In Tumbleweed EFI pstore backend is active due to P: /devices/platform/efivars.0 L: 0 E: DEVPATH=/devices/platform/efivars.0 E: MODALIAS=platform:efivars E: SUBSYSTEM=platform E: USEC_INITIALIZED=25091896 E: ID_PATH=platform-efivars.0 E: ID_PATH_TAG=platform-efivars_0 uefi:~ # modinfo platform:efivars filename: /lib/modules/5.17.1-1-kvmsmall/kernel/drivers/firmware/efi/efi-pstore.ko.zst alias: platform:efivars uefi:~ # cat /sys/module/efi_pstore/parameters/pstore_disable N uefi:~ # grep PSTORE /boot/config-5.17.1-1-kvmsmall CONFIG_EFI_VARS_PSTORE=m # CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE is not set so dumps get written to NVRAM but nothing cleans them up - systemd provides systemd-pstore service, but it is part of systemd-experimental package that is not installed by default. Should EFI pstore backend be enabled by default? It is explicitly disabled in SUSE/Leap if (!backend && !strcmp(psi->name, "efi")) { pr_info("Efi pstore disabled, enforce via pstore.backend=efi"); pr_info("On a broken BIOS, this can severely harm your system"); pr_info("Only enable efi based pstore when you know what you are doing"); return -EINVAL; }