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13

SGX disabled by BIOS message on Ubuntu 20.04 booting

rated 0 times [ 13] [ 0] / answers: 1 / hits: 22217 / 2 Years ago, sun, april 10, 2022, 11:15:42

A few days ago I realize that the following message appears when booting Ubuntu 20.04 (it didn't appear before):

[   0.113770] x86/cpu: SGX disable by BIOS.

After a little research I found other people having this "problem".
On the cases I saw the OS didn't even boot after that error (it seems because the OS doesn't detect the disks) but that's not my case, my disks are detected correctly and Ubuntu 20.04 starts as nothing happens.

So for me isn't really a problem but I'm concerned that it can turn into one. So I want to know if there's a solution.
I searched on my BIOS but I didn't see an option that allows me to enable the SGX.

My Motherboard and CPU are 'MSI H510M Pro-E' and 'Intel Core i5 10400'(I use the integraded graphics, specifically are called 'Intel HD Graphics 630')

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breadoules

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answered 2 Years ago hreadsoplet · Accepted Answer

x86/cpu: SGX disable by BIOS

It started to show when you upgraded to kernel 5.13.

SGX stands for "intel Software Guard eXtensions and is "a hardware-based isolation and memory encryption mechanism provided by modern Intel® CPUs". In your BIOS you might find a switch with 2 or 3 possible options:

Disable

Enable: all of the SGX instructions and resources are available to applications

Software Controlled: SGX can be enabled by software applications when asking for it.

If the option is not there you might get it through a BIOS upgrade.
Otherwise if you want to get rid of it add nosgx to the grub defaults (see How do I add a kernel boot parameter? on how to add a parameter). It is not needed as it is benign so simply ignoring it is also an option.