TrueOS EFI boot re-configure, from legacy PCBSD update using GRUB.

TrueOS_EFI_boot_manual_setup.txt.md

These instructions were originally written for use of GELI with EFI on TrueOS. They can also be applied to "upgraded" installs, which are coming from PCBSD.. see: [trueos/trueos-core#114]

This may help you manually setup EFI booting

...as TrueOS does not support GRUB and upgrades using pc-updatemanager will not affect available boot environments in, using a GRUB boot loader.

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This is what I did to get it working

Boot the TrueOS installer
Open the shell
Clear the existing partitions

gpart destroy -F /dev/ada0

Set GPT on the disk

gpart create -s GPT /dev/ada0

Create a new 100M EFI partition, format i and copy the boot file over

gpart add -t efi -s 100M -a 1M -l EFI /dev/ada0 newfs_msdos -F 16 -L FreeBSD_EFI /dev/ada0p1 mkdir /tmp/efi mount -t msdosfs /dev/ada0p1 /tmp/efi mkdir -p /tmp/efi/EFI/BOOT cp /boot/boot1.efi /tmp/efi/EFI/BOOT/BOOTX64.EFI umount /dev/ada0p1

Start the Installer, and go into "Advanced"
Instead of selecting "Use entire disk", changed the dropdown to be the
unused space

Continue install as normal

After the installation completed I rebooted and was able to boot successfully from ada0. I still have graphical corruption on each boot however the issue resolves itself by the time the desktop starts.

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In my case I was not doing an install, as that was already completed. My issue was that upgrades performed by pc-updatemanager created new boot environments and they were not recognized on the GRUB loader selection.

After umount of EFI partition and reboot, I was brought to TrueOS EFI prompt. The Latest BE's were available, latest active / selected - as expected.

I'll update this gist, if any further changes are necessary for EFI booting.