On Thu, 2 Aug 2018, Muni Sekhar wrote: > I see that CONFIG_PM_RUNTIME & CONFIG_USB_SUSPEND are not enabled. Is that fine? The CONFIG_PM_RUNTIME and CONFIG_USB_SUSPEND symbols are no longer used. > The device is using btusb driver. Does unloading the driver helps? It should. > I ran ‘lsof’ and and I see that the USB device was being held open by > fwupd, not sure what is ‘fwupd’? It is a firmware update daemon. > # sudo lsof +D /dev/bus/usb > lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs > Output information may be incomplete. > COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME > fwupd 1631 root 49u CHR 189,67 0t0 547 /dev/bus/usb/001/068 > > > So I killed that process(fwupd), but still device is not going to SUSPEND mode. > > # sudo lsof +D /dev/bus/usb > lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs > Output information may be incomplete. > > > # cat /sys/bus/usb/devices/1-1.3/power/runtime_status > active Well, keeping the device might or might not prevent it from being suspended. It all depends on how the driver is written. But if you unload the driver then the device certainly ought to go into runtime suspend. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
