It turns out that this is not as simple as described in Ubuntu Manual.
I changed boot sequence in UEFI, disabled secure boot, disabled fast boot and restarted the machine. It booted from USB stick, however the install hanged at the third step because it could not see any root filesystem – that is, it did not recognize SSD harddrive.
I googled the problem back and forth and nothing solid came out of it other than a few hints….so I had to try them one by one to see what would work.
The next thing you have to do is to disable in UEFI any RAID configuration. Of course you will get nasty warning that OH-MY-GOD-TERRIBLE-THINGS-GONNA-HAPPEN-NOW, but ignore it.
Now boot again Windows10 and make sure that you can properly shutdown your system. HINT: if you have some updates being downloaded/not installed, you not gonna know it because the default Win10 config is such that it does not tell you this. How can you know? Well. When clicking on „power off” icon, make sure that you have „shutdown” option available. If you see „Shutdown and Install Updates” this means your system is not up to date and on boot it will try to install updates automatically.
Let it finish, restart and update whatever the hell it wants, then go to power off manu. If you can see just plain „Shutdown” do it :)
Now, just in case, enter again UEFI (BIOS) and make sure that previously selected options are not changed:
– boot sequence from USB stick
– disabled secure boot
– disabled fast boot
– disabled RAID
Now you can continue with Ubuntu install uniterrupted.
BTW: it was my first install over SSD drive. Man. This thing is fucking fast, I tell ya!
Dla nie-geeków juz niedlugo będzie dużo zdjęc z mini-wyprawy cmentarnej…