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I tried again : There is still a black screen with the same message. 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 |