[ltp] usb 2.0 operating as usb 1.1

[bruce zuo]

> Date: Sun, 19 Jun 2005 18:51:57 +0200
> From: Christian Hauser <c.hauser@active.ch>
> To: linux-thinkpad@linux-thinkpad.org
> Subject: Re: [ltp] usb 2.0 operating as usb 1.1
> Reply-To: linux-thinkpad@linux-thinkpad.org
>
> Matthias Himber wrote:
> > Short answer: your southbridge is about to die, get your system board
> > replaced. Hopefully its still under warranty.
> >
> > Long answer: a number of Intel chipsets for Pentium IV and Pentium M
> > processors have a design flaw that makes the southbridge (which contain=
s the
> > USB host controllers) especially sensitive to static electricity. As a =
result
> > there is a (small) risk that when plugging in or removing a USB device =
causes
> > damage to the chip. Usually, the first symptom is broken USB 2.0, behav=
ing in
> > exactly the way you described (ie, works under Windows, but only after =
some
> > waiting and as if it was connected to a USB 1.1 controller, not a USB 2=
.0
> > one, and not at all under Linux unless you unload the USB 2.0 driver). =
This
> > tends to lead to a completely dead chipset a short time later, so bette=
r get
> > it serviced NOW.
> > Incidentially, exactly this happened to me around last Christmas. Same
> > Thinkpad model, too.
>
> Thanks a lot Matthias, I have the same problem, but ignored it so far,
> because I hardly ever use USB devices. But not that I know I'll get this
> fixed before my warranty ends.
>
> Christian
>

Hey, all,

Is there somebody can tell me how to tell if my T41's USB device
working under 2.0 or 1.1? What I can notice is the speed to access my
USB hard drive is getting slow... :-(

Following is the messages:

Jun 29 23:51:29 localhost kernel: uhci_hcd 0000:00:1d.2: Intel Corp.
82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3
Jun 29 23:51:29 localhost kernel: uhci_hcd 0000:00:1d.2: irq 11, io base 0x=
1840
Jun 29 23:51:29 localhost kernel: uhci_hcd 0000:00:1d.2: new USB bus
registered, assigned bus number 3
Jun 29 23:51:29 localhost kernel: hub 3-0:1.0: USB hub found
Jun 29 23:51:29 localhost kernel: hub 3-0:1.0: 2 ports detected
Jun 29 23:51:29 localhost kernel: usb 2-1: new low speed USB device
using uhci_hcd and address 2
Jun 29 23:51:29 localhost kernel: usb 2-2: new full speed USB device
using uhci_hcd and address 3
Jun 29 23:51:29 localhost kernel: usbcore: registered new driver hiddev

Should I get my toy's mainboard replaced?

Thanks for advance.

--Bruce