Kai Lüke
924552cfba
With no console= given the kernel will use the graphical console and if we give one console= then that will be used instead. But sometimes we want both a serial console and a graphical one to work. This would be consistent with the EFI menu and sd-boot showing on both already. It also makes the impact of a wrongly detected-but-missing VirtIO console lower when we emit it alongside of the other consoles we detect. Collect all detected consoles and emit them via console= with the same priority we used before to select them. This means for the main console there is no change but we get additional ones enabled. This helps with boot output and having a login presented, yet the main console is still special and gets the emergency output at boot (we should somehow surface that on the additional consoles but that's another topic). If we only see the graphical console (or none), we don't need to emit anything a the kernel already selects it itself. This also avoids suppressing the non-x86 kernel serial console detection. As mentioned above, the VirtIO console being wrongly added is now also less impactful. But for non-x86 ACPI case we could detect the serial so that console=hvc0 won't stop the kernel serial auto-detection.
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