Public bug reported:
Running udevadm info with the device path of a virtual serial port
created by a USB device (in this case a Particle Photon development
board) returns the ID_MODEL_ID and ID_VENDOR_ID for the USB host
controller instead of the Particle device.
The consequence is mis-detection of the device associated with a virtual
serial port in applications.
udevadm info with the virtual serial port. Expect ID_MODEL_ID=c00a and
ID_VENDOR_ID=2b04
$ udevadm info --query=property -p
/devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/tty/ttyACM0
DEVLINKS=/dev/serial/by-id/pci-Particle_Electron_00000000050C-if00
/dev/serial/by-path/pci-0000:00:14.0-usb-0:1:1.0
DEVNAME=/dev/ttyACM0
DEVPATH=/devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/tty/ttyACM0
ID_BUS=pci
ID_MODEL=Electron
ID_MODEL_ENC=Electron
ID_MODEL_FROM_DATABASE=7 Series/C210 Series Chipset Family USB xHCI Host
Controller (Zenbook Prime UX31A)
ID_MODEL_ID=0x1e31
ID_PATH=pci-0000:00:14.0-usb-0:1:1.0
ID_PATH_TAG=pci-0000_00_14_0-usb-0_1_1_0
ID_PCI_CLASS_FROM_DATABASE=Serial bus controller
ID_PCI_INTERFACE_FROM_DATABASE=XHCI
ID_PCI_SUBCLASS_FROM_DATABASE=USB controller
ID_REVISION=0200
ID_SERIAL=Particle_Electron_00000000050C
ID_SERIAL_SHORT=00000000050C
ID_TYPE=generic
ID_USB_CLASS_FROM_DATABASE=Communications
ID_USB_DRIVER=cdc_acm
ID_USB_INTERFACES=:020201:0a0000:
ID_USB_INTERFACE_NUM=00
ID_VENDOR=Particle
ID_VENDOR_ENC=Particle
ID_VENDOR_FROM_DATABASE=Intel Corporation
ID_VENDOR_ID=0x8086
MAJOR=166
MINOR=0
SUBSYSTEM=tty
TAGS=:systemd:
USEC_INITIALIZED=4586285779
Running udevadm info with the base device path gives expected IDs
$ udevadm info --query=property -p /devices/pci0000:00/0000:00:14.0/usb1/1-1
BUSNUM=001
DEVNAME=/dev/bus/usb/001/008
DEVNUM=008
DEVPATH=/devices/pci0000:00/0000:00:14.0/usb1/1-1
DEVTYPE=usb_device
DRIVER=usb
ID_BUS=usb
ID_MODEL=Electron
ID_MODEL_ENC=Electron
ID_MODEL_ID=c00a
ID_REVISION=0200
ID_SERIAL=Particle_Electron_00000000050C
ID_SERIAL_SHORT=00000000050C
ID_USB_INTERFACES=:020201:0a0000:
ID_VENDOR=Particle
ID_VENDOR_ENC=Particle
ID_VENDOR_ID=2b04
MAJOR=189
MINOR=7
PRODUCT=2b04/c00a/200
SUBSYSTEM=usb
TYPE=2/0/0
USEC_INITIALIZED=4585731209
Running lsusb gives the expected IDs.
$ lsusb -v
Bus 001 Device 008: ID 2b04:c00a
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 2 Communications
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x2b04
idProduct 0xc00a
bcdDevice 2.00
iManufacturer 1 Particle
iProduct 2 Electron
iSerial 3 00000000050C
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 0
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 1
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 0
bSlaveInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 255
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 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
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
Device Status: 0x0001
Self Powered
$ lsb_release -rd
Description: Ubuntu 15.10
Release: 15.10
$ apt-cache policy udev
udev:
Installed: 225-1ubuntu9
Candidate: 225-1ubuntu9
Version table:
*** 225-1ubuntu9 0
500 http://archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
100 /var/lib/dpkg/status
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: udev 225-1ubuntu9
ProcVersionSignature: Ubuntu 4.2.0-25.30-generic 4.2.6
Uname: Linux 4.2.0-25-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: Unity
CustomUdevRuleFiles: 50-particle.rules 10-pololu-programmer.rules
49-teensy.rules 99-openocd.rules 96-monitor-hotplug.rules 51-android.rules
Date: Thu Jan 28 15:33:38 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-05-09 (994 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: ASUSTeK COMPUTER INC. UX31A
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-25-generic
root=UUID=99e110b2-cdee-4df1-ab50-25fea2fd4f30 ro splash quiet vt.handoff=7
SourcePackage: systemd
UpgradeStatus: Upgraded to wily on 2015-10-27 (93 days ago)
dmi.bios.date: 01/31/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX31A.218
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX31A
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrUX31A.218:bd01/31/2013:svnASUSTeKCOMPUTERINC.:pnUX31A:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX31A:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: UX31A
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug wily
** Summary changed:
- udevadm info reports wrong ID_MODEL_ID and for USB serial port
+ udevadm info reports wrong ID_MODEL_ID and ID_VENDOR_ID for USB serial port
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https://bugs.launchpad.net/bugs/1539348
Title:
udevadm info reports wrong ID_MODEL_ID and ID_VENDOR_ID for USB serial
port
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