On Friday 21 January 2005 3:35 pm, Robert Urban wrote:
> 
> Hello David,
> 
> a *while* ago I complained about not achieving a high-speed (2.0)
> connection with an external USB 2.0 hard drive, and you asked for
> some info (see below).  I apologize for the very long delay. 
> I have finally managed to collect the info, and I'd be very
> grateful if you'd have a look.

At this point it'd be most useful if you just tried 2.6.11-rc1,
which seems to have resolved this problem for most folk.

- Dave


> I check the BIOS -- USB legacy support is disabled and always has been.
> 
> The "dmesg" output for a good (2.6.5) and a bad (2.6.9) can be found at
> the following webpage:
> 
> http://www.spielwiese.de/USB/
> 
> If something is missing, please let me know! I'll do my best to get
> the information for you.
> 
> cheers,
> 
> Robert Urban
> 
> David Brownell wrote on 17-SEP-2004:
> > On Sunday 05 September 2004 8:18 pm, Robert Urban wrote:
> > 
> > > > 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.
> > 
> > OK, so that's not it.  Have you disabled the USB legacy support in your
> > BIOS?  Some folks have had problems in that area; recent kernels may
> > have traded off one set of BIOS problems for another, with a patch
> > that went in sometime after 2.6.5.
> > 
> > Again, since this happens so early that strongly suggests it's more in
> > chip/board/driver/... setup than anything else.  Recently that seems to
> > translate best to "BIOS issues".
> > 
> > In general it'd also help to see the CONFIG_USB_DEBUG output for
> > that driver initialization, including the register dumps.  That'd come
> > from "dmesg" output, not /var/log/messages.  Needed for both
> > a "works" case (2.6.5) and a "fails" case (2.6.current?); what'd be
> > interesting is any differences.
> > 
> >  
> > > 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...
> > 
> > I seem to recall they shipped some early Athlon dual-CPU boards
> > with southbridge USB that was "known broken", but that's a different
> > issue.  They made up for it by bundling USB 2.0 cards from NEC,
> > and the problem went away for good with the MPX chipset.
> > 
> > - Dave
> > 
> > 
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> 
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