On Thursday May 14, Ethan wrote:
> I'm having trouble with a 7-port, powered USB hub made by D-Link
> (model DUB-7). The devices plugged into the hub seem to work fine for
> small transfers, but large transfers (such as to/from a scanner or
> usb-storage device) break something. Once things are "broken" I see
> from the syslog that the bus is reset every few seconds. It is not
> clear to me if any data moves at all between bus resets but it is very
> little if anything. When the bus is in this state, all devices on the
> bus become inaccessible not just the one that was engaged in the
> transfer. Removing and reinstalling the ehci_hcd and ohci_hcd modules
> seems to reset the bus and correct the problem until the next large
> transfer is initiated.
>
> I suspect the problem lies with the hub because all of the devices
> work fine when plugged directly into the computer or when plugged into
> a different brand hub.
I also have a DUB-7 that I use on RISC OS. I noticed a long time ago
that most mass storage devices won't work through it, though they
work fine when connected directly to the computer. I would be
interested in any insight that this thread might give me.
Dave
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