How to change grub resolution? Tried GRUB_GFXMODE=1024x768 - didnt work. And there is no vbeinfo, videoinfo grub commands
To use that option, I think you also have to change GRUB_TERMINAL_OUTPUT="console" to GRUB_TERMINAL_OUTPUT="gfxterm".
gfxterm used to be the default, but it was changed to console to avoid boot problems e.g. on SeaBIOS:
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Tried, didnt work. “gfxterm” just makes grub graphical.
Ok. I got it working. Steps to fix it for others:
(1) GRUB_TERMINAL_OUTPUT="gfxterm" indeed needed.
(2) To make GRUB_GFXMODE executing you need to create folder /boot/grub2/fonts and copy there /usr/share/grub/unicode.pf2 file
(3) To make grub command line find videoinfo command you need to install grub2-efi-x64-modules package (dunno why it is not installed by default) and copy /usr/lib/grub/x86_64-efi folder to /boot/grub2/
Done. Now you can change resolution in grub. 
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