View Full Version : IBM T40 laptop when I plug a USB device, its runs at a reduced speed

18-04-2005, 02:35 AM
My IBM T40 Laptop, when I plug a USB v2 device (Maxtor OneTouch) into a port, report that the device could only run at a reduced speed. But previously, this device runs fine at high speed (v2). Now, its run at a v1.1 speed.
I try to re-install the host controller drivers, but it doesn't work.
My computer is XP SP2, T40 laptop, with latest BIO drivers, Intel 82801DB/DBM USB 2.0 enhanced host controller. The USB device, plug into either of the laptop's 2 ports could run at high-speed. Other devices, mouse eg run fine.

18-04-2005, 02:46 AM
Try looking for hidden (http://techrepublic.com.com/5100-6270_11-5202233.html#) devices in the device manager and removing ones relevant to your external drive.

18-04-2005, 02:52 AM
I thought I wait until the morning for people to reply, thanks!
(sleepy now, will look over in the morning)

18-04-2005, 09:34 AM
Have you re-installed windows since the usb devices last ran at Usb2 speed?
if so, you may need the usb2 patch for windows xp.

Speedy Gonzales
18-04-2005, 09:42 AM
SP2 should install files for USB2.

Only thing I can think of is USB2 (is it on the right option in the BIOS)???

Whats it on Fullspeed or Highspeed.

Altho, if u have reformatted this laptop recently, it may need the ide inf files, for USB 2 to work properly.

18-04-2005, 06:52 PM
Hi guys,

Sorry for the late reply. But I haven't re-installed windows since the USB device last ran and to answer 'Speedy Gonzales' question, the BIOS doesn't list what option USB should run.