intel-ucode: add README

1 files changed, 34 insertions, 0 deletions

diff --git a/intel-ucode/README b/intel-ucode/README
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index 000000000..99b43d0e3
--- /dev/null
+++ b/intel-ucode/README
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+post-install
+---
+Enabling Intel microcode updates
+
+Microcode must be loaded by the bootloader.
+These updates must be enabled by adding /boot/early-ucode.cpio as the *FIRST* initrd in the bootloader config file.
+This is in addition to the normal initrd file, if you are using one.
+
+GRUB2
+---
+- Automatic method
+
+grub-mkconfig will automatically detect the microcode update and configure GRUB appropriately.
+After installing the intel-ucode package, regenerate the GRUB config to activate loading the microcode update by running:
+
+# grub-mkconfig -o /boot/grub/grub.cfg
+
+
+- Manual method
+
+Alternatively, manually add /boot/early-ucode.cpio to grub.cfg, so
+it looks similar to below:
+
+echo    'Loading Linux 4.15.3 ...'
+linux   /boot/vmlinuz-4.15.3 root=/dev/sdb1 ro rootfstype=ext4 rootfstype=ext4 quiet
+echo    'Loading intel microcode ...'
+initrd  /boot/early-ucode.cpio $OTHER_INITRD
+
+You'll have to do it for every kernel you have,
+so the use of the automagic method is reccomended.
+
+OTHER BOOTLOADERS
+---
+Patches to add them to the README welcome :)