USB 2.0

mrhaun03

I'm trying to connect a USB 2.0 device to a laptop which says it's compatible with USB 2.0. However, when I plug in the device it says that it can be faster if I switch it to a USB 2.0 port, click here for a list of available ports. I click and it says there are 6 available...there's only 2 USB ports. What's up with that?? Anyone have any ideas?

TechJunky

Do you have an HP laptop?

I had this problem with my work laptop about 2 months ago...

What a pain in the you know what to get it working again.

i had to delete registry keys, remove usb hub from device manager, remove system files using linux and then reinstall the usb manually and editing the keys within the registry..

Hopefully its just an easy fix and you aren't on SP2? I believe that has the usb 2.0 driver updates with the Service Pack.

mrhaun03

From what you say, I"d rather shoot myself. It's actually for a client, but I can make up some reason of why it doesn't work. Do you have a link explaining what you did, or was that just all things you thought to do? We don't use Linux at work, so if it's that time consuming, fagetaboutit(forget about it).

Plantwiz

mrhaun03 wrote:

From what you say, I"d rather shoot myself. It's actually for a client, but I can make up some reason of why it doesn't work. Do you have a link explaining what you did, or was that just all things you thought to do? We don't use Linux at work, so if it's that time consuming, fagetaboutit(forget about it).

Good grief

For the sake of those of us who make a living servicing client PCs....get out of the business. If you honestly would rather make up a 'reason' and lie to your client...give them their box back, don't charge them and suggest they find someone else. Don't lie to them!!!




BTW - there is no shame is admitting (to the client) something is out of your area of expertise.

mrhaun03

I wouldn't really make up some bullsh*t reason, but it is frustrating. I told him that I'm looking into it and will let know what I come up with.

kujayhawk93

If you haven't done so already, I suggest you start by going into Device Manager and deleting everything under Universal Serial Bus Controllers, then do a Scan for Hardware Changes so that XP will reinstall everything. Also, verify that it's on SP2, as the first responder mentioned.

mrhaun03

The laptop is running SP2. When I get a chance, I will update the drivers and post back with the results.

TechJunky

Disable power management of the USB hub.

Note If you perform the following procedure, you may also reduce the battery life on a portable computer.

To disable power management on the USB hub, follow these steps: 1. Click Start, and then click Run.
2. Type devmgmt.msc in the Open box, and then click OK.
3. Expand the Universal Serial Bus controllers node, and then follow these steps for each USB Root Hub that is listed: a. Right-click the USB Root Hub, and then click Properties.
b. Click the Power Management tab.
c. Click to clear the Allow the computer to turn off this device to save power check box, and then click OK.


Run regedt32.exe and navigate to;

HKEY_LOCAL_Machine\SYSTEM\CurrentControlSet\Services\Usb

Create the Usb key if it doesn't already exist. Under this key, create a new DWORD value called DisableSelectiveSuspend and give it a value of 1. Then restart the PC.

If the above doesnt work, make sure that your motherboard drivers are up to date. Uplug the power and the battery from the laptop and hold down the power button to get rid of any residual power. Then insert the battery and power adapter back in the PC and see if that fixes the problem.

Good luck.

JDMurray

Go to the laptop vendor's download Web page and update the laptop's motherboard chipset drivers and BIOS. Also check the vendor's knowledge base for this specific problem.

Slowhand

mrhaun03 wrote:

I'm trying to connect a USB 2.0 device to a laptop which says it's compatible with USB 2.0. However, when I plug in the device it says that it can be faster if I switch it to a USB 2.0 port, click here for a list of available ports. I click and it says there are 6 available...there's only 2 USB ports. What's up with that?? Anyone have any ideas?

One thing to keep in mind is that, just because it says it's compatible with 2.0, doesn't mean it is 2.0. From the sounds of it, the port is probably USB 1.1, which is quite compatible with 2.0, but will run at the 12Mbps, as opposed to 480Mbps. The error message you're getting seems to confirm that it's the port that's running the 1.1 speed, not the device.

As for six ports being available, that I have no idea about. Either there are four more usb connectors on the board that simply don't have ports attached to them, or something along those lines.

JDMurray

Slowhand wrote:

As for six ports being available, that I have no idea about. Either there are four more usb connectors on the board that simply don't have ports attached to them, or something along those lines.

This is certainly the case with modern PC motherboards, which have six USB ports for the two USB connectors on the front of the case and the four USB connectors attached to the back of the motherboard. Laptops typically have 2, 4, or 6 external USB connectors, and the motherboard will always report that it has six USB ports, regardless if they are attached to USB connectors.

Slowhand

I learn something new every day. Thanks for the into, jdmurray, I didn't actually know that about laptop boards.

mrhaun03

Sorry it look so long to reply. I updated the USB drivers and it works like a charm. Thanks for the info fellas.