Hi Alan, I've tried a clean kernel (without your patch), which shows the same problem. So it seems it's not caused by your patch. I also added some debug statements to see what is happening. It seems that the xacterrs value is never initalized for this particular qh, which voids my theory about rapidly decreasing xacterrs without any messages printed. I've made a log of just inserting the hub, using 2.6.31-rc4 with your patch and [1] applied. The resulting kernel output is at [2]. I had a look at the kernel sources, but I really don't know enough about USB and the ehci driver to follow the code paths (or rather, know how they should be). So I hope you can make a decent guess from this log. Gr. Matthijs [1]: http://www.stdout.nl/ehci-debug/ehci-debug.patch.txt [2]: http://www.stdout.nl/ehci-debug/hub-connect.txt
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