I think this is due to the fact that the DRM graphics driver has not yet loaded in early boot. So secondary displays are not supported in that phase. See also bug 2163619.
** Package changed: xorg (Ubuntu) => initramfs-tools (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2169160 Title: When using FDE at boot display using USB-C to DP fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/2169160/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
