Hi We have a Cashino PTP-lil/BT24 Slip printer[1]. When configured in serial mode, it uses a pl2303 chip. This has not detected by the kernel since 5.13. The bcdUSB is 1.01, and the driver was changed to only allow 1.10 and 2.00 [2] Please consider adding 1.01 as an allowed pl2303 bcdUSB. Thanks, Gary # uname -a Linux GAU233333LD12 5.17.6-051706-generic #202205090841 SMP PREEMPT Mon May 9 08:51:54 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux # journalctl -b -k -g pl2303 -o cat usbcore: registered new interface driver pl2303 usbserial: USB Serial support registered for pl2303 pl2303 3-3:1.0: pl2303 converter detected pl2303 3-3:1.0: unknown device type, please report to linux-usb@xxxxxxxxxxxxxxx Full output of lsusb -v: https://launchpadlibrarian.net/599900231/lsusb-v [1] https://www.cashinotech.com/ptp-iii-80mm-portable-mobile-thermal-printer_p23.html [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/usb/serial/pl2303.c#n421