Hello, i own a USB docking station which also contains a serial connector.
The host will do USB 2.0 (kernel module ehci-hcd) and detects the PL2303 serial port properly. It loads the appropiate kernel module, but at the end it fails somehow with the following message: ---------------- cut -------------------- pl2303 ttyUSB0: pl2303_open - failed submitting interrupt urb, error -28 ---------------- cut -------------------- As result the device /dev/ttyUSB0 is allocated by udev, but not working. After some tests i got a work around. I have to unload the kernel module ehci-hcd. Due uhci-hcd remains loaded the device works in USB 1.1 mode. Here the serial port works properly. Is there a fix the keep me from unloading the kernel module every time i want to use the serial port ? For example by directing the system to always bind the serial port to uhci-hcd (USB 1.1). Or better by a fix for ehci-hcd/pl2303 kernel. My system is Gentoo 2007.0, i386 and x86_64. lsusb tells (limited to the docking station): ---------------- cut -------------------- Bus 005 Device 009: ID 067b:0000 Prolific Technology, Inc. PL2301 USB-USB Bridge Bus 005 Device 006: ID 067b:2305 Prolific Technology, Inc. PL2305 Parallel Port Bus 005 Device 008: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Bus 005 Device 007: ID 0d3d:0001 Tangtop Technology Co., Ltd Bus 005 Device 005: ID 05e3:0604 Genesys Logic, Inc. USB 1.1 Hub Bus 005 Device 004: ID 1631:6200 Bus 005 Device 003: ID 0409:0058 NEC Corp. HighSpeed Hub ---------------- cut -------------------- regards Petric -- [EMAIL PROTECTED] mailing list
