On Tue, 23 Apr 2019, Jesse Hathaway wrote: > On Tue, Apr 16, 2019 at 10:00 AM Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > Whatever the source of the problem, I don't think you're going to find > > it by looking at the USB code. Perhaps the early initialization of the > > functions that _are_ present on the Comtrol card somehow messes up > > other parts of the system. > > Thanks for all you help Alan, > > I think at this point my Linux kernel debugging knowledge has run > aground. I would > love to crack this nut, but I doubt that will be possible with my > current knowledge base. > For now I am going to run the patched kernel even if I don't > understand precisely why > they prevent the box from hanging on boot when the Comtrol card is present. Okay, that's understandable. Sorry I couldn't do more to help. Alan Stern