[ltp] T42: USB2 port way too slow

Tino Keitel linux-thinkpad@linux-thinkpad.org
Sat, 17 Jun 2006 17:08:23 +0200


On Sat, Jun 17, 2006 at 14:52:56 +0200, Eric Van Buggenhaut wrote:
> Hi,
> 
> My T42 ships with 2 hi-speed USB ports. They're managed boy ehci-hcd 
> kernel modules, the only ones loaded into memory.
> 
> Anyway, I get super slow data transfer rates and I can't understand 
> why:
> 
> It takes 14 min (!!) to transfer 57MB to a USB pendrive (which is also 
> hi-speed USB):

Are you sure? Could you look into /proc/bus/usb/devices? If you read
Spd=12 for your pendrive, it only works at slow USB1.1 speed. Spd=480
is the faster USB2 speed.

Regards,
Tino