USB Problem with reenabling hub

USB Problem with reenabling hub

[Udo A. Steinberg]

Hi all,

I have an USB hub built into my monitor (Eizo T761) which disconnects
and powers down the hub when the monitor gets switched off. After
switching it back on, a problem occurs with reenabling the ports on
that USB hub. The kernel output follows.

Comments anyone?

Regards,
Udo.


[Detect USB Ports on mainboard]

usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
PCI: Found IRQ 9 for device 00:04.2
PCI: The same IRQ used for device 00:04.3
PCI: The same IRQ used for device 00:09.0
PCI: The same IRQ used for device 00:09.1
PCI: The same IRQ used for device 00:0d.0
uhci.c: USB UHCI at I/O 0xd400, IRQ 9
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
PCI: Found IRQ 9 for device 00:04.3
PCI: The same IRQ used for device 00:04.2
PCI: The same IRQ used for device 00:09.0
PCI: The same IRQ used for device 00:09.1
PCI: The same IRQ used for device 00:0d.0
uhci.c: USB UHCI at I/O 0xd000, IRQ 9
usb.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found
hub.c: 2 ports detected

[Detect USB HUB in monitor]

hub.c: USB new device connect on bus1/1, assigned device number 2
hub.c: USB hub found
hub.c: 5 ports detected
hub.c: USB new device connect on bus1/1/1, assigned device number 3
usb.c: USB device 3 (vend/prod 0x56d/0x2) is not claimed by any active driver.
hub.c: USB new device connect on bus2/2, assigned device number 2
hub.c: USB hub found
hub.c: 4 ports detected

[switch monitor off]

usb.c: USB disconnect on device 2
usb.c: USB disconnect on device 3

[switch monitor back on]
hub.c: USB new device connect on bus1/1, assigned device number 4
usb.c: USB device not accepting new address=4 (error=-110)
hub.c: USB new device connect on bus1/1, assigned device number 5
usb.c: USB device not accepting new address=5 (error=-110)

Re: USB Problem with reenabling hub

[Pete Zaitcev]

> switching it back on, a problem occurs with reenabling the ports on
> that USB hub. The kernel output follows.

> Comments anyone?

Next time, post your /proc/version.

There were similar things recently (missing urb->dev
reinitialization in usb_hub_reset).

-- Pete

Re: USB Problem with reenabling hub

[Udo A. Steinberg]

Pete Zaitcev wrote:
> 
> > switching it back on, a problem occurs with reenabling the ports on
> > that USB hub. The kernel output follows.
> 
> > Comments anyone?
> 
> Next time, post your /proc/version.

I thought this was unnecessary in this case, because my mail headers
nicely reveal which version it is, but here it is anyways ;):

/proc/version
Linux version 2.4.4-ac6 (root@Corona) (gcc version 2.95.3 20010315 (release)) #1

> There were similar things recently (missing urb->dev
> reinitialization in usb_hub_reset).

If more info is required or someone has a patch to try, please let me know.

Regards,
Udo.