Accessing EFI Variables in RHEL8+ RT Systems

Solution In Progress - Updated -

Issue

In Red Hat Enterprise Linux (RHEL) with Real-Time (RT) kernel, the /sys/firmware/efi/efivars directory appears empty.

This issue is observed when users attempt to access EFI (Extensible Firmware Interface) variables using libefivars.
However, when booting the same system with the RHEL8+ with a non-RT kernel, the EFI variables are present as expected in the /sys/firmware/efi/efivars directory.

Environment

  • Red Hat Enterprise Linux (RHEL) 8-RT

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content