installing akmod-nvidia makes tty console and boot splashscreen ugly

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I installed akmod-nvidia on fedora26 (but I don't think this is a release-specific issue) and now the resolution of tty console and boot splashscreen is quite small, making it difficult to work with the virtual ttys (which I tend to do).

I saw several posts on forums but each time the "solution" ended up wrecking something in the OP's system, so I'm not ready to hack my system alone. I also saw this howto but as soon as I type "insmod vbe" in the grub console I get a file not found error, so I'm not very keen on going further alone there, seeing that even the basic starting command is not working...