Messages in this thread | | | Date | Fri, 5 Mar 2004 16:13:31 -0500 (EST) | From | Alan Stern <> | Subject | Re: [linux-usb-devel] Re: [2.6.x] USB Zip drive kills ps2 mouse. |
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On Fri, 5 Mar 2004, Jamie Lokier wrote:
> > I've narrowed it down to the uhci_hcd module -- all the rest can > > be compiled in or as modules, doesn't matter. > > > > Just in case I was vague: the Zip drive works great regardless -- > > it's only the ps2 mouse which is affected by this weird problem. > > No cursor movement at all if the Zip is plugged in during boot. > > I don't know if it's related, but whenever I load the uhci_hcd module > on my laptop, or whenever I plug in a USB device while that module is > loaded (sorry, I forget which and can't test it now) - the floppy disk > motor and light are turned on for a couple of seconds! > > Now, why would a USB event trigger the floppy disk motor? It doesn't > happen with 2.4, and it doesn't happen on my desktop machine which is > OHCI+EHCI. > > Perhaps the uhci_hcd driver is trampling on some ISA I/O port that it > shouldn't be, which is causing both my floppy motor oddity and your > mouse problem? > > -- Jamie
No, the uhci-hcd driver isn't stepping on any extraneous ISA I/O ports.
Walt's problem was the result of a buggy BIOS, and turning off legacy USB support in the BIOS fixed it. Maybe your problem is similar, though it's hard to imagine how.
I've got 3 computers with UHCI controllers. On none of them does a USB event cause the floppy disk drive to do anything.
Alan Stern
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