On 8/10/05, Gerd v. Egidy <[EMAIL PROTECTED]> wrote:
> this looks interesting, I could use it to save energy on unneeded equipment.
> Could you post the source or a url of the code you use to switch the ports on
> and off?
We are using a python wrapper around libusb from the BITPIM package by
Rog
On Wed, 10 Aug 2005, Vlado Handziski wrote:
> > In principle, we could add an interface to the hub driver allowing
> > userspace to ask that certain ports be left powered off (and also that
> > ports be powered back on). This could be done using sysfs or ioctl; it
> > doesn't fit all that well in
On 8/9/05, Alan Stern <[EMAIL PROTECTED]> wrote:
> Right now the kernel has very minimal support for hub port power changes.
> IIRC, the code for automatically turning port power back on was added in
> order to cope with peculiarities of various host controllers or with the
> USB OTG requirements.
Hi,
> our research group is involved in building a large sensor node testbed, and
> we need to control the power supply of a number of USB devices by turning
> on/off the supply of the ports on the hub they are connected to. The hubs
> that we are using are DUB-H4, a self-powered 4-port USB 2.0 hu
Hi all,
just to summarize, it really was a problem with the firmware of the hub.
Turning individual ports off works properly with the original revision which
is based on a NEC chip. All subsequent revisions of the D-Link DUBH4E use a
chip from Genesys Logic and have a HW issue that prevents ind
Hi all,
just to summarize, it really was a problem with the firmware of the hub.
Turning individual ports off works properly with the original revision which
is based on a NEC chip. All subsequent revisions of the D-Link DUBH4E use a
chip from Genesys Logic and have a HW issue that prevents ind
On Mon, 8 Aug 2005, Vlado Handziski wrote:
> I still have one remaining question. In my previous mail I said that it is
> very logical that the parent hub is reset and powered-up when a child hub is
> not reachable (because the partent's port to which the second hub is
> connected has been turn
On Sunday 07 August 2005 20:59, Alan Stern wrote:
> On Sun, 7 Aug 2005, Vlado Handziski wrote:
>
> > Hi Alan,
> >
> > Thanks for the pointers. Unfortunately, even with debugging on, I can not
> > detect any connect-change event. As you can see above, after sending the
> > command to turn-off th
On Sun, 7 Aug 2005, Vlado Handziski wrote:
> Hi Alan,
>
> Thanks for the pointers. Unfortunately, even with debugging on, I can not
> detect any connect-change event. As you can see above, after sending the
> command to turn-off the power of the port, the port status query does return
> "data
On Friday 05 August 2005 23:25, Alan Stern wrote:
> On Fri, 5 Aug 2005, Vlado Handziski wrote:
>
> > Hi all,
> >
> > our research group is involved in building a large sensor node testbed,
and we
> > need to control the power supply of a number of USB devices by turning
on/off
> > the supply
On Fri, 5 Aug 2005, Vlado Handziski wrote:
> Hi all,
>
> our research group is involved in building a large sensor node testbed, and
> we
> need to control the power supply of a number of USB devices by turning on/off
> the supply of the ports on the hub they are connected to. The hubs that we
Hi all,
our research group is involved in building a large sensor node testbed, and we
need to control the power supply of a number of USB devices by turning on/off
the supply of the ports on the hub they are connected to. The hubs that we
are using are DUB-H4, a self-powered 4-port USB 2.0 hub
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