Apparently it is known for quite a while (read 6 years) that UPower has some problem with dual battery systems: https://bugs.freedesktop.org/show_bug.cgi?id=55278
** Bug watch added: freedesktop.org Bugzilla #55278 https://bugs.freedesktop.org/show_bug.cgi?id=55278 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1748747 Title: Laptop turns of when secondary battery is empty while main battery is still charged. Status in linux package in Ubuntu: Incomplete Bug description: I'm using a Lenovo T460s with two batteries running Ubuntu 17.10. The indicator shows the combined charge of both batteries and I was at 40% when the laptop simply turned off. After the reboot I saw that the main battery was at 88% while the extra battery was at 0%. For some reason the OS deemed it necessary to perform an emergency shutdown without any warning. I don't know whether this is a problem in gnome power management or the kernel but please, please find a fix for this! Or provide some workaround. Best regards Christoph Grimmer-Dietrich To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1748747/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
