I'm having problem with passing any setting into BIOS through cctk (4.5 version) or smbios utility. I've tried cctk on Linux (and Windows) but apart from being able to read BIOS infos I can not save any settings. I was mostly hoping to be able to change battery charging modes on the fly without getting into BIOS. There is a dedicated Dell tool just for that but unfortunately not for Linux systems. Also it would be great to switch into S3 suspend mode (it should be supported on that laptop, according to cctk tool).

If I run something as:

smbios-battery-ctl --set-custom-charge-interval=50 90

the command returns

Custom charge interval has been set to (50, 90)

as it was executed correctly but  it doesn't when checked in BIOS.

Similar thing happens when I try:

cctk  --Virtualization=disabled
Virtualization=Disabled

Also dmesg returns lots of that when I run "cctk -h":

[ 1151.969158] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969234] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969307] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969380] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969453] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969526] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969598] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969671] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969743] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969818] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969892] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.969966] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.970038] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.970110] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.970182] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.970255] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1151.970328] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     36f
[ 1152.008166] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     42b
[ 1152.008243] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     42b
[ 1152.008317] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     42b
[ 1152.008390] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:     42b
[ 1152.336334] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:    900c
[ 1152.515204] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:    8054
[ 1152.515281] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:    8054
[ 1153.166080] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:    8008
[ 1153.166157] dell-smbios A80593CE-A997-11DA-B012-B622A1EF5492: Invalid call 0/0:    8008

 Am I missing something? I seem to have all necessary modules loaded:

lsmod |grep dell
dell_rbu               20480  0
dell_laptop            28672  0
dell_wmi               20480  0
sparse_keymap          16384  1 dell_wmi
dell_smbios            32768  2 dell_wmi,dell_laptop
ledtrig_audio          16384  2 snd_hda_codec_generic,dell_laptop
dell_wmi_descriptor    20480  2 dell_wmi,dell_smbios
dcdbas                 20480  1 dell_smbios
dell_smm_hwmon         16384  0
video                  53248  2 dell_wmi,dell_laptop
dell_rbtn              20480  0
wmi                    36864  4 dell_wmi,wmi_bmof,dell_smbios,dell_wmi_descriptor
rfkill                 28672  11 bluetooth,dell_laptop,dell_rbtn,cfg80211
i8042                  32768  1 dell_laptop