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grub-fix.md

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Add Support for GRUB_EARLY_INITRD_LINUX_CUSTOM

On Ubuntu old default grub package there's seem to be a bug (https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1878705) preventing the use of GRUB_EARLY_INITRD_LINUX_CUSTOM option. The bug is fixed on grub-common 2.04-1ubuntu26.3 however this page is preserved for future reference.

Option 1 - Patching the config generator

(This is no longer necessary, see above)

Download the 10_linux.patch from this repo and move it to /etc/grub.d

cd /etc/grub.d
# Backup original
cp 10_linux ../10_linux.orig

# Patch
patch <10_linux.patch

# Update grub
update-grub

Option 2 - Manually edit grub.cfg

(This is no longer necessary, see above)

Open /boot/grub/grub.cfg and search for the every line starting with initrd followed by initrd image

initrd /boot/initrd.img-5.8.0-050800-generic

Add /boot/acpi_s3_override in the middle

initrd /boot/acpi_override /boot/initrd.img-5.8.0-050800-generic