USB camera not hotplugging because SYSFS{ID_VENDOR} etc. not available

[Moshe Yudkowsky <msha5_17@bl.com>]

In *both* the patched version of udev that I was running, and in the new 
official release of 0.089, I don't have SYSFS{ID_VENDOR} available when 
the device is plugged in. This in turn means that the libgphoto2.rules 
do not execute and the camera group is not set.

HOWEVER, the SYSFS variables for the MP3 player *are* available!

libgphoto2.rules:

> SYSFS{idVendor}="04a9", SYSFS{idProduct}="3051", MODE="0660", GROUP="camera"


udevmonitor --evn output for plugin of camera:

> UEVENT[1144681428.413283] add@/devices/pci0000:00/0000:00:10.0/usb1/1-1
> ACTION­d
> DEVPATH=/devices/pci0000:00/0000:00:10.0/usb1/1-1
> SUBSYSTEM=usb
> SEQNUM453
> PHYSDEVBUS=usb
> PHYSDEVDRIVER=usb
> 
> UDEV  [1144681428.414601] add@/devices/pci0000:00/0000:00:10.0/usb1/1-1
> UDEV_LOG=3
> ACTION­d
> DEVPATH=/devices/pci0000:00/0000:00:10.0/usb1/1-1
> SUBSYSTEM=usb
> SEQNUM453
> PHYSDEVBUS=usb
> PHYSDEVDRIVER=usb
> UDEVD_EVENT=1
> 
> UEVENT[1144681428.421787] add@/devices/pci0000:00/0000:00:10.0/usb1/1-1/1-1:1.0
> ACTION­d
> DEVPATH=/devices/pci0000:00/0000:00:10.0/usb1/1-1/1-1:1.0
> SUBSYSTEM=usb
> SEQNUM454
> PHYSDEVBUS=usb
> DEVICE=/proc/bus/usb/001/008
> PRODUCTJ9/3051/1
> TYPE%5/255/255
> INTERFACE%5/255/255
> MODALIAS=usb:v04A9p3051d0001dcFFdscFFdpFFicFFiscFFipFF
> 
> UEVENT[1144681428.430368] add@/class/usb_device/usbdev1.8
> ACTION­d
> DEVPATH=/class/usb_device/usbdev1.8
> SUBSYSTEM=usb_device
> SEQNUM455
> PHYSDEVPATH=/devices/pci0000:00/0000:00:10.0/usb1/1-1
> PHYSDEVBUS=usb
> PHYSDEVDRIVER=usb
> MAJOR\x189
> MINOR=7
> 
> UDEV  [1144681428.486187] add@/devices/pci0000:00/0000:00:10.0/usb1/1-1/1-1:1.0
> UDEV_LOG=3
> ACTION­d
> DEVPATH=/devices/pci0000:00/0000:00:10.0/usb1/1-1/1-1:1.0
> SUBSYSTEM=usb
> SEQNUM454
> PHYSDEVBUS=usb
> DEVICE=/proc/bus/usb/001/008
> PRODUCTJ9/3051/1
> TYPE%5/255/255
> INTERFACE%5/255/255
> MODALIAS=usb:v04A9p3051d0001dcFFdscFFdpFFicFFiscFFipFF
> UDEVD_EVENT=1
> 
> UDEV  [1144681428.584855] add@/class/usb_device/usbdev1.8
> UDEV_LOG=3
> ACTION­d
> DEVPATH=/class/usb_device/usbdev1.8
> SUBSYSTEM=usb_device
> SEQNUM455
> PHYSDEVPATH=/devices/pci0000:00/0000:00:10.0/usb1/1-1
> PHYSDEVBUS=usb
> PHYSDEVDRIVER=usb
> MAJOR\x189
> MINOR=7
> UDEVD_EVENT=1
> DEVNAME=/dev/bus/usb/001/008

And the device /dev/bus/usb/001/008 has group set to root, and that's 
the problem.

If I plug in the USB-based mp3 player, I get in part:

> UDEV  [1144681853.831681] add@/block/sdb
> UDEV_LOG=3
> ACTION­d
> DEVPATH=/block/sdb
> SUBSYSTEM=block
> SEQNUM464
> MINOR\x16
> MAJOR=8
> PHYSDEVPATH=/devices/pci0000:00/0000:00:10.3/usb4/4-4/4-4:1.0/host24/target24:0:0/24:0:0:0
> PHYSDEVBUS=scsi
> PHYSDEVDRIVER=sd
> UDEVD_EVENT=1
> ID_VENDOR=iriver
> ID_MODEL=MassStorage_Disc
> ID_REVISION\001
> ID_SERIAL=iriver_MassStorage_Disc
> ID_TYPE=disk
> ID_BUS=usb
> ID_PATH=pci-0000:00:10.3-usb-0:4:1.0-scsi-0:0:0:0
> REMOVE_CMD=/etc/hotplug/usb/iriver remove
> DEVNAME=/dev/scsi/host24/bus0/target0/lun0/disc
> DEVLINKS=/dev/sdb /dev/discs/disc2/disc /dev/disk/by-id/usb-iriver_MassStorage_Disc /dev/disk/by-path/pci-0000:00:10.3-usb-0:4:1.0-scsi-0:0:0:0 /dev/iriver

and the rules based on SYSFS{ID_VENDOR} work as expected. (Well, there's 
one bug that I'm chasing down -- REMOVE_CMD did *not* execute, and 
neither did the other remove rules. I don't know why just yet.)

So, in summary, SYSFS is available but only for some USB items.

Please let me know if you need any further information.

-- 
  Moshe Yudkowsky
  work: http://www.Disaggregate.com
  book: http://www.PebbleAndAvalanche.com


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