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I know this subject was already treated, and I found a "fix" to bypass this black screen thanks to this answer (LUKS encyption part): My computer boots to a black screen, what options do I have to fix it?

So, if when the black screen appears, I just press Alt + ← and then Alt + → to switch my tty, I have now the password asking screen for the decryption.

It's cool, I can now boot ! But what can I do to fix this problem definitively ?

EDIT: THIS TRICK DOESN'T WORKS: When grub is loaded (it's not at each boot, sometimes that display directly the black screen), I can edit the grub entry via the 'e' key and add to the "linux..." line the "readon.modeset=0" command. With this, it works again and I can access the password asking screen.

So if you have a solution to fix this problem definitively, I'll happy to read it.

Thanks for your help

EDIT: I made a mistake: the workaround with grub doesn't work (modeset=0 or nomodeset), however I don't need to do Alt + → and alt + ← when i'm facing the black screen, a simple Left or Right are enough.

Community
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Slot
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1 Answers1

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you can change your /etc/default/grub settings to include modeset. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"

then update grub

sudo update-grub

https://wiki.debian.org/KernelModesetting http://ubuntuforums.org/showthread.php?t=1631395

Frank Schrijver
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  • I just edit my post. This trick doesn't work, I just made a mistake when I test this. Sorry for that and thank you for your answer. – Slot May 19 '16 at 15:12