Re: how to debug USB firmware loading?

[michael <linux@networkingnewsletter.org.uk>]

On Fri, 2005-12-02 at 15:58 +0000, Michael Perry wrote:
> michael wrote:
> 
> > would some kind soul point me to documentation on how to debug
> > firmware that should be loaded when hotplug detects a new USB device?
> > this is for 2.6.11 kernel. thanks,
> 
> If I have a usb storage device, the routine operation for me is to
> insert the usb drive and then be tailing /var/log/messages
> interactively to watch for a drive assignment.  At the same time, I
> often take a peek at /proc/scsi/scsi and there should be a device
> assignment and type there.  If I have something like my Treo 600, often
> I just take a look at /var/log/messages or dmesg looking for a ttyUSB1
> to come up.
> 
> Often with storage devices I have to re-insert the usb device more than
> once since it seems that the usb-storage module gets wonky at times and
> will not actually create the device although it appears to load in the
> running kernel.  You could also check to make sure that usb-storage is
> loaded.  There is also this little command line utility called lsusb
> which works very nicely and will list all the usb devices it finds.
> 
> All my systems are self-compiled kernels running either 2.6.12 or later.

thanks. I'm looking more specifically for how to determine at what stage
firmware fails to load. Currently I just get
	<4> usb 2-1: no stage 1 firmware found!
even though it seems (to me) that I have said firmware and it's in the
correct directories

Thanks, Michael