I've been using Ubuntu 13.10 on my Lenovo for more than 5 months without a problem. Yesterday I disconnected the AC adapter to take the laptop with me to the couch and it simply shut down. So I reconnected it to at least be able to check what was going on and, to my surprise, the OS seems to be recognizing the battery as it always did. This is the result of dumping
Device: /org/freedesktop/UPower/devices/line_power_ACAD native-path: ACAD power supply: yes updated: Sun 26 Jan 2014 08:48:06 PM EST (757 seconds ago) has history: no has statistics: no line-power online: yes Device: /org/freedesktop/UPower/devices/battery_BAT1 native-path: BAT1 vendor: COMPAL model: PABAS024 serial: 3658Q power supply: yes updated: Sun 26 Jan 2014 09:00:40 PM EST (3 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: charging energy: 23.99 Wh energy-empty: 0 Wh energy-full: 31.16 Wh energy-full-design: 48.84 Wh energy-rate: 0 W voltage: 11.848 V percentage: 76% capacity: 63.8002% technology: lithium-ion Daemon: daemon-version: 0.9.22 can-suspend: yes can-hibernate: no on-battery: no on-low-battery: no lid-is-closed: no lid-is-present: yes is-docked: no
Yet, I still can't use the battery... It's as if the OS knew the battery was there but couldn't switch to it whenever the AC adapter is disconnected. The battery icon, by the way, is always full.
Lenovo Ideapad Z460
Intel Core i5 CPU M 480 @ 2.67GHz × 4
Ubuntu 13.10 (64-bit)