Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.16 kernel. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance.  http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16-rc1/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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 : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp