On Tue, 2 Feb 2010, [utf-8] Lukáš Karas wrote: > Hi All, here is dmesg log with enabled CONFIG_USB_DEBUG option. > > http://bugzilla.kernel.org/attachment.cgi?id=24876 And here in the log is the explanation: > [ 136.971239] usb 3-4: usb suspend > [ 136.977281] ehci_hcd 0000:00:13.2: port 4 remote wakeup > [ 136.987120] hub 3-0:1.0: hub_suspend > [ 136.987130] usb usb3: bus suspend > [ 136.987135] ehci_hcd 0000:00:13.2: suspend root hub > [ 136.987141] ehci_hcd 0000:00:13.2: suspend failed because port 4 is resuming Earlier on the log states that device 3-4 is a "USB2.0 Camera"; presumably you know what it really is. Evidently that device is telling the computer it wants to wake up again as soon as the computer puts it to sleep. If you know that this is bogus, you can prevent the camera from sending wakeup requests as follows: echo disabled >/sys/bus/usb/devices/3-4/power/wakeup 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
