[ltp] T40p, usb detection failed

[Andrey Kislyuk]

Do your USB sticks only work at USB 1.1 speeds under Windows XP?

This is a well-known problem on all early T40 series models. The problem 
is that the USB controller on the Intel chipset gets damaged and this 
manifests itself in the messages like those below, as well as USB 2 not 
working.

The solution is to send the machine to IBM for system board replacement, 
citing USB malfunctions. The replaced system board worked fine for me 
(well, it didn't the first time because the first replacement was 
faulty, but that's another story) and the USB problems disappeared.

Depending on the age of your machine, you may not have much time left in 
warranty, so don't hesitate and send it in - this is a hardware problem.

-ak


Mathias Wellner wrote:
> Hello,
> 
> @Ulrich: Thank you for the links.
> 
> The strange thing is that the memory stick works well under Win XP. It's 
> only under Linux (Ubuntu) that these strange phenomenons occur. So it 
> cannot be a hardware error in my opinion.
> 
> dmesg produces:
> usb 4-4: new high speed USB device using ehci_hcd and address 16
> usb 4-4: device descriptor read/64, error -71
> usb 4-4: new high speed USB device using ehci_hcd and address 24
> usb 4-4: new high speed USB device using ehci_hcd and address 36
> usb 4-4: new high speed USB device using ehci_hcd and address 38
> usb 4-4: new high speed USB device using ehci_hcd and address 91
> usb 4-4: new high speed USB device using ehci_hcd and address 100
> usb 4-4: new high speed USB device using ehci_hcd and address 125
> usb 4-4: device descriptor read/64, error -71
> 
> Regards, Mathias