Thread: USB hub problem always disconnecting / connecting

I am having the same issues. I have a dlink 7port 5v hub. My hub will disconnect but won't reconnect unless i unplug and plug it back in. Not sure if this is a drivers problem or just a defective hub. If anyone knows, that would be great.

that has just happened to me last night.. i got out of the car.. opened the boot and re-connected it.. it worked for 5 mins then began the disconnecting / connecting crap!

ive tried a 4port hub, powered, unpowered, and now this NEC 7port

how annoying is it!

Did you solve it?

I have problems of a similar kind. I do not get connect/disconnect. I get "cannot start device" and "unknowndevice" depending on what hub I use. I have tried two identical ones, and a second type. None of the three gave me problem at home.

All are active, and I supply them with 5V from a separate DCL11 DC/DC converter.
[media]http://web.comhem.se/bengt-olof.swing/DVD_Power.jpg[/media]

I have tried to use them as passive hubs without connecting the power and without grounding any part but no change.

If I connect directly to my Commell LV-679D it works, even the USB DVD in the dash with a 5m USB wire. I run winXP.

Similar problem here but only since I relocated my computer from the back of my seat to the floor. Now when I play with the molex connector, I get the dinging noise and sometimes my screen will be a shade of pink or blue until I restart. I swapped my hard drive and touchscreen to their opposite molex connectors and it's only happened once since then......that was 2 weeks ago.

What connectors are you talking about, Maheriano? Power supply harness?

Problem I see is USB only.

I have a standard USB cable, I disconnect and insert the hub as a chain. Without hub it works, with hub inserted it doesn't. And I've tried 3 hubs and with or without external power to hub.

Very strange---

My USB hub problems were solved by

1. only using 4 port hubs (less power draw) and
2. on standby, cutting both external AND bus power using a relay to intercept the power signal in the USB cable.
3. having a single ground point for all power supplies (this takes some time to work out, but ground distribution blocks are very helpful)

Thanks

I think you are onto something with the power supply. I have 3 potential providers of 5V. The PC and the two DC/DC converters I have for the active hub's and the USB DVD drive that require 2A...

I guess that is the only thing I can try. Investigate my wireing.

Sorted the power. It turnes out that the problem relates to which USB port I use!

I use all comell 679D eight USB ports, and some work fine with all hubs, some work without hub and some does not work with hub but with some devices!

So nothing wrong with power, devices or hubs. And probalbly not driver. Its the mobo! (M2-ATX 160W power supply)

I have emailed support. I'll let you know.

Touchscreens arent meant to be connected to USB hubs. Buy a USB extension cable and connect from the USB root hub (from mobo).