Reassigning to powertop package for a first look - I upgraded a PC
laptop to 17.10, and I am seeing two usb devices (camera and keyboard)
flagged as 100% busy and major consumers of power in powertop (whereas
they were not before the upgrade).
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Reproes with the v4.14 kernel.
Power usage on idle is
4.14:~8W
4.13:~10W
4.10:~7W
There appears to have been a significant regression in power use from
4.10 to 4.13 that has been partially addressed in 4.14.
I got curious, and I get the same 100% busy report if I boot with the
legacy 4.10.37
Public bug reported:
Just upgraded from 17.04 to 17.10 on a 2011 macbook air.
Battery drain is markedly more severe.
Looking at powertop, the main difference is that the Apple USB Bluetooth driver
is drawing ~2.5W and is showing as 100% busy.
Bluetooth is switched off.
I have tried rfkill,
re upgraded to -18 again today, problem does not repro. Potentially an
issue with a specific binary package?
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https://bugs.launchpad.net/bugs/1457672
Title:
Wireless stops
Public bug reported:
Today's upgrade from the -16 to the -18 kernel completely disables
wireless on my 15.04 ubuntu install on a macbook air 2013. Reverting to
the -16 kernel fixes the issue.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-18-generic:amd64 3.19.0-18.18
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