On Fri, 29 Aug 2008, Frans Pop wrote: > Here's a snippet of what I got when I enabled USB debug recently: > [...] > Aug 6 22:06:23 faramir kernel: hub 2-0:1.0: hub_resume > Aug 6 22:06:23 faramir kernel: hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000 > Aug 6 22:06:23 faramir kernel: usb usb1: usb auto-resume > Aug 6 22:06:23 faramir kernel: usb usb1: wakeup_rh > Aug 6 22:06:23 faramir kernel: hub 1-0:1.0: hub_resume > Aug 6 22:06:23 faramir kernel: hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0000 > Aug 6 22:06:24 faramir kernel: usb usb2: suspend_rh (auto-stop) > Aug 6 22:06:24 faramir kernel: usb usb1: suspend_rh (auto-stop) > Aug 6 22:06:25 faramir kernel: hub 5-0:1.0: hub_suspend > Aug 6 22:06:25 faramir kernel: usb usb5: bus auto-suspend > Aug 6 22:06:25 faramir kernel: ehci_hcd 0000:00:1d.7: suspend root hub > Aug 6 22:06:25 faramir kernel: hub 2-0:1.0: hub_suspend > Aug 6 22:06:25 faramir kernel: usb usb2: bus auto-suspend > Aug 6 22:06:25 faramir kernel: usb usb2: suspend_rh > Aug 6 22:06:25 faramir kernel: hub 1-0:1.0: hub_suspend > Aug 6 22:06:25 faramir kernel: usb usb1: bus auto-suspend > Aug 6 22:06:25 faramir kernel: usb usb1: suspend_rh > Aug 6 22:06:28 faramir kernel: usb usb5: usb auto-resume > Aug 6 22:06:28 faramir kernel: ehci_hcd 0000:00:1d.7: resume root hub > Aug 6 22:06:28 faramir kernel: hub 5-0:1.0: hub_resume > Aug 6 22:06:28 faramir kernel: hub 5-0:1.0: state 7 ports 8 chg 0000 evt fe00 > Aug 6 22:06:28 faramir kernel: usb usb2: usb auto-resume > Aug 6 22:06:28 faramir kernel: usb usb2: wakeup_rh > Aug 6 22:06:28 faramir kernel: hub 2-0:1.0: hub_resume > Aug 6 22:06:28 faramir kernel: usb usb1: usb auto-resume > Aug 6 22:06:28 faramir kernel: usb usb1: wakeup_rh > Aug 6 22:06:28 faramir kernel: hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000 > Aug 6 22:06:28 faramir kernel: hub 1-0:1.0: hub_resume > Aug 6 22:06:28 faramir kernel: hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0000 > Aug 6 22:06:29 faramir kernel: usb usb2: suspend_rh (auto-stop) > Aug 6 22:06:29 faramir kernel: usb usb1: suspend_rh (auto-stop) > [...] > > AFAIK I have not enabled anything special in userland when it comes to > USB suspension; this is just a standard boot. Maybe you haven't enabled anything special, but something sure is running. It appears to be probing your USB devices every 5 seconds. You might be able to find out what it is by adding printk(KERN_INFO "usbdev open by %s\n", current->comm); to usbdev_open() in drivers/usb/core/devio.c. > I do have CONFIG_USB_SUSPEND enabled though, so maybe one should not do that > when using USB_DEBUG? Turning off CONFIG_USB_SUSPEND would get rid of most but not all of those messages above. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
