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I've just acquired a USB F5D8053ed Belkin adapter and it is unreasonably slow.

Details of how I installed the firmware and device driver are described in this AU Question.

I believe there is either a problem with a driver or adapter itself that is preventing from using the full network quality. At the moment I can see that my Windows laptop is performing at 30 x speed better than the Ubuntu desktop PC with Belkin.

What are they ways to troubleshoot pure wireless network performance on Ubuntu?

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last I heard Ubuntu had problems with wireless N not working properly yet, but I can't find that bug report where I saw the problem described. – Christopher Kyle Horton Jun 27 '11 at 2:19

It's likely that the antenna in the USB dongle is horizontally polarized while the antenna on your access point is likely vertically polarized. Try using a short USB cable so the dongle can be situated vertically. That may help. I've a TRENDnet USB dongle that came with a very sort USB cable for that purpose.

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On 10.10, Intel 5300 was limited from N to G only, due to kernel bugs. See:

I'd try to update the kernel in your position (see: ), or try to disable N mode somehow, but I think, for this one, updating the kernel would be easier.

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