[kwlug-disc] Strange poweron problem

[CrankyOldBugger]

keyboard and mouse

On Sun, 9 Oct 2016 at 13:17 B.S. <bs27975.2 at gmail.com> wrote:

> Remind us ... what are / were you trying to run off the hub?
>
> (Did you put a volt meter on it? What did it report?)
>
>
> On 10/09/2016 08:38 AM, CrankyOldBugger wrote:
> > I agree with you, William, about not powering all the ports at the same
> > time.  I suspect that's the issue with the 7-port hub that I'm trying to
> > replace here...
> >
> >
> > On Sun, 9 Oct 2016 at 02:18 B. S. <bs27975 at gmail.com> wrote:
> >
> >> On 10/09/2016 01:11 AM, William Park via kwlug-disc wrote:
> >>> On Thu, Sep 29, 2016 at 12:01:52PM -0400, Andrew Kohlsmith (mailing
> >> lists account) wrote:
> >>>>> On Sep 29, 2016, at 11:58 AM, CrankyOldBugger <
> >> crankyoldbugger at gmail.com> wrote:
> >>>>> I've bought a couple of Anker 4 port hubs to replace that 7 port
> >>>>> job.  I'm kind of sad that I'll be losing the power switches on each
> >>>>> port but if the hub is failing then there's not much else I can do.
> >>>>
> >>>> I really like the Orico USB2 and USB3 hubs I got from Canada
> >>>> Computers. Haven???t taken one apart yet but they look good, some have
> >>>> power switches for the ports, and have decent quality power supplies
> >>>> and (in the case of USB3) high-current charging ports.
> >>>
> >>> +1.
> >>>
> >>> I bought Orico USB2 10-port hub, because it came with power supply
> (36W)
> >>> sufficient to power all 10 ports all occupied (25W).  Other hubs cannot
> >>> power all their ports at the same time, which is scam really.
> >>
> >> Check me on this ...
> >>
> >> Such means USB length is essentially infinite? IIRC, USB max. is 30',
> >> unless (powered) signal repeated - such as by these, daisy chained,
> even?
> >>
> >> Still limited to the max. bandwidth when it finally enters the computer,
> >> but this issue diminishes with USB 3, especially as hubs going outwards
> >> are also USB 3. i.e. If really far away, first hub or more could be USB
> >> 2, as long as accumulation of such USB 2 hubs into the first USB 3 hub
> >> doesn't exceed USB 3 bandwidth.
> >>
> >> [This matters as I have zoneminder set up, with USB cameras - far
> >> cheaper / perhaps more effective, than IP cameras). USB length becomes
> >> an issue. {Even a 486 handled 5 such cameras at 320 pixels, greyscale.}
> >> Was fostering a feral cat at the time, and needed to see when he came
> >> out from under the sofa so he could be socialized. Limited camera field
> >> of view is annoying!]
> >>
> >> And by going in to different (non-shared) ports into the computer, one
> >> could presumably have a star of multiple chains of USB devices in all
> >> direction and far longer than the 30' USB spec. As long as there's a
> >> wall socket to power the hubs along the way. Unless I'm misunderstanding
> >> something?
> >>
> >>
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> >>
> >>
> >
> >
> >
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>
>
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