Most recent kernel where this bug did not occur: Unknown
Using 2 serial adapters based on the pl2303 (HX, I beleive) chipset. First
device works fine, second is detected but non-functional (no TX/RX from a
modem). I've tried switching the order they are attached (both adapters do work).
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 003: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
Bus 001 Device 001: ID 0000:0000
drivers/usb/serial/usb-serial.c: USB Serial Driver core
drivers/usb/serial/usb-serial.c: USB Serial support registered for pl2303
pl2303 1-2:1.0: pl2303 converter detected
usb 1-2: pl2303 converter now attached to ttyUSB0
pl2303 2-1:1.0: pl2303 converter detected
usb 2-1: pl2303 converter now attached to ttyUSB1
usbcore: registered new driver pl2303
drivers/usb/serial/pl2303.c: Prolific PL2303 USB to serial adaptor driver
Steps to reproduce:
Attached two pl2303 devices, attempt to use second device.
Can you load the driver with "modprobe pl2303 debug=1" to see if we can get
some good debugging messages when you try to access the second device? I
tested this a long time ago, and it should work...
Just attach the kernel log output for when you do this please.
Please reopen this bug if:
- it is still present in kernel 2.6.17 and
- you can provide the requested data.