The battery charging threshold of ThinkPad is modified in Linux (UBUNTU) to solve the battery charging problem of ThinkPad in Linux.

Look this for more info: paiaptitude install TP-smapi-dkms # modprobe tp_smapi change the charging threshold: Set the start charging threshold, for example, starting from "60%: # echo 60>/sys/devices/platform/smapi/bat0/start_charge_thresh: # echo 100>/sys/devices/platform/smapi/bat0/stop_charge_thresh view charging threshold: # Cat/sys/devices/platform/smapi/bat0/* _ charge_thresh others: to prevent charging for 17 minutes (regardless of thresholds): # echo 17>/sys/devices/platform/smapi/bat0/inhibit_charge_minutesto cancel charging preventation: # Echo 0>/sys/devices/platform/smapi/bat0/inhibit_charge_minutesto force battery discharging (even if connected to AC ): # Echo 1>/sys/devices/platform/smapi/bat0/force_dischargeto cancel forced discharge: # Echo 0>/sys/devices/platform/smapi/bat0/force_discharge make the settings take effect at startup (only use the same battery): it is not necessary to create your own init. d script or modify/etc/rc. local-you just need the package sysfsutils: # apt-Get install sysfsutils # sudo gedit/etc/sysfs. conf put the following in the file/etc/sysfs. conf: # Cat>/etc/sysfs. conf <EOF # For a liion battery in a thinkpaddevices/platform/smapi/bat0/start_charge_thresh = 50 devices/platform/smapi/bat0/keys = 80 eofthe init script supplied by sysfsutils load these settings on each boot. other Battery status information: To view extended battery status such as charging state, voltage, current, capacity, cycle count and model information: # Cat/sys/devices/platform/smapi/bat0/installed # Cat/sys/devices/platform/smapi/bat0/State # idle/Charging/discharging # Cat/sys/devices /platform/smapi/bat0/cycle_count # Cat/sys/devices/platform/smapi/bat0/current_now # Instantaneous Current # Cat/sys/devices/platform/smapi/bat0/current_avg # last minute average # Cat/sys/devices/platform/smapi/bat0/power_now # instantaneous power # Cat/sys/devices/platform/smapi/bat0/power_avg # last minute average # Cat /sys/devices/platform/smapi/bat0/last_full_capacity # Cat/sys/devices/platform/smapi/bat0/remaining_percent # Cat/sys/devices/platform/smapi/bat0/quota # Cat/sys/devices/platform/smapi/bat0/remaining_charging_time # Cat/sys/devices/platform/smapi/bat0/remaining_capacity # Cat/sys/devices/platform/smapi/bat0 /design_capacity # Cat/sys/devices/platform/smapi/bat0/voltage # Cat/sys/devices/platform/smapi/bat0/design_voltage # Cat/sys/devices/platform/smapi /bat0/manufacturer # Cat/sys/devices/platform/smapi/bat0/model # Cat/sys/devices/platform/smapi/bat0/barcoding # Cat/sys/devices/Platform /smapi/bat0/chemistry # Cat/sys/devices/platform/smapi/bat0/serial # Cat/sys/devices/platform/smapi/bat0/manufacture_date # Cat/sys/devices /platform/smapi/bat0/first_use_date # Cat/sys/devices/platform/smapi/bat0/temperature # In milli-Celsius # Cat/sys/devices/platform/smapi/ac_connectedthe raw status data is also available, including some fields not listed above (in case you can figure them out): # Cat/sys/devices/platform/smapi/bat0/dump