On Thu, 6 Sep 2012, Florian Merz wrote: > Hi, > > To enable usb autosuspend i use the following in a script after booting: > for i in `find /sys/bus/usb/devices/*/power/control`; do echo auto > $i; done; > for i in `find /sys/bus/usb/devices/*/power/autosuspend`; do echo 2 > $i; done; > > After this new usb devices aren't recognized anymore. Whether 'lsusb' nor > 'dmesg' show up anything. Do you mean that if you plug in a new USB device, nothing happens? Or do you mean that some USB devices which were present during boot don't get detected? Are the undetected devices attached to a USB-2 port or a USB-3 port? > When i turn the usb port back on manualy: (echo on > > /sys/bus/usb/devices/3-1/power/control) the usb device shows up. > > Since this is my first bug report I'll just add what I think is helpful. > > % lspci | grep -i usb > 00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family > USB xHCI Host Controller (rev 04) > 00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family > USB Enhanced Host Controller #2 (rev 04) > 00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family > USB Enhanced Host Controller #1 (rev 04) > > My system is a Lenovo Thinkpad x230. > > I'm using arch linux with linux-mainline kernel > (https://aur.archlinux.org/packages.php?ID=50893) What is the kernel version? Can you build a kernel with CONFIG_USB_DEBUG enabled and then post the output from "dmesg" showing what happens during boot and after you turn the port back on manually? 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
