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ARM, Linux

ARM64 cannot output Linux kernel message to VGA

If you tried every way on output to Linux kernel, but nothing work. Probably that’s because SPCR(Serial Port Console Redirection Table), and this option default is enable.

Just disable it in your BIOS and add “console=tty0” to /etc/default/grub, then update grub.cfg. it will work.

In AMI BIOS, it should be in the Advanced->Serial Port Console Redirection->Console Redirection

Set it to [Disabled]

[RFC PATCH v2 0/3] Prefer working VT console over SPCR and device-tree chosen stdout-path