Control: reassign -1 src:linux Control: forcemerge 956752 -1 On Fri, Aug 08, 2025 at 08:05:56PM +0200, Information BravoSystems wrote: > 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.
This should be the same as #956752 . There is a documented workaround which you can try in https://bugs.debian.org/1021245#10 . Regards, Salvatore
