Gigabyte B460 HD3 (rev. 1.0) - big big issues to boot : linux does not boot at all

hello dear community,

well this allmost drives me crazy - i have set up a new machine with a Gigabyte-mainbgoard:

the Gigabyte B460 HD3 (rev. 1.0)

but i have big big issues to boot : linux does not boot at all

with Gigabyte B460 HD3 (rev. 1.0) we ve got big big issues to boot : linux does not boot at all

i guess that i need to turn off all uefi things

i guess that i have to choose legacy support whereever i can
and i am pretty sure that i do not need all the windows 10 features.
what else can i do!?

look forward to hear from you
regards

note:i have t ried opensuse
but i have issue with the bios.

i think i have to

disable uefi
and secure boot

so far so good - but i do not come along with the settings -

all i can - all that is possible is to boot with a desaster recovery-stick that i have created.

note: a opensuse leap image 15.2 boots - if i start the machine and have connected the stick

see some output when it tries to bood

https://photos.app.goo.gl/AUUMTPQCLmUkpT6r6