On Sun, Jan 12, 2014 at 09:08:40PM +0800, yoma sophian wrote: > I can see the HD mounted when I change to NO CONFIG_PM kernel. > > Would you please tell me where we can get the conclusion that failure > comes from this device has some problem with runtime power > management? Oliver was looking at the parts of the log that were failures from the USB 3.0 Link PM being enabled: [ 474.613800] usb 4-1: Enable of device-initiated U2 failed. [ 474.617303] usb 4-1: Disable of device-initiated U1 failed. [ 474.620807] usb 4-1: Disable of device-initiated U2 failed. ... [ 474.624340] usb 4-1: Set SEL for device-initiated U1 failed. [ 479.629776] usb 4-1: Set SEL for device-initiated U2 failed. If you turn off CONFIG_PM, it disables USB 3.0 Link PM as well. I'll send you a patch shortly that may help with this issue, please test it. > BTW, the message "Timeout while waiting for address device command" > mean this device is not supported to get first command as set address? Actually, it seems like your USB device gets partially enumerated, and then disconnects, reconnects, the address device command fails, and then it disconnects and reconnects again. That's worrisome. Are you sure your USB cable isn't bad? Or perhaps the device is under powered? Is it a self-powered device (has a power supply) or a bus powered device (no power supply)? Sarah Sharp -- 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
