[Answered] External displays not active during boot [12th Gen docked on Anker 777 TB4]

[Matt_Hartley]

@Anachron

If I understood it correctly you can’t do it like that. Can you try to only use D (digital output) on one of the monitors (external one) and just e (enable) the other one (internal)?

See example: GRUB_CMDLINE_LINUX="video=HDMI-1:D video=LVDS-1:e"

I agree with @Anachron, this example above is the general idea as this is operating outside of the normal scope of what would happen otherwise.