Re: What causes "USB disconnect" ?

[Greg KH <greg@kroah.com>]

On Tue, Feb 07, 2006 at 12:12:58AM -0200, Fr?d?ric L. W. Meunier wrote:
> On 2/6/06, Fr?d?ric L. W. Meunier wrote:
> > When it happened, his lights turned off. I pressed a button, but
> > nothing happened. Then, I ignored it and it returned after the minutes
> > you see from the log.
> 
> It happened again. This, after an uptime of 3 days and a few hours.
> 
> Feb  6 23:59:00 pervalidus kernel: usb 1-2: USB disconnect, address 5
> Feb  6 23:59:39 pervalidus kernel: usb 1-2: new low speed USB device
> using uhci_hcd and address 6
> Feb  6 23:59:40 pervalidus kernel: usb 1-2: configuration #1 chosen
> from 1 choice
> Feb  6 23:59:44 pervalidus kernel: input: Logitech Inc. WingMan
> RumblePad as /class/input/input5
> Feb  6 23:59:44 pervalidus kernel: input: USB HID v1.10 Joystick
> [Logitech Inc. WingMan RumblePad] on usb-0000:00:10.0-2
> Feb  6 23:59:44 pervalidus kernel: usb 1-2: USB disconnect, address 6
> Feb  6 23:59:47 pervalidus kernel: usb 1-2: new low speed USB device
> using uhci_hcd and address 7
> Feb  6 23:59:47 pervalidus kernel: usb 1-2: configuration #1 chosen
> from 1 choice
> Feb  6 23:59:57 pervalidus kernel:
> /usr/local/src/kernel/linux-2.6.16/drivers/usb/input/hid-core.c:
> timeout initializing reports
> Feb  6 23:59:57 pervalidus kernel: input: Logitech Inc. WingMan
> RumblePad as /class/input/input6
> Feb  6 23:59:57 pervalidus kernel: input: USB HID v1.10 Joystick
> [Logitech Inc. WingMan RumblePad] on usb-0000:00:10.0-2
> 
> I changed it to other 2 ports and only see a
> 
> Feb  7 00:09:10 pervalidus kernel: usb 1-2: USB disconnect, address 7
> 
> Any way to know if this is the device's fault ?

I've never seen it to be anything but the device's fault, as it's pretty
much impossible for the kernel to disconnect a device like this from the
bus without specifically sending a command to do so (and that didn't
happen here.)

So I'd blame your device :)

thanks,

greg k-h