I tried again :
There is still a black screen with the same message.
error: no suitable video mode found.
booting in blind mode
But the installer obviously starts because, though I get a black screen,
there is a fuzzy blurry corrupted 10-pixel wide line on the top of the
screen. This line displays the recognizables blue and red colors of the
installer. And pressing TAB (to change selected menu entries of the
installer) modify its appearance. But it's impossible to go further.
There is no much help about it on the internet (I feel unconfident in
tampering with EFI and the few options I gave to grub like
"gfxpayload=800x600x16" have no effect).
Kind regards
