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ctrl+alt+f1( or f2...) is a black screen. (Ubuntu20.04, Gnome, gdm3)

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Ubuntu 20.04 LTS startup with gdm3 can normally show the login window.enter image description here But, When I type ctrl+alt+f1( or f2...), the screen goes black.enter image description here I'm a beginner. I've tried every "fix" I've found online, but to no avail. I don't know where the problem is.

Arjun K Shibu avatar
jp flag
Do you see a cogwheel icon on bottom right corner before login.
Guojun avatar
no flag
Thanks for your reply. I found that kernel had disable "CONFIG_FRAMEBUFFER_CONSOLE" . So enable it solved my problem.
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