Battery not detected

Solution 1:

Usually the Laptop battery is labelled BAT0. Have you tried running:

cat /proc/acpi/battery/BAT0/info

Also have you tried adding acpi=force onto your GRUB command line?

Open a terminal and run the following commands:

1. sudo gedit /etc/default/grub
2. Go to the line GRUB_CMDLINE_LINUX_DEFAULT=""
3. Replace it with GRUB_CMDLINE_LINUX_DEFAULT="acpi=force"
4. Save your changes.
5. Run sudo update-grub and reboot.

(If there is something already within the "" at Step 2 just add a space after it and add acpi=force)

Solution 2:

I know this question is a bit old, but someone may benefit from my reply. The problem is caused by an upstream kernel bug. You can view the bug report here: https://bugzilla.kernel.org/show_bug.cgi?id=24002. The last version of Ubuntu with a kernel that showed battery information from a MS-171F laptop motherboard was 9.10 (Karmic). Unfortunately, Karmic reached its end of life date in April. Hopefully they will have the problem resolved soon and it will filter down to us in an update.