Re: Debian 11 installation not working

Albert,

If X would not launch then you would normally end up in a 'terminal' conso=
le. If it is tty type then problems like yours are unlikely. But many lapt=
ops get configured to use a framebuffer console, for better fonts and colo=
rs. Then there could be a machine specific framebuffer module issue.

I don't know if that's still valid but back in the days one could append a=
 'nofb' kernelparemeter to the grub (bootloader) menu entry. There were se=
veral other parameters achieving the same result, like 'nomodeset' or 'vga=
=3D0'.

 https://wiki.archlinux.org/title/Linux_console

If you can access the grub boot menu (where you also chose between default=
 boot or advanced, like rescue mode) then enter the grub internal editor w=
ith an escape key, i think it was 'e' - but better RTFM.

 https://wiki.debian.org/Grub

If a new kernel parameter solves the issue then you can make the setting p=
ermanent by editing the file /etc/default/grub (for Debian; which in turn =
will be applied to the /etc/grub.d/xx_linux file) to contain this kernelpa=
rameter.  You need to run the command (sudo) update-grub to activate it.


Another thing that might be worth trying is to switch to a tty console wit=
h Ctrl+Alt+F1 then back to the X screen with Ctrl+Alt+F7.  There were repo=
rts that the screen was reinitialized properly just by that.

(or just switch with repeated Alt+Arrow-left until X is reached. Which fro=
m tty1 should be just the next one to the 'left'.)