Package: linux-image-rt-amd64 Version: 6.12.38+deb13-rt Severity: normal EFI runtime services are not available when booting RT kernel, causing applications that depend on EFI variables to fail.
Steps to reproduce: 1. Boot RT kernel 2. Check: ls /sys/firmware/efi/efivars/ 3. Result: Empty Expected: EFI variables should be accessible like in non-RT kernel Additional info: - Non-RT kernel works fine - CONFIG_EFIVAR_FS=m in both kernels - CONFIG_EFI_DISABLE_RUNTIME is not set in RT kernel - Same hardware, different behavior When comparing grep -E "CONFIG_EFI*" /boot/config-6.12.38+deb13-rt-amd64 against to grep -E "CONFIG_EFI*" /boot/config-6.12.38+deb13-amd64 The result is, debian13:~$ diff config-efi-rt.txt config-efi-no-rt.txt 21c21 < CONFIG_EFI_DISABLE_RUNTIME=y --- > # CONFIG_EFI_DISABLE_RUNTIME is not set Conclusion, On RT kernels seems that CONFIG_EFI_DISABLE_RUNTIME is not set. -- System Information: Debian 13 RC3 amd64
