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I see, when I connect a mouse in usb, within seconds my mouse starts woking, similarly for pendrive it is mounted. I just want to know as its the same USB port, How do Ubuntu understands what type of device has been connected? I am asking this question because I have a wimax modem, but ubuntu seems not to get that. If I know how automatically ubuntu gets that, I may be able to manually start the modem. and BTW, I just need to know how they are recognized?

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closed as unclear what you're asking by Thomas W., Jorge Castro, Eric Carvalho, hexafraction, bcbc Jul 8 '13 at 5:09

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.

You seem to be asking two questions here - would you like help fixing the issue with the USB modem, understanding how Ubuntu interfaces with USB devices, or both? Please edit your answer accordingly... thank you (: – Richard Jul 7 '13 at 3:05
up vote 0 down vote accepted

USB devices provide information describing what they are so the OS can automatically select an appropriate driver to communicate with the device. If your modem does not work, it is probably because there is no Linux driver for it.

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