usb 1-1: new full-speed USB device number 4 using xhci_hcd usb 1-1: New USB device found, idVendor=0483, idProduct=5740 usb 1-1: Product: MStar GPS Receiver mstar_usb_serial_gps 1-1:1.0: MStar USB GPS converter detected usb 1-1: MStar USB GPS converter now attached to ttyUSB0
You plug in a “GlobalSat BU-353S4” (which uses MStar chipset) or a cheap “VK-172” GPS dongle. mstar-usb-serial-driver-gps
The Linux kernel developers continue to maintain mstar_usb_serial_gps as of kernel 6.x. In fact, recent patches (2023) improved runtime PM and added support for new chip variants. usb 1-1: new full-speed USB device number 4