#1089569 efivarfs module can't find EFI Variable Filesystem on rt kernel

Package:
src:linux
Source:
src:linux
Submitter:
xiao sheng wen
Date:
2025-08-08 19:09:06 UTC
Severity:
normal
#1089569#5
Date:
2024-12-09 03:09:42 UTC
From:
To:
Hi,

  When I boot my notebook use RT kernel, efibootmgr can't use.
I'd report this to #1089080.

# efibootmgr
EFI variables are not supported on this system.

In newest 6.12.3-rt-amd64 kernel, I can run modprobe to load efivarfs module:

root@atzlinux-ce:~# modprobe efivarfs
root@atzlinux-ce:~# lsmod|grep efi
efivarfs               28672  0
efi_pstore             12288  0

But in /sys/firmware/efi/efivars directoy, it still empty.

This bug don't take place in 6.12.3-amd64 kernel, only in Debian RT kernel.


Regards,

xiao sheng wen(atzlinux)