On Friday, October 14, 2011 03:24:25 PM gene heskett did opine:
> On Friday, October 14, 2011 02:22:33 PM Alan Stern did opine:
[...]
> > If it will make life easier, you can use software to do the equivalent
> >
> > of the unplug/replug:
> > echo 0 >/sys/bus/usb/devices/1-2/bConfigurationValue
> >
> > is much like unplugging the cable from the computer. The same command
> > with 1 in place of 0 is like replugging.
I moved that cable to be plugged into a mobo port, reducing the hub in path
count by one, getting this in dmesg:
usb 1-2.1.4.1.1: input irq status -75 received
usb 1-2.1.4.1.1: input irq status -75 received
usb 1-2.1.4.1.1: input irq status -75 received
usb 1-2.1.4.1.1: input irq status -75 received
usb 1-2.1.4.1.1: input irq status -75 received
usb 1-2.1.4.1.1: input irq status -75 received
usb 1-2.1.4.1.1: input irq status -75 received
usb 1-10: USB disconnect, address 7
usb 1-10.4: USB disconnect, address 11
usb 1-2.1: USB disconnect, address 20
usb 1-2.1.4: USB disconnect, address 21
usb 1-2.1.4.1: USB disconnect, address 25
usb 1-2.1.4.1.1: USB disconnect, address 26
btusb_bulk_complete: hci0 urb c3861180 failed to resubmit (19)
btusb_bulk_complete: hci0 urb c3861980 failed to resubmit (19)
usb 1-2.1.4.1.2: USB disconnect, address 27
usb 1-2.1.4.1.3: USB disconnect, address 28
btusb_intr_complete: hci0 urb c3861e00 failed to resubmit (19)
btusb_send_frame: hci0 urb effa5100 submission failed
usb 1-2.1.4.4: USB disconnect, address 22
usb 1-2.1.4.4.3: USB disconnect, address 23
ftdi_sio ttyUSB2: FTDI USB Serial Device converter now disconnected from
ttyUSB2
ftdi_sio 1-2.1.4.4.3:1.0: device disconnected
usb 1-2.1.4.4.4: USB disconnect, address 24
usblp3: removed
usb 2-10: new full speed USB device using ohci_hcd and address 5
usb 2-10: New USB device found, idVendor=03eb, idProduct=3301
usb 2-10: New USB device strings: Mfr=0, Product=2, SerialNumber=0
usb 2-10: Product: Standard USB Hub
hub 2-10:1.0: USB hub found
hub 2-10:1.0: 4 ports detected
hub 2-10:1.0: config failed, can't get hub status (err -71)
usb 2-10: reset full speed USB device using ohci_hcd and address 5
usb 2-10: USB disconnect, address 5
usb 2-10: new full speed USB device using ohci_hcd and address 6
usb 2-10: New USB device found, idVendor=03eb, idProduct=3301
usb 2-10: New USB device strings: Mfr=0, Product=2, SerialNumber=0
usb 2-10: Product: Standard USB Hub
hub 2-10:1.0: USB hub found
hub 2-10:1.0: 4 ports detected
hub 2-10:1.0: config failed, can't get hub status (err -71)
usb 2-10: reset full speed USB device using ohci_hcd and address 6
usb 2-10: USB disconnect, address 6
usb 2-10: new full speed USB device using ohci_hcd and address 7
usb 2-10: New USB device found, idVendor=03eb, idProduct=3301
usb 2-10: New USB device strings: Mfr=0, Product=2, SerialNumber=0
usb 2-10: Product: Standard USB Hub
hub 2-10:1.0: USB hub found
hub 2-10:1.0: 4 ports detected
hub 2-10:1.0: config failed, can't get hub status (err -71)
Then I tried the echo trick:
[root@coyote host]# echo 0 >/sys/bus/usb/devices/2-10/bConfigurationValue
-bash: echo: write error: Protocol error
[root@coyote host]# echo 1 >/sys/bus/usb/devices/2-10/bConfigurationValue
-bash: echo: write error: Protocol error
????
Unplugging it, and replugging it is more difficult, but here goes:
I plugged it back into a more accessible breakout this time. still on the
motherboard:
usb 2-10: USB disconnect, address 10
usb 2-8: new full speed USB device using ohci_hcd and address 11
usb 2-8: New USB device found, idVendor=03eb, idProduct=3301
usb 2-8: New USB device strings: Mfr=0, Product=2, SerialNumber=0
usb 2-8: Product: Standard USB Hub
hub 2-8:1.0: USB hub found
hub 2-8:1.0: 4 ports detected
hub 2-8:1.0: config failed, can't get hub status (err -71)
Apparently these cables need a powered hub to even think about working. On
mobo power, no biscuit. So you are right, its a POS.
New ones will be here in 3 or 4 days, amazingly, 1/5th the price I paid for
these ($40 ea) about 4 years ago. As I have 2 of these, and the other is
not in use, I'll try it in the meantime. No biscuit, bad dog, put them
both on a powered hub and everything signs on about 20% of the time.
Thanks for your patience, it is appreciated.
Cheers, Gene
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Let us be charitable, and call it a misleading feature :-)
-- Larry Wall in <2609@xxxxxxxxxxxxxxxxx>
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