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My

sysfs
has details on current, voltage etc under the battery node
/sys/class/power_supply/BATn
. However, under the
AC
node, none of these details are available.

I’d like to know how to go about determining what the problem is,

  • Doesn’t the hardware provide the data?
  • Do I lack a kernel module?
  • Some detail lacking in BIOS?
  • Any other questions that should be asked?

My kernel is 5.12.6 (archlinux)