Hi David,
should I copy the list, and you two when replying in the future?
David Brownell wrote:
> On Sunday 05 September 2004 3:32 pm, Robert Urban wrote:
> >
> > by the way: I forget to mention that the drive only works (with
> > kernel 2.6.5) on one of the three USB busses present.
>
> Just three? The EHCI controller reports there are three more
> busses in addition to EHCI ... you showed one UHCI, I'd expect
> there would be two more. (Each UHCI bus having two ports,
> and the EHCI one having six. I'm guessing this is an Intel
> controller; it doesn't look like VIA since the size of the periodic
> schedule is fixed at 1024 entries, it's not tunable.)
Well, it is indeed an intel controller: ICH4. The MB has two soldered
jacks, both of which appear to be on bus 4:
lsusb:
plugged into one of the two:
Bus 004 Device 004: ID 0d49:7000 Maxtor
plugged into other of the two:
Bus 004 Device 005: ID 0d49:7000 Maxtor
otherwise there are two more jumper-blocks of 9 pins on the MB.
Two USB jacks connect to each jumper-block. The MB docs claim:
Intel ICH4 chipset
- 6 USB 2.0/1.1 ports
this seems to correspond to what I have.
>
> > Coincidentally,
> > or not, the bus on which the drive works is the one whose jacks
> > are directly soldered to the MB, that is, the ones right next to
> > the serial, parallel, mouse, KB, ethernet, etc connectors at the
> > back. The other (2) USB busses are connected to jacks via cables
> > that plug in to the MB.
>
> Are you sure those are connected properly, rather than maybe
> being reversed? The motherboard connectors I've seen were easy
> to hook up backwards, or even just offset by a row of pins or two.
> And some of those cables didn't seem to handle high speed signals
> all that well, either.
>
> Since you're seeing catastrophic errors very early, a wiring
> problem like that could explain everything...
If they were reversed, I'm guessing low-speed devices (USB1.1) would not
work, yes? But low-speed devices *do* work on all 6 ports (depending on
what kernel is booted...). I'm pretty careful about connecting things.
I don't know if you're familiar with MSI products, and I don't know if all
their MBs are similar, but I've got 2 MBs of theirs, and they both came
with a so-called "D-Bracket" which simply has 4 LEDs which show HW status.
Also on the D-Bracket are two USB jacks connected to a 30-40cm cable which
plugs into a jumper-block on the MB. I would be very surprised if MSI
delivered bundled HW with their MB which was bad...
cheers,
Robert Urban
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