Re: reset low speed USB device using uhci_hcd

[Gordon Messmer <yinyang@xxxxxxxxx>]

Alan Stern wrote:
> 
> Well, my advice still stands.  Try various intermediate kernels to narrow 
> down the range where the problem was introduced.
> 
> Also, you're better off using vanilla kernels from kernel.org (or mirrors)  
> rather than customized ones from Fedora, because we have a complete record
> of all the changes made in the course of their development.

I started with vanilla 2.6.17, and patched up to 2.6.19, using the 
"working" config from FC4.  I never saw the problem.

Then I built 2.6.19 with the config from FC6, and the problem came back.

After a whole bunch of compiles to work out which configuration 
difference causes the problem, it looks like the problem occurs when 
CONFIG_HZ=1000, but not when CONFIG_HZ=250.  I know that contradicts my 
last message.

I'm going to repeat the tests until I'm absolutely certain that this is 
the only change required to fix/trigger the problem, but I'm mostly 
certain that this is it.


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