On Mon, 30 Jan 2012, Ross Ryles wrote: > On Mon, Jan 30, 2012 at 3:16 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > It could be a hardware problem in the OHCI host controller. �Ross, can > > you run a kernel with CONFIG_USB_DEBUG enabled? �Then when the hang > > occurs, go into /sys/kernel/debug/usb/ohci/0000:00:02.0 and post copies > > of the files in there. > > I've compiled 3.2.2-vanilla with CONFIG_USB_DEBUG=y and booted it. > However, I don't see anything under /sys/kernel/debug. What am I > missing? You may need to do "mount -t debugfs none /sys/kernel/debug". You also may need to enable CONFIG_DEBUG_FS -- most distributions turn it on by default, but if you're configuring your own kernel then it may be off. 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
