Yes thanks. The new kernel has not made it to the default raspberry pi repos yet so doing apt upgrade does not fix it. I did find a tool that does update the kernel in an "unsafe" way and that has fixed it for me. I know that raspberry pi OS and its versions and repositories are not your concern as you work on the kernel but as a linux simpleton these were the issues preventing me from getting the update! Thanks for your response. Giles Roadnight http://giles.roadnight.name On Mon, 20 Jun 2022 at 08:05, Johan Hovold <johan@xxxxxxxxxx> wrote: > > On Sat, Jun 18, 2022 at 07:42:43AM +0100, Giles Roadnight wrote: > > Hi > > > > I am trying to connect a Prolific pl2303 to my raspberry pi 4 running > > raspberry pi os 64 bit. When I look at dmesg I get the following > > output: > > > > [ 31.714397] cam-dummy-reg: disabling > > [ 44.046197] usb 1-1.1: USB disconnect, device number 3 > > [ 47.254348] usb 1-1.1: new full-speed USB device number 4 using xhci_hcd > > [ 47.361386] usb 1-1.1: New USB device found, idVendor=067b, > > idProduct=23a3, bcdDevice= 6.05 > > [ 47.361402] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > > [ 47.361407] usb 1-1.1: Product: USB-Serial Controller > > [ 47.361412] usb 1-1.1: Manufacturer: Prolific Technology Inc. > > [ 47.361417] usb 1-1.1: SerialNumber: ALBAb115819 > > [ 47.364081] pl2303 1-1.1:1.0: pl2303 converter detected > > [ 47.364106] pl2303 1-1.1:1.0: unknown device type, please report to > > linux-usb@xxxxxxxxxxxxxxx > > > > so I followed the example and emailed this address! > > > > and with lsusb: > > This has been fixed in mainline and backported to the relevant stable > trees (5.17.2, 5.16.19, 5.15.33) at the beginning of April. > > You didn't mention which kernel you use, but updating to a more recent > one should fix this. > > Johan
