Hi,
> Ok, xhci is reset in resume in your case (indicated by the "root hub lost power or was reset" messages)
> That patch adds an additional check that ensures there was some event before resuming the roothub.
>
> Could you try out the following and see if it helps? If the event is lost/cleared during reset
> then this change should work.
Sure. What version is this patch against? I did "patch -p1" with
v4.1-rc2 checked out, and all three hunks fail.
> Can you try with auto-pm disabled for PCI xHCI host?
>
> # echo 'on' | tee /sys/bus/pci/devices/*/power/control
I'll also try the PM settings mentioned by baolu. In fact, he reminded
me that I added the following udev rule to save some power (and powertop
got happy ;-):
ACTION=="add", SUBSYSTEM=="pci", ATTR{power/control}="auto"
Sorry that I forgot to mention this.
(I'll do all this tomorrow.)
Kind regards,
Ralf
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