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Too many USB devices

rudy

rudy

[H]F Junkie
Joined
Apr 4, 2004
Messages
8,703
Is it possible to just have too many USB devices?

I am having problems with seemingly random working of devices. And sometimes one will just quit when I put a new device in.

I have a self powered hub so I dont think it is a power issue. But I noticed a front USB card reader was not working and thought I did not plug it into the mobo, but I did.

Then I noticed my wireless mouse and keyboard would stop working i I plugged in an infrared sensor for a windows media center remote.

It seems I cannot keep all the things working.

Windows 7
i5 2500k on a micro atx motherboard from gigabyte
650 watt psu

Whats odd is I dont even have all the ports filled but I suppose I am close

self powered USB 3 hub near PS2 port connected to:
logitect unifying reciever
xbox 360 wireless controller receiver
2 xbox chargers

1 wired keyboard
1 wired mouse
infrared receiver from rosewill for windows media center, this thing often says there was some failure in connecting and it is the item that came into the system last so I have been messing with the most.
internal 3.5 inch card reader with 2 connections to the motherboard. Nothing was connected to this.
 
The USB spec says that you can have up to 127 devices connected to a single host controller, so it would seem that you are a long ways off from any USB limits. I would suspect the individual items first, especially since it seems you aren't using that powered hub for any of the devices that seem to be causing issues.

One other random shot in the dark is to check for a BIOS upgrade for your motherboard. I've seen a few that fixed some USB issues. I suspect that isn't the case here, however.
 
Not all USB hubs are created equal, have you tried switching out hubs?
 
No I dont have another hub, but I did pay a little more for this one to get USB 3.0 for future proofing. It is externally powered too.
 
rudy said:
No I dont have another hub, but I did pay a little more for this one to get USB 3.0 for future proofing. It is externally powered too.
Click to expand...

The power adapter might not be up to it. I wouldn't be surprised.
 
If the power adapter or lack of power was the problem then wouldn't moving any device off the hub fix the problem? As it is devices can stop working off the hub.
 
I had this issue when the USB controller ran out of bandwidth, but it was with far more intensive devices such as HD web cams. I could only plug two into the motherboard, and the other two had to plug into the front of the PC, otherwise all the other devices would stop working.

In the device manager, under USB controllers, you can see how much bandwidth is used. Don't know if that will help.
 
The front ports on my p182 don't work nearly as well as the ones attached to the motherboard itself on the back. My Android phone will charge, but if I want to debug I usually need to use a rear port for some reason.
 
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