Hi, Bjorn, On Wed, 2012-07-25 at 06:08 +0200, Bjørn Mork wrote: > Enabling autosuspend for USB causes hotplug failure in the current > linux-next. Newly plugged devices are not detected at all until the > port/controller is manually powered on by writing "on" to power/control. > Testing is pretty simple: > > 1) for f in /sys/bus/usb/devices/*/power/control; do echo auto > $f; done Have you done: for f in /sys/bus/pci/devices/*/power/confol; do echo auto > $f; done ? If not, the pci device will not be suspended at all. > 2) wait for the controllers to suspend > 3) plugin a new USB device After plugin the new USB device, is there anything in dmesg? > > I've bisected the regression down to this commit: > > > commit 448bd857d48e69b33ef323739dc6d8ca20d4cda7 > Author: Huang Ying <ying.huang@xxxxxxxxx> > Date: Sat Jun 23 10:23:51 2012 +0800 > > PCI/PM: add PCIe runtime D3cold support > > > Looks like this somehow powers down my USB host controllers in such a > way that they are unable to detect connections to their ports. The > system is a pretty standard 4 year old intel based laptop. Full lspci > listing is attached. > > Please let me know if you need further information. And please fix this > before rc1. It effectively makes USB non-functional if autosuspend is > enabled. Can you provide the output of the following command lines? grep . /sys/bus/pci/devices/*/power/* grep . /sys/bus/usb/devices/*/power/* lsusb After the controllers suspended. Best Reards, Huang Ying -- 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
