> Do those phones have UEFI and ACPI support, or SBSA[2] support? If so, can you point me to where I can read more about it?
This question is beyond my knowledge, but you can already install >17 operating systems on Pinephone (https://xnux.eu/p-boot-demo/) and >3 on Librem 5 (PureOS, Mobian, postmarketOS [1]), so it should be there.
It doesn’t have UEFI–it uses u-boot instead. To test whether it has ACPI support, someone who has the phone should do this:
sudo apt install acpi
acpi -V
To determine its level of SBSA would take hours of reading the spec and testing each thing in the spec, and I doubt that very many people care about SBSA.
For example, on ARM servers I can load this generic ISO[1], and it will work. I can't do that with a Raspberry Pi, however.
Do those phones have UEFI and ACPI support, or SBSA[2] support? If so, can you point me to where I can read more about it? Google is failing me here.
[1] https://ubuntu.com/download/server/arm
[2] https://en.wikipedia.org/wiki/Server_Base_System_Architectur...