USB host to host connection ??

[Kyrre Ness Sjobak]

man, 28.03.2005 kl. 17.22 skrev Bob Gustafson:
> I have a Compaq USB 2.0 Link adapter which has a wart in the middle of the
> cable containing a Prolific Technology Inc. 2501 chip and unknown
> microprocessor and memory, etc.
> 
> It is to connect a Gateway Solo 2150 laptop (new disk with Fedora 3 -
> pretty well updated using CDROMs and updates burned to CDROM) with desktop
> Fedora3smp.
> 
> Most everything else works nicely (tested on the desktop) - watching the
> /var/log/messages, I can plug in a Keyspan USB serial, Macintosh USB
> keyboard, Yahoo mini optical mouse, Flash USB drive - marvelous actions and
> everything cites works as expected. Keyboard takes over as console
> keyboard, Flash drive icon appears on desktop - marvelous.
> 
> However, the host to host only puts one line in the log file:
> 
> Mar 26 12:07:04 hoho2 kernel: usb 1-4: USB disconnect, address 3
> Mar 26 12:07:10 hoho2 kernel: usb 1-4: new high speed USB device using
> ehci_hcd and address 4
> 
> (Actually two lines - one when I pulled it out, the 2nd when I pushed it in).
> 
> The other end of the cable is plugged into the Gateway (to get power..)
> although it does not seem to make it more intelligent at this stage.
> 
> I updated hotplug and udev (to 50) and set DEBUG=true on udev. (on desktop)
> 
> Reading through the man pages and documentation on hotplug and udev, it is
> not so clear as to whether hotplug is even working on my system (no
> hotplugd daemon), or whether it should. Lots of documentation, but then
> words later saying, Oh, if you have a 2.6 system .. something else happens.
> 
> It would be nice to have a doc that tells where an event comes into the
> system at the begining, and then it is passed off to xyz, which then passes
> if off to abc.. Sort of the ankle bone connected to the leg bone, connected
> to the knee bone song.
> 
> The Compaq gadget came with a mini-CD, but it is for Windows only. Maybe
> there is something essential here?
> 
> Hoping for a clue
> 
> Bob Gustafson
> 
> [root at hoho2 ~]# cd /sys/bus/usb
> [root at hoho2 usb]# ls
> devices  drivers
> [root at hoho2 usb]# cd devices
> [root at hoho2 devices]# ls
> 1-0:1.0  1-4  1-4:1.0  2-0:1.0  3-0:1.0  4-0:1.0  usb1  usb2  usb3  usb4
> [root at hoho2 devices]# cd 1-4
> [root at hoho2 1-4]# ls
> 1-4:1.0              bDeviceSubClass     configuration  idVendor      serial
> bcdDevice            bmAttributes        detach_state   manufacturer  speed
> bConfigurationValue  bMaxPower           devnum         maxchild      version
> bDeviceClass         bNumConfigurations  driver         power
> bDeviceProtocol      bNumInterfaces      idProduct      product
> [root at hoho2 1-4]# cat idProduct
> 2501
> [root at hoho2 1-4]# cat manufacturer
> Prolific Technology Inc.
> [root at hoho2 1-4]#
> 
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I know it's not exactly what you are asking for - but using a twisted
ethernet cable and two ethernet cards are probably a *lot* easyer...