On Sun, 9 May 2004, Fulko Hew wrote:

> 
> So far I haven't put in any tracing information, but I have been playing
> with the latest Knoppix release that provides kernel 2.6.5
> And the hotplug works with it.
> 
> So could it be a difference in initialization between kernel 2.6.5 and 2.6.6
> or could it be something I (and RedHat) have left out of my/their 
> default kernel
> config during the build process?

Most likely is a difference in the way I/O and IRQ signals are handled.  
At this point I think we've almost exhausted the possibilities at the
level of the USB controller drivers; the answer probably lies somewhere
else.

The one thing still worth checking is the initialization code in
uhci-hcd.c.  Can you find any significant differences (such as reordering
the statements) between the 2.6.5 and 2.6.6 versions of the uhci_reset()  
routine?

Alan Stern



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