Hello Alan, On 2013-08-23 21:33, Alan Stern wrote: >> Well, I replaced the motherboard by one of the same type and same BIOS >> version. >> And the problem is still here. >> >>> kernel:[ 3013.199945] Disabling IRQ #18 >> >> So what can we conclude? >> Kernel bug? >> Hardware bug? >> Something else? > > Any of the above. On the new hardware, is it still true that > /proc/interrupts shows IRQ 18 being used by ohci_hcd:usb1, 2, 3, and > nothing else? $ cat /proc/interrupts |grep 18: 104556 35248 IR-IO-APIC-fasteoi ohci_hcd:usb5, ohci_hcd:usb8, ohci_hcd:usb9 > Suppose you don't use the webcam, or better yet, unplug it (so that it > can't possibly be used without your knowledge). If you do, does the > IRQ still get disabled? If I simply stop the `motion` daemon I did not see the errors in the past. Replacing the pwc webcam did not help. > By the way, you aren't still running a 3.4 kernel are you? We move up with the releases so yes we have 3.10 kernels. > Assuming > you are using 3.10 or later, here's something else you can do. Turn on > CONFIG_DUMMY_IRQ in the kernel config. Then do > > rmmod ohci-pci > modprobe dummy-irq irq=18 > > and see if the IRQ line gets disabled after that. Can I actually use that irq/ports that way? (as with no usage the problem does not occur) Also: $ lsmod|grep pci ehci_pci 12432 0 ehci_hcd 56916 1 ehci_pci No ohci_pci, is that a problem? FWIW: on these boards (same type, BIOS, etc) I also see the issue described at http://marc.info/?l=linux-kernel&m=137749729105329&w=2. Any correlation? Kind regards, Udo -- 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
