If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux lappy 4.4.0-040400-generic #201601101930 SMP Mon Jan 11 00:32:41 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
 
Gnu C                  5.2.1
Gnu make               4.0
binutils               2.25.1
util-linux             2.26.2
mount                  debug
module-init-tools      21
e2fsprogs              1.42.12
pcmciautils            018
PPP                    2.4.6
Linux C Library        2.21
Dynamic linker (ldd)   2.21
Procps                 3.3.9
Net-tools              1.60
Kbd                    1.15.5
Sh-utils               8.23
wireless-tools         30
Modules Loaded         rfcomm bbswitch pci_stub vboxpci vboxnetadp vboxnetflt bnep vboxdrv binfmt_misc nls_iso8859_1 nvidia i2c_designware_platform snd_hda_codec_hdmi dell_wmi i2c_designware_core sparse_keymap mxm_wmi dell_laptop dcdbas dell_led brcmfmac intel_rapl brcmutil x86_pkg_temp_thermal rtsx_pci_ms intel_powerclamp snd_hda_codec_realtek cfg80211 uvcvideo coretemp memstick snd_hda_codec_generic videobuf2_vmalloc kvm_intel videobuf2_memops videobuf2_v4l2 btusb videobuf2_core btrtl v4l2_common kvm videodev snd_hda_intel media snd_hda_codec irqbypass snd_hda_core crct10dif_pclmul snd_hwdep crc32_pclmul aesni_intel snd_pcm aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_seq_midi snd_seq_midi_event snd_rawmidi joydev input_leds snd_seq serio_raw snd_seq_device snd_timer snd hci_uart idma64 soundcore btbcm btqca btintel virt_dma bluetooth mei_me shpchp mei processor_thermal_device wmi acpi_als dell_smo8800 int3402_thermal intel_lpss_acpi int3400_thermal intel_soc_dts_iosf intel_lpss_pci int3403_thermal intel_lpss kfifo_buf int340x_thermal_zone acpi_thermal_rel industrialio acpi_pad mac_hid nfsd auth_rpcgss nfs_acl lockd parport_pc grace ppdev sunrpc lp parport autofs4 rtsx_pci_sdmmc i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse nvme ahci drm rtsx_pci libahci pinctrl_sunrisepoint video pinctrl_intel fjes