-boot.bin (s905) or gxl-u-boot.bin (s905x) from https://github.com/hexdump0815/u-boot-misc/releases/tag/200718-01 ... basic chainloading goes like this - https://github.com/hexdump0815/imagebuilder/blob/master/boot/boot-amlogic_gx-aarch64/s905_autoscript.txt - maybe compare it to the balbes150 boot scripts for fancier ways and most probably better armbian integration ... the files mostly exist in a serial version for serial console and another one for hdmi output and usb keyboard input (which sometimes works and sometimes not) ... better ignore the boot-xyz.dd file at the links above - they are for booting amlogic boxes without the legacy u-boot, but using them is quite complicated and risky (you can seriously brick the box worst case) as mentioned all this is without any warranty or support, but it might be a good starting point for experiments good luck and best wishes - hexdump