On Tue, 2014-06-24 at 21:31 +0900, Taeung wrote: > I guess that 'usb usb1: rpm_suspend...' have relevance to the core of > this problem. > or Is this problem about hardware ? > > If you tell a bit hints me , I'd appreciate it. I doubt it. You can load usbcore with autosuspend=-1 to test. But even if that is the case, your kernel is too old for anybody but yourself to fix it. Regards Oliver -- 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