I am having an issue screen resolution with Live Boot of Fossapup and Xenial64 from USB. Both are UEFI-64 boots.
Power on and boot with USB - screen resolution is always 800x600 and cannot be changed
Power on, select Boot Menu (F10), select USB and continue boot, screen resolution is 1920x1080 and can be changed
Resolution difference can be see already when "Loading vmlinuz" text appears on the screen.
Hardware is NUC11TNHi3 (and earlier version NUC7)
No hard drives are installed, only the boot USB
Fossapup USB was created using Rufus 3.17 in Windows10
Xenial64 USB was created using GParted and Frugalpup-37 in Fossapup
Everything else seems to work perfectly, only issue is screen resolution. While I have been a software engineer for years, puppy linux is an OS only used for one application in our company, so my experience is limited.
What is different between a default boot from USB, or selecting F10 to choose the USB?