Ubuntu
linux-meta package

Please enable USB Autosuspend

Bug #193390 reported by schmolch
2
Affects Status Importance Assigned to Milestone
linux-meta (Ubuntu)
New
Undecided
Unassigned

Bug Description

I believe that USB Autosuspend is not enabled in the default Ubuntu Kernel.
My CPU (core-duo) is stuck at C2 until i enable USB Autosuspend via powertop.
Only then is it able to go to C3.

Revision history for this message
Alex Ruddick (alexrudd0) wrote :

I've noticed this issue too, and after reading about it it's unclear whether powertop or Ubuntu is at fault here.

In any case, I'm marking this as a duplicate of 136549 because there is far more information there.

Revision history for this message
schmolch (saschaheid) wrote :

I'm aware of the other Bug-report and i doubt that its powertop's fault.
Like i said is my CPU stuck at C2 until i enable USB-Autosuspend with powertop.

If you run cat /sys/bus/usb/devices/*/power/autosuspend before using powertop it will give you
0
2
2
2
2
2

After using powertop it will change to
1
1
1
1
1
1

which seem to be the correct values for a working USB autosuspension.

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