I just picked up a new usb-rs232 adapter and was met by the following on
a modern kernel:
# uname -r
5.16.0-rc2
usb 3-7: new full-speed USB device number 5 using xhci_hcd
usb 3-7: New USB device found, idVendor=067b, idProduct=23a3, bcdDevice= 1.05
usb 3-7: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 3-7: Product: ATEN USB to Serial Bridge
usb 3-7: Manufacturer: Prolific Technology Inc.
pl2303 3-7:1.0: pl2303 converter detected
pl2303 3-7:1.0: unknown device type, please report to linux-usb@xxxxxxxxxxxxxxx
# lsusb -vv -d 067b:23a3
Bus 003 Device 005: ID 067b:23a3 Prolific Technology, Inc. ATEN USB to Serial Bridge
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x067b Prolific Technology, Inc.
idProduct 0x23a3
bcdDevice 1.05
iManufacturer 1 Prolific Technology Inc.
iProduct 2 ATEN USB to Serial Bridge
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0027
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xbf
(Bus Powered)
Remote Wakeup
Battery Powered
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
Device Status: 0x0000
(Bus Powered)
But it worked on a bit older Debian Bullseye kernel:
# uname -r
5.10.0-8-amd64
usb 1-2: new full-speed USB device number 5 using xhci_hcd
usb 1-2: New USB device found, idVendor=067b, idProduct=23a3, bcdDevice= 1.05
usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-2: Product: ATEN USB to Serial Bridge
usb 1-2: Manufacturer: Prolific Technology Inc.
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial support registered for generic
usbcore: registered new interface driver pl2303
usbserial: USB Serial support registered for pl2303
pl2303 1-2:1.0: pl2303 converter detected
usb 1-2: pl2303 converter now attached to ttyUSB0
I'm guessing it just needs a case for this bcdDevice.
//Anton
