I recently acquired the HDK8150 board. I am pretty interested in running a non-Android Linux OS there. After some hours of going through I found some interesting stuff:
I found that from Linux kernel 5.4, is supporting Snapdragon 855, so far so good!
There is one Ubuntu distribution named Ubuntu Core. It seems it fully supports Snapdragon, but it is pretty bound to the DragonBoard-410C.
I found that there is an Ubuntu's parallel project named Linaro that looks pretty nice.
My point is that I would like to check out any of them, but I prefer not to flash the eMMC memory, but run the system from the SD card. I found it better, since I am pretty sure I am gonna mess up with something, and I am just starting with this. Is there anybody that has experience on this topic with this specific board? Is there any way to boot from the SD card? (It can be seen on the back that there are 8-switches labeled as "boot". There is no much documentation out there apart from the Quickstart guide.)
Any suggestions on which OS to use?