From: Johan Hovold <johan@kernel.org>
To: Ulrich Stoehlker <ustoehlker@yahoo.de>
Cc: linux-usb@vger.kernel.org
Subject: Re: pl2303 converter - unknown device type
Date: Wed, 27 Aug 2025 10:25:36 +0200 [thread overview]
Message-ID: <aK7BAAo8xW-3fAaP@hovoldconsulting.com> (raw)
In-Reply-To: <585146173.2802367.1754377623142@mail.yahoo.com>
On Tue, Aug 05, 2025 at 07:07:03AM +0000, Ulrich Stoehlker wrote:
> I have a Multi-Channel-Analyzer (MCA) interfaced via usb.
> This device cannot be used on more recent kernels.
> I get the following error message:
>
> [663822.490455] usb 1-3: new high-speed USB device number 17 using xhci_hcd
> [663822.616495] usb 1-3: New USB device found, idVendor=0557, idProduct=2008, bcdDevice= 0.01
> [663822.616501] usb 1-3: New USB device strings: Mfr=0, Product=0, SerialNumber=0
> [663822.682309] usbcore: registered new interface driver usbserial_generic
> [663822.682326] usbserial: USB Serial support registered for generic
> [663822.686383] usbcore: registered new interface driver pl2303
> [663822.686402] usbserial: USB Serial support registered for pl2303
> [663822.686423] pl2303 1-3:1.0: pl2303 converter detected
> [663822.686431] pl2303 1-3:1.0: unknown device type, please report to linux-usb@vger.kernel.org
>
> Linux host1 6.8.0-64-generic #67~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Jun 24 15:19:46 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
>
> But it works with older kernels:
> Linux host2 5.10.103-v7+ #1529 SMP Tue Mar 8 12:21:37 GMT 2022 armv7l GNU/Linux
>
> Would it be possible to correct this problem!?
That should be doable.
Could you please post the output of "lsusb -v" for this device?
Johan
prev parent reply other threads:[~2025-08-27 8:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <585146173.2802367.1754377623142.ref@mail.yahoo.com>
2025-08-05 7:07 ` pl2303 converter - unknown device type Ulrich Stoehlker
2025-08-06 8:11 ` Greg KH
2025-08-27 8:25 ` Johan Hovold [this message]
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