Re: Unreliable USB3 with NEC uPD720200 and Delock Cardreader

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On Thursday, October 25, 2012 07:15:58 PM Ulrich Eckhardt wrote:
> Am 24.10.2012 23:13, schrieb Bjorn Helgaas:
> > On Wed, Oct 24, 2012 at 3:10 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote:
> >
> >> It can be disabled by writing "on" to the controller's
> >> /sys/devices/.../power/control file.
> >
> > Ulrich, if you boot in the working situation and write "on" to the
> > control file as above, can you still reproduce the failure?
> 
> I have done first a cat to the control file which returns already on:
> 
> uli:/ # cat /sys/devices/pci0000\:00/0000\:00\:04.0/power/control
> on
> 
> Writing again on to the file does not change anything.

Yes, and this means that runtime PM is disabled on the controller.

ASPM remains as a possible culprit, then.

Can you please boot with pcie_aspm=off in the kernel command line and see
if this makes a difference?

Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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