Armbian doesn't detect Orange Pi 4 lts all 4GB of ram

[Kamar]

Hi! I have got Orange Pi 4 lts with 4 gb ram version. I made flashed sd card using Armbian-Imager using jammy_current_6.6.31 minimal. My problem is OS detects only 3gb (2.91) of 4gb. And i investigated and googled, spent more enough time to fix it but still fail. It is not likely reservation. also tried with bookworm the result is same 3gb. with noble minimal the board doesn't boot at all. what can i do to make os detect all 4 gbs. Maybe there was some similar issue before and i missed? Many thanks, appreciate any help!

[Werner]

31 minutes ago, Kamar said:

jammy_current_6.6.31

This is quite old. Isn't there anything more recent? Perhaps this was fixed at some point already.

[Kamar]

Yeah i wanted to switch to noble minimal but it did not boot at all. noble i installed using armbian imager + online install. I think the problem is there are 3gb versions of opi 4 lts also and maybe all images are designed for those 3gb versions for compatability? Maybe there is some way to manually change that ram size config? inside device tree i could not find memory reg. Maybe it is related to uboot