Re: 0bda:b812 USB "3.0" WLAN devices only report a maximum of 480 Mbps

[Fabian Melzow <fabian.melzow@gmail.com>]

Am Sun, 5 Nov 2023 13:20:38 +0100
schrieb Greg KH <gregkh@linuxfoundation.org>:

> On Sun, Nov 05, 2023 at 01:02:15PM +0100, Fabian Melzow wrote:
> > These devices should report 5 Gbps for USB 3.0 in the Binary Object
> > Store Descriptor, but don't do so.  
> 
> Why do you think these should report 5 Gbps?  If the device descriptor
> does not show it, there's nothing that we can do about it in the
> operating system, sorry.

Thanks. I don't look at the USB specification for USB >2.0, which
was long times ago and then only for a user space program and thought
that it at least theoretically could be possible to set the device
speed at some kind of initialization.

> > Maybe it is possible to add a software fix for this hardware
> > problem, so I report it here.  
> 
> What exactly is the hardware problem?  What is not working "properly"
> for them?

All 0bda:b812 USB-WLAN-devices seems to only operate at 480 Mbps,
but have a WLAN-chip which supports 780 Mbps at maximum.