Presently I have kernel 3.13.0-48-generic installed (from the automatic
updates). With Bluetooth and WiFi off I am able to bring the discharge
rate down to 12 W/h. Although now I have battery lifetimes in line with
those I had with Ubuntu 12.04, there is still a long way to go to catch
Windows.
A Windows user reports a discharge rate of 7-8 W/h running Word, with
WiFi and Bluetooth off:
http://forum.notebookreview.com/lenovo/574678-thinkpad-t420s-owners-
thread-10-print.html
With kernel 3.17 and no programmes running the discharge rate is about
the double of that.
Reagrds.
--
You
I managed to install and run the mainline kernel (3.17). With it the
battery discharge rate is dramatically down, about half of what it is
with kernel 3.13 (~ 15W), but still above what it was with Ubuntu 12.04.
Also, with kernel 3.17 it seems the automatic screen dimming is not
working.
Cheers.
** Package changed: ubuntu-release-upgrader (Ubuntu) = linux (Ubuntu)
--
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/1347539
Title:
Abnormally high battery discharge rate on Lenovo T420
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.17 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
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