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2

Thinkpad X1 Carbon - terrible battery life on Raring

rated 0 times [ 2] [ 0] / answers: 1 / hits: 6732 / 2 Years ago, mon, march 21, 2022, 7:26:14

Two days ago my new Thinkpad X1 Carbon arrived. It reportedly has "up to 8.2 hours of battery life".

I installed 13.04 Raring Ringtail (x64) on it a day after it was released, and then gnome-shell.

Now, with wireless, mobile internet and bluetooth all turned off, and screen brightness reduced, it reported 3 hours of batter life at 100%, and given how quickly it's decreasing that seems to be accurate.

Results I got from googling:

No-one on this forum question mentioned issues with battery life...

someone suggested that Ubuntu might not manage the fan properly (although I haven't noticed excessive noise) so I installed thinkfan including running sensors-detect as suggested under "troubleshooting".

some else recommended some special grub boot options, but I didn't understand them and in the comments someone suggested they might no longer be necessary

I'm going to try rebooting into Windows now to see if it performs better. If it doesn't I'll contact Lenovo support and call it a hardware issue - and of course update this question.

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odyroc

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answered 2 Years ago imberst · Accepted Answer

I have a Lenovo X1 and battery life is MUCH longer than 3 hours with Raring. I also make sure I reduce my screen brightness when on battery, and have the following entries in /etc/modprobe.d/powersaving.conf:

    options i915 i915_enable_rc6=7

    options i915 i915_enable_fbc=1

    options i915 lvds_downclock=1

I had these with 12.10 and they seemed to help. I would also recommend installing powertop, and then running it occasionally to see if you have any rogue processes sucking up power.