Public bug reported:
Plug in 2 USB serial, run "lsusb":
...
Bus 004 Device 002: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x
Composite Device
Bus 005 Device 002: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x
Composite Device
...
sudo lsusb -v -s :002:
Bus 004 Device 002: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x
Composite Device
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x10c4 Cygnal Integrated Products, Inc.
idProduct 0xea60 CP210x Composite Device
bcdDevice 1.00
iManufacturer 1 Silicon Labs
iProduct 2 CP2102 USB to UART Bridge Controller
iSerial 3 0044
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 2 CP2102 USB to UART Bridge Controller
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
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 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)
Bus 005 Device 002: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x
Composite Device
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x10c4 Cygnal Integrated Products, Inc.
idProduct 0xea60 CP210x Composite Device
bcdDevice 1.00
iManufacturer 1 Silicon Labs
iProduct 2 USB to UART Test version HW1.2
iSerial 3 0045
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 2 USB to UART Test version HW1.2
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
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 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)
BUT
~$ ls -l /dev/|grep -i usb|grep tty
crw-rw---- 1 root dialout 188, 0 2011-09-27 10:39 ttyUSB0
=================
Just ONE USB tty device was config.
If plug in/out few times, sometime there are not any USB tty device was config(
in fact 2 USB serial cable was connected to PC)
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: udev 173-0ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu1
Architecture: i386
CheckboxSubmission: bb3c63e4987943d4cafafd94eb0f35b5
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
CustomUdevRuleFiles: 85-ifupdown.rules 70-wayland.rules
Date: Tue Sep 27 10:48:28 2011
MachineType: LENOVO 77328QC
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcEnviron:
LANGUAGE=en
PATH=(custom, user)
LANG=zh_CN.utf8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-12-generic
root=UUID=0aa8ab34-8f88-481b-ab3d-b7b787a481ed ro
SourcePackage: udev
UpgradeStatus: Upgraded to oneiric on 2011-06-02 (116 days ago)
dmi.bios.date: 08/22/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 7LET51WW (1.21 )
dmi.board.name: 77328QC
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr7LET51WW(1.21):bd08/22/2007:svnLENOVO:pn77328QC:pvrThinkPadR61:rvnLENOVO:rn77328QC:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 77328QC
dmi.product.version: ThinkPad R61
dmi.sys.vendor: LENOVO
** Affects: udev (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 oneiric
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https://bugs.launchpad.net/bugs/860204
Title:
Can't auto config 2 USB serial port
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