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
Date: Sun, 5 Nov 2023 13:20:38 +0100 [thread overview]
Message-ID: <2023110540-unseemly-mobilize-9e82@gregkh> (raw)
In-Reply-To: <20231105130215.2b669c8b@ping>
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
next prev parent reply other threads:[~2023-11-05 12:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-05 12:02 0bda:b812 USB "3.0" WLAN devices only report a maximum of 480 Mbps Fabian Melzow
2023-11-05 12:20 ` Greg KH [this message]
2023-11-05 12:49 ` Fabian Melzow
2023-11-05 13:11 ` Greg KH
2023-11-05 13:30 ` Fabian Melzow
2023-11-05 14:56 ` Alan Stern
2023-11-05 15:33 ` Fabian Melzow
2023-11-05 19:16 ` Alan Stern
2023-11-05 20:24 ` Fabian Melzow
2023-11-06 2:10 ` Alan Stern
2023-11-06 7:03 ` Fabian Melzow
2023-11-06 15:44 ` Alan Stern
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2023110540-unseemly-mobilize-9e82@gregkh \
--to=gregkh@linuxfoundation.org \
--cc=fabian.melzow@gmail.com \
--cc=linux-usb@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox