I am running Manjaro KDE in an year old Thinkpad X260 which comes with a good battery that lasts for almost 8hrs. A week back I noticed that the battery-panel indicator becomes red (when it is at 10% level) in shorter duration of time than usual. Its only when this happened repetitively, I thought something might be wrong with the battery. Regardin this situation, I have two questions:
1) What does this mean
After a 100% charge , when i checked the battery applet in the panel, it showed that around 4hrs remaining (which is half the usual).
Below are the outputs of few relevant commands
[varun@thinkpad ~]$ acpi -bi Battery 0: Discharging, 88%, 02:57:19 remaining Battery 0: design capacity 3953 mAh, last full capacity 2465 mAh = 62%
tlp stat output:
+++ Battery Status /sys/class/power_supply/BAT1/manufacturer = SANYO /sys/class/power_supply/BAT1/model_name = 45N1767 /sys/class/power_supply/BAT1/cycle_count = (not supported) /sys/class/power_supply/BAT1/energy_full_design = 47520 [mWh] /sys/class/power_supply/BAT1/energy_full = 29640 [mWh] /sys/class/power_supply/BAT1/energy_now = 25810 [mWh] /sys/class/power_supply/BAT1/power_now = 6180 [mW] /sys/class/power_supply/BAT1/status = Discharging Charge = 87.1 [%] Capacity = 62.4 [%]
Both of these show that the capacity of the batter is only 62%. Does this mean that one of the battery cells konked? (this post suggests so)
2. Unable to recalibrate
I thought of using
tlp recalibrate command; but in order to run that I need to install
acpi-call-dkms. I tried to install them from community repo. But I am getting the following warning:
[2018-05-30 18:35] [ALPM-SCRIPTLET] ==> No kernel 4.14.44-1-MANJARO headers. You must install them to use DKMS!
I think both smpai and acpi are not installed properly. So, how to resolve
No kernel headers problem? I already tried uninstalling and installing dkms.