ShawJohn

Hi Folks,
I have had my GPS running trouble free for three weeks, until I changed the cabling; I put a USB extension cable in with a non-powered 4port hub on the end, with my GPS, WiFi, and Bluetouth dongles on. All works fine for a short while, then the GPS loses lock, then the WiFi stops working, then the bluetooth, then seconds later the touchscreen stops working and a couple of minutes after the PC reboots and crashed on reboot...!

XP says that each USB port can support 500mA, and shows that 100mA's is used with all devices plugged in. Is it possible that I am overloading the USB Controller?

Why does my BU-303 work flawlessly in some USB ports and not others, also the comm port number changes if its USB socket location is changed, why, is there anyway to force it to always use the same port number.

In one port it will lock before the PC boots and will hold lock constantly, in others it takes an age to lock then loses it every couple of minutes!

How many devices is it safe to run per port?

Is the extention cable likely to be causing the problem as non of this occured before I plugged that in... The only other new part was the BT dongle?!?

I've done the usual and checket baud rate, comm port number etc...

I'm confused?!?? :-(


John

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sygad

Damn, post back with results cos that was the next bit of kit I was gonna buy for the same reason

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Mad Ad

USB gremlins eh? In my experience, although USB was *supposed* to be able to chain upto 127 devices, reliability is at its best with just one per port. Any more than that and trial and error is all you have when things dont play together. Some things will tolerate each other on the same bus, others wont and it doesnt seem to matter wether its brand name kit or far east junk.

Despite its backward compatibility, 2.0 and 1.1 devices can grumble when mixed together and really the only solution is to have at least as many ports on your mobo as you intend to have USB devices.

Its not a solution but this guy explains it a bit better than I can. http://www.dansdata.com/gz005.htm

GruvThang

I have found that my GPS is very picky about what hub it was installed on and which it runs on. They have to be the same, end of story. If I want to change the port I have to un-install it on the old port (with it plugged in works the best) and install it again on the new port (again, with it moved to the new port).

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