Re: DWA-192 USB Wireless Network 5 GHz Interface Connection Speed Severely Degraded

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On Tue, 2017-11-07 at 19:53 +1100, Stephen Morris wrote:
> On 07/11/2017 10:51, stan wrote:
> > On Tue, 7 Nov 2017 08:25:32 +1100
> > Stephen Morris <samorris@xxxxxxxxxxxxxxx> wrote:
> > 
> > >       Having downloaded an updated version of the driver from Github
> > > that now compiles and runs with the 4.13 kernel I have looked at the
> > > wifi properties under Gnome and they tell me the connection speed is
> > > 450Mb/sec which is about the connection speed I get under Windows 10
> > > with the 2.4 GHz interface. Under Windows 10 the 5 GHz interface
> > > connects at the documented speed of 1.3 Mb/sec. If I use the 2.4 GHz
> > > interface for the device gnome tells me the connection speed is 252
> > > Mb/sec.
> > > 
> > >       Why are the connection speeds in Fedora so degraded?
> > 
> > I don't have an answer to your question, just a suggestion.  What speed
> > do you actually get when you test it?  If the real life speed rather
> > than the reported speed is different, then it is time to investigate
> > why.  If there is a real life discrepancy, then it could be that the
> > firmware in linux is reverse engineered versus the custom tuned
> > firmware for windows written by the manufacturer.
> > 
> > Not sure if this will work for you, but there should be one you can use
> > somewhere on the web.
> > 
> > https://fast.com/
> 
> I couldn't access the site above but I could use the speedtest.net link 
> it linked to, which gave me a result of 12ms ping, 125.62 Mbps download 
> and 35.51 Mbps upload, but I'm not sure how that relates to the connect 
> speed between my machine and my router? I'm also not sure how I can get 
> 125.62 Mbps download speed on a 100 Mbps cable connection.

You can't, which means these numbers should be taken with a pinch of
salt. Furthermore, I thought your concern was about your Wifi speed, in
which measuring your Internet speed with a Speedtest link isn't telling
you anything useful. You need to measure the actual transfer rate
between two hosts on your local network, e.g. by timing a large (multi-
gigabyte) file copy. If there is a significant difference between Linux
and Windows when doing this, then it's time to investigate further. If
possible, try both Windows-Windows and Linux-Linux, and make sure the
rest of the network is quiescent during the test.

poc
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