hello , the error from "dmesg -l err" related ... -------------------------------------------------------------------------------------------------> [ 1.709950] ACPI BIOS Error (bug): Failure looking up [\_SB.PCI0.LPCB.HEC.ECWT], AE_NOT_FOUND (20180313/psargs-330) [ 1.710045] ACPI Error: Method parse/execution failed \_TZ.FN00._ON, AE_NOT_FOUND (20180313/psparse-516) [ 1.710208] ACPI BIOS Error (bug): Failure looking up [\_SB.PCI0.LPCB.HEC.ECWT], AE_NOT_FOUND (20180313/psargs-330) [ 1.710267] ACPI Error: Method parse/execution failed \_TZ.FN00._ON, AE_NOT_FOUND (20180313/psparse-516) [ 1.710338] acpi PNP0C0B:00: Failed to set initial power state [ 1.710846] ACPI BIOS Error (bug): Failure looking up [\_SB.PCI0.LPCB.HEC.ECRD], AE_NOT_FOUND (20180313/psargs-330) [ 1.710938] ACPI Error: Method parse/execution failed \_TZ.TZ00._TMP, AE_NOT_FOUND (20180313/psparse-516) [ 1.711588] ACPI BIOS Error (bug): Failure looking up [\_SB.PCI0.LPCB.HEC.ECRD], AE_NOT_FOUND (20180313/psargs-330) [ 1.711681] ACPI Error: Method parse/execution failed \_TZ.TZ00._TMP, AE_NOT_FOUND (20180313/psparse-516) [ 1.711960] ACPI BIOS Error (bug): Failure looking up [\_SB.PCI0.LPCB.HEC.ECRD], AE_NOT_FOUND (20180313/psargs-330) [ 1.712054] ACPI Error: Method parse/execution failed \_TZ.TZ01._TMP, AE_NOT_FOUND (20180313/psparse-516) [ 1.712471] ACPI BIOS Error (bug): Failure looking up [\_SB.PCI0.LPCB.HEC.ECRD], AE_NOT_FOUND (20180313/psargs-330) [ 1.712552] ACPI Error: Method parse/execution failed \_TZ.TZ01._TMP, AE_NOT_FOUND (20180313/psparse-516) -----------------------------------------------------------------------------------------------------> $awk -f scripts/ver_linux If some fields are empty or look unusual you may have an old version. Compare to the current minimal requirements in Documentation/Changes. Linux debian 4.17.0-rc4+ #24 SMP Sat May 12 19:26:27 IST 2018 x86_64 GNU/Linux GNU Make 4.2.1 Binutils 2.30 Util-linux 2.31.1 Mount 2.31.1 Linux C Library 2.27 Dynamic linker (ldd) 2.27 readlink: missing operand Try 'readlink --help' for more information. Procps 3.3.14 Kbd 2.0.4 Console-tools 2.0.4 Sh-utils 8.28 Udev 238 Modules Loaded ac acpi_pad acpi_thermal_rel ahci autofs4 battery binfmt_misc bluetooth bnep btbcm btintel btrfs btrtl btusb button cdrom cfg80211 cmac coretemp cpuid crc32c_intel crc32_pclmul crct10dif_pclmul cryptd drm drm_kms_helper ecdh_generic efi_pstore efivarfs efivars ehci_hcd ehci_pci evdev fan fat fuse ghash_clmulni_intel hid hp_wireless hp_wmi i2c_algo_bit i2c_hid i2c_i801 i915 int3400_thermal int340x_thermal_zone intel_cstate intel_pch_thermal intel_powerclamp intel_rapl intel_rapl_perf intel_soc_dts_iosf intel_uncore ip_tables irqbypass iTCO_vendor_support iTCO_wdt joydev kvm kvm_intel libahci libata libcrc32c loop lp lpc_ich media mei mei_me mfd_core mii nls_ascii nls_cp437 parport parport_pc pcspkr ppdev processor_thermal_device psmouse r8169 raid6_pq rfcomm rfkill scsi_mod sd_mod serio_raw sg shpchp snd snd_hda_codec snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_core snd_hda_intel snd_hwdep snd_pcm snd_timer soundcore sparse_keymap sr_mod sunrpc thermal usbcore uvcvideo vfat video videobuf2_common videobuf2_memops videobuf2_v4l2 videobuf2_vmalloc videodev wl wmi wmi_bmof x86_pkg_temp_thermal xfs xhci_hcd xhci_pci xor x_tables xxhash zstd_compress zstd_decompress $uname -a Linux debian 4.17.0-rc4+ #24 SMP Sat May 12 19:26:27 IST 2018 x86_64 GNU/Linux $ Reported-by: Jeffrin Jose T <jeffrin@xxxxxxxxxxxxxxxxxxx> -- software engineer rajagiri school of engineering and technology -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html