With this notebook, I am using Xubuntu 16.04 since I bought it. Since the start battery lasted less time than on Windows 10, but I didn't know why this was happening. The kernel at December 2016 was way more problematic, but nearly all the problems were solved, but this one, which reduces battery time, is still present.
I have tested the upstream kernel, and there are improvements: the package is reaching C3. While it is only one stage above, this single stage means 0,4 W of less consumption. When speaking about a system that uses 7 W, this 0,4 W means more than 5% of economy. It is still not perfect, as http://www.intel.com/content/www/us/en/processors/core/6th-gen-core- family-mobile-u-y-processor-lines-datasheet-vol-1.html states, package can reach C10, so there is still something to do. However, when installing the upstream kernel, there were warning messages: update-initramfs: Generating /boot/initrd.img-4.11.0-041100rc8-generic W: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_01.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_guc_ver9_14.bin for module i915 W: Possible missing firmware /lib/firmware/i915/bxt_guc_ver8_7.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_huc_ver02_00_1810.bin for module i915 W: Possible missing firmware /lib/firmware/i915/bxt_huc_ver01_07_1398.bin for module i915 W: Possible missing firmware /lib/firmware/i915/skl_huc_ver01_07_1398.bin for module i915 I don't mind with bxt* and kbl*, as they are other generations processors, but there is one Skylake message, so I believe different problems can happen, and as they are related i915, I suppose it's graphics. So, while there is a improvement, it is still saving energy as it could, so I believe the bug still exists. ** Attachment added: "turbostat411rc8" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686448/+attachment/4868333/+files/turbostat411rc8 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1686448 Title: Unable to reach higher than package C2 state with Skylake processor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686448/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
