From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 16F9E220F3E for ; Wed, 6 Aug 2025 08:11:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754467898; cv=none; b=DbrPSa5vothpK4Sfyg/rLhWzib3GpiEMHIcv+h3D4Qi+f/fjQ2FMNQnZGlhjgy1sm7fSa4LgvRfJpeoDSu3h7tLIi44yvKaMtcuOmto1euFsrkvzQuqQFlgm2mkuupIyFFCy0/gGGrDSmxt2K8NRohgvdADaXWwe5YLhgY8LbnU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754467898; c=relaxed/simple; bh=RFXtDHvnXWHB+UETe09VoHNGOPD57YqAq0i9EIWMYbU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Ze2PK7BbQDoesAAc8zm+4IUzhv9Lu1Bhchc5MVV6lTmpyyFYqJAhpR4oZcyZ3vNR99LaYPoR79ZsQZz/TmysM9xbUMV5wDqNy53Iukve2UdxOeFHyh9rG2PFwwCpG5XoALEim4bORpPVR9wN7nkrCSqshhbvNLSbya0S+zGMM+Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2QrsJMr5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="2QrsJMr5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 21151C4CEF6; Wed, 6 Aug 2025 08:11:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1754467895; bh=RFXtDHvnXWHB+UETe09VoHNGOPD57YqAq0i9EIWMYbU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=2QrsJMr5vqAkF9K8uLPFv9lwHY2p3O+FJgGIYrcBMeLA+EyZg/eEzra1u1YIVeau4 Xf/PAPxb4P+3ip3HctVLOFOkj01ZHJkKgTagCwXDqcGuwJdIXbfN9xY+Gaj8KNdvvB j1ELp6Zb7FPZOusCKUirpY0UiBMM7r4fV6uAZAl4= Date: Wed, 6 Aug 2025 09:11:27 +0100 From: Greg KH To: Ulrich Stoehlker Cc: linux-usb@vger.kernel.org Subject: Re: pl2303 converter - unknown device type Message-ID: <2025080629-stapling-equinox-9cc4@gregkh> References: <585146173.2802367.1754377623142.ref@mail.yahoo.com> <585146173.2802367.1754377623142@mail.yahoo.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <585146173.2802367.1754377623142@mail.yahoo.com> On Tue, Aug 05, 2025 at 07:07:03AM +0000, Ulrich Stoehlker wrote: > Dear all, > > 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 6.8.0 is over a year old. Can you try a more modern kernel release? > 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!? Can you provide the output of 'lsusb -v' with this device plugged in? But again, please try a newer kernel version, 6.8.0 is very very old and obsolete and not supported at all by the kernel community. thanks, greg k-h