On Wed, 22 Mar 2006, Thomas Thanner wrote:

> >>UHCI driver is compiled directly into kernel. EHCI driver is modular.
> >>
> >>When mouse is moved during boot, boot process stops when the UHCI driver 
> >>gets 
> >>initialized.

> We will test with a 2.6.15 kernel asap, a 2.6.16 has to be prepared for our 
> system first, so it will take some time before we can do the test.
> 
> We have new findings, too. Now it looks like the problem is based on 
> communication between EHCI and UHCI.
> 
> When both are modules, everything works fine.
> When both are compiled into kernel, everything works fine.
> When UHCI is compiled in and EHCI is module, we have the error.

But above you said that everything stops when the UHCI driver gets 
initialized.  If it is built into the kernel, then it will be initialized 
long before the EHCI driver module can be loaded.  So this cannot be a 
communications problem between the two drivers.

If you still have the problem in later kernels, you should turn in 
CONFIG_USB_DEBUG in the configuration and post the kernel log.

Alan Stern



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