kernel 3.16 causes reduced battery life "the second" Core2Duo

xe3tec · 2014-09-01 02:48:43

Since https://bbs.archlinux.org/viewtopic.php?id=186020 was declared as solved I have to make a new thread.

I have a Thinkpad X200 with a Intel Core2Duo T5800 2,53ghz and since the Kernel Upgrade I lost 2h battery life, from 5:20 to 3:05 (says the batt app and the clock too +-). So it is not the haswell issue.

Anyone got any idea?

edit: I downgraded back to 3.14 and the runtime is back to normal

Last edited by xe3tec (2014-09-01 06:20:03)

twelveeighty · 2014-09-02 01:29:35

Do have processes that are hogging the CPU after the kernel upgrade? Check with htop during "quiet" and "busy" times. Also check to see if your CPU fan spinning at high speed more often than before?

xe3tec · 2014-09-02 04:55:54

I did that and couldn't find anything to pin it down. FYI I took a blank HD and had a fresh install and directly did a -Syu . It is pretty weird

graysky · 2014-09-02 09:02:47

I read about known regressions in the intel video department, if you're using that as your video display it might explain it. Just use lts until it greets sorted out upstream.

xe3tec · 2014-09-02 10:58:54

would explain the video problems too, forgot to mention that sry
atm I am running 3.16.1-2-ck again, at least video works there and I got back to nearly 3,5h

Last edited by xe3tec (2014-09-02 10:59:48)

graysky · 2014-09-02 19:13:25

Yes, I patched 3.16.1-2-ck with upstream's fix; I also opened a FS#41683 but it got rolled into a video/suspend problem so no idea when or if the Arch devs will add it

xe3tec · 2014-09-03 02:13:03

found this http://www.phoronix.com/scan.php?page=a … ereg&num=1
I shouldnt hve touched my system

Last edited by xe3tec (2014-09-03 02:17:30)

graysky · 2014-09-03 08:50:28

So just use the lts kernel (3.14.x) until it gets untucked. https://www.archlinux.org/packages/core … linux-lts/

Last edited by graysky (2014-09-03 08:50:48)

Arch Linux

#1 2014-09-01 02:48:43

kernel 3.16 causes reduced battery life "the second" Core2Duo

#2 2014-09-02 01:29:35

Re: kernel 3.16 causes reduced battery life "the second" Core2Duo

#3 2014-09-02 04:55:54

Re: kernel 3.16 causes reduced battery life "the second" Core2Duo

#4 2014-09-02 09:02:47

Re: kernel 3.16 causes reduced battery life "the second" Core2Duo

#5 2014-09-02 10:58:54

Re: kernel 3.16 causes reduced battery life "the second" Core2Duo

#6 2014-09-02 19:13:25

Re: kernel 3.16 causes reduced battery life "the second" Core2Duo

#7 2014-09-03 02:13:03

Re: kernel 3.16 causes reduced battery life "the second" Core2Duo

#8 2014-09-03 08:50:28

Re: kernel 3.16 causes reduced battery life "the second" Core2Duo

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