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Old 01-26-2006, 11:05 AM   #1
Registered: Jun 2004
Location: Tallinn
Distribution: Slackware/Crux/SuSE
Posts: 84

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USB-Hub 2x


I have a problem with USB Hubs. I don't know if it's linux or hardware related and would appreciate some help. The problem is following:

I have an HP nx9020 laptop and it has only 2 USB ports (which is definately not enough), so I got 2 USB Hubs. The problem is that I have a D-Link hub, which works all the time no matter what and an MSI hub, which works only when D-Link is not plugged in. I have a USB mouse and when D-Link is plugged in and I plug in the second Hub the mouse flashes for a second and then dies (it doesn't even light up). Both hubs on the other hand report that they are working (with an indicator). Did anyone face this problem?

Old 01-28-2006, 03:10 PM   #2
Registered: Aug 2005
Location: Anchorage, Alaska (soon EU, hopefully)
Distribution: Anything NOT SystemD (ie. M$) related.
Posts: 918

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usb only draws sooo much watts.. you maybe pushing it tooo far.

have you tried a differnt route... where your not taxing one usb system tooo much.

good luck.
Old 01-28-2006, 03:51 PM   #3
Registered: Jun 2004
Location: Tallinn
Distribution: Slackware/Crux/SuSE
Posts: 84

Original Poster
Rep: Reputation: 15
Thanks for your reply. I also think it could be the problem, however the hubs are self-powered, so they have their own power supply and don't take any power from the system itself.
I have windows on the same machine too and it also doesn't work with 2 hubs at the same time, but when I cascade the hubs I see that they draw 0 mA from the root hub, so I am really confused why is this happening.


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