https://bugzilla.kernel.org/show_bug.cgi?id=218343
Bug ID: 218343
Summary: discharge rate not reported
Product: ACPI
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: Power-Battery
Assignee: acpi_power-batt...@kernel-bugs.osdl.org
Reporter: marvi...@gmx.de
Regression: No
Hi,
I noticed a strange phenomenon while trying to find out the power consumption
of my notebook (HP Elitebook 850). While AC plugged in, the charging current is
shown in /sys/class/power_class/BAT0/current_now, but when I unplug it, the
current rate is unavailable:
/sys/class/power_supply/BAT0# while /bin/true; do cat current_now; sleep 1;
done
--- with AC ---
254000
253000
253000
253000
--- unplug AC ---
0
cat: current_now: No such device
cat: current_now: No such device
cat: current_now: No such device
cat: current_now: No such device
cat: current_now: No such device
--- plug AC ---
0
0
0
0
242000
290000
286000
285000
^C
I already "debugged" that in battery.c that for unplugged state the rate
returned is indeed "-1", so the output above makes sense. I just wonder if it
could report also the (more interesting) discharge current instead of the
charging current. Is there some way to better debug this, eg. by manually
reading the ACPI tables?
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