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Date:   Tue, 8 Feb 2022 11:15:30 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Eduard-Bogdan Budai <eduard.budai@rcs-rds.ro>
Cc:     linux-usb@vger.kernel.org
Subject: Re: Bug report for pl2303 converter (ATEN USB to serial Bridge,
 idVendor=067b, idProduct=23a3, bcdDevice= 1.05)
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On Thu, Jan 20, 2022 at 05:08:15PM +0200, Eduard-Bogdan Budai wrote:
> Dear Sirs,
> 
> Today, when a USB-RJ45 adapter was conected to a cumputer running Ubuntu
> 20.04.3 in its dmesg appeared:
> 
> [Thu Jan 20 15:24:17 2022] usb 1-3.1: new full-speed USB device number 7
> using xhci_hcd
> [Thu Jan 20 15:24:17 2022] usb 1-3.1: New USB device found, idVendor=067b,
> idProduct=23a3, bcdDevice= 1.05
> [Thu Jan 20 15:24:17 2022] usb 1-3.1: New USB device strings: Mfr=1,
> Product=2, SerialNumber=0
> [Thu Jan 20 15:24:17 2022] usb 1-3.1: Product: ATEN USB to Serial Bridge
> [Thu Jan 20 15:24:17 2022] usb 1-3.1: Manufacturer: Prolific Technology Inc.
> [Thu Jan 20 15:24:17 2022] pl2303 1-3.1:1.0: pl2303 converter detected
> [Thu Jan 20 15:24:17 2022] pl2303 1-3.1:1.0: unknown device type, please
> report to linux-usb@vger.kernel.org
> 
> The kernel version is 5.13.0-27-generic #29~20.04.1-Ubuntu.

Should be fixed in newer kernel versions, this is a quite old and
obsolete kernel version.  Can you try 5.16?

thanks,

greg k-h