On Tue, May 23, 2017 at 3:21 AM, Alan Stern <st...@rowland.harvard.edu> wrote: > On Mon, 22 May 2017, Kai-Heng Feng wrote: > >> So in order to detect SD card under runtime PM, it's a perfectly >> normal behavior, right? > > Yes.
Thanks for the info. > >> Sorry for not explaining the original question well enough - the real >> problem is that after enabling runtime PM on EHCI, the two physical >> ports on the right side of the laptop no longer response to any >> device, e.g. an USB storage or an USB mouse. > > Please collect two usbmon traces: one with runtime PM disabled and one > with runtime PM enabled. For each trace, start with nothing plugged > into the right-side ports. Then after the trace has been running for a > second or two, plug in a device. Stop the trace a couple of seconds > after that. Output of `cat /sys/kernel/debug/usb/usbmon/1u`: Runtime PM disabled as attachment. It's empty when runtime PM is enabled. Thanks.
rpm-disabled
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