Re: USB device not detected on boot

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On Wed, 10 Mar 2010, Nuno Gonçalves wrote:

> root@OpenWrt:/# lsmod | grep usb
> usbserial              23856  0
> root@OpenWrt:/# lsmod | grep ar71xx
> root@OpenWrt:/#
> 
> Maybe it's builtin and not a module...?

Must be.

Here's something else you can do.  Make sure CONFIG_DEBUG_FS is also
enabled in the configuration.  Then mount a debugfs filesystem, say on
/sys/kernel/debug, and post a copy of the
/sys/kernel/debug/usb/ehci/ar71xx/registers file (the pathname may be
slightly different from this, but it will be similar).  Do this after a
failed detection, while the device is still plugged in.

Alan Stern

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