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@xxxxxxxxxxxxxxx > > 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
