IT/Hardware/General/BIOS

sgx disabled by bios

This is a newer warning due to a kernel upgrade.

It allows the linux kernel to interact with CPU security features developed by intel.

The message does not harm anything

You can either:

1. ignore it
2. make a change in the bios to enable the feature.
   1. the cpu may be capable and the bios not.
   2. If you can't find the "switch" in the bios then:
      1. Your motherboard cannot use sgx
      2. Your BIOS is too old.
   3. If after all you determine your hardware cannot use sgx then you can hide it
3. add nosgx as a boot parameter.
   1. In the file /etc/default/grub you add nosgx in the follwoing section
      1. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nosgx"
   2. sudo update-grub
   3. reboot and you will no longer see the error message.

Boot Errors

Since upgradeing to 22.04 there are lots of acpi errors that appear during boot and once in a while prevent a clean boot.

Open the files /etc/default/grub

add loglevel=3 to ignore those errors.

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash loglevel=3"

Will not shutdown completely

You can first test to see by doing a complete shutdown with the command

sudo shutdown -h now

If that completes then look further.