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Date: Sun, 5 Nov 2023 13:20:38 +0100
From: Greg KH <gregkh@linuxfoundation.org>
To: Fabian Melzow <fabian.melzow@gmail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: 0bda:b812 USB "3.0" WLAN devices only report a maximum of 480
 Mbps
Message-ID: <2023110540-unseemly-mobilize-9e82@gregkh>
References: <20231105130215.2b669c8b@ping>
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On Sun, Nov 05, 2023 at 01:02:15PM +0100, Fabian Melzow wrote:
> Hello,
> 
> I have three USB "3.0" WLAN sticks (https://i.imgur.com/zSg5s0d.jpg)
> which are all based on the Realtek RTW8822BU (<=780 Mbps with IEEE
> 802.11ac) and use the same vendor and product ID 0bda:b812 and have the
> exact same output of "lsusb -vd 0bda:b812".
> 
> 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.

> 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?

thanks,

greg k-h