Arthur Marsh wrote:
> gthumb had been working happily until sometime after 23 May 2006 when
> some upgrade or other stopped the running of the script that sets the
> permissions on the file created when my Canon Ixus v camera is plugged
> in via USB.
SHIT. I'm getting sick of udev, sorry.
> I have found it difficult to debug since I do not know how to find out what
> is being done by "udev_run_hotplugd usb" and what is being done by
> "udev_run_devd usb", and why /etc/hotplug/usb/libgphoto2 is not
> apparently being run and in any case is not setting the groups of the
> created files to "camera" so that gthumb can access the camera.
/etc/hotplug/usb/libgphoto2 is not run when udev is used; instead
there are rules in /etc/udev/libgphoto2.rules to set appropriate
ownerships.
What is your kernel version ?
Do you have a /etc/udev/rules.d/025_libgphoto2.rules symlink ?
> Can you suggest how to debug the failure of udev to cause the running of
> the libgphoto2 script to change the permissions of the /dev/bus/usb
> and/or /proc/bus/usb file(s) needed by gthumb?
The udev guys are silent[1], I'm shooting in the dark.
You can use udevmonitor before plugging your camera, it will output
several /devices/ lines, which you can pass to udevinfo, like this:
udevinfo -a -p /devices/pci0000:00/0000:00:1d.7/usb4/4-1/4-1:1.0
It will output things which will look correct and you'll then be in
the dark. Welcome.
Anyway there were two changes in 2.1.6-12, you could try to undo
them, one by one, in /etc/udev/libgphoto2-2.rules,
1. SUBSYSTEM!="usb_device", GOTO="libgphoto2_rules_end"
replace it with BUS!="usb", GOTO="libgphoto2_rules_end"
(and remove the line if that still fails)
2. prefix each SYSFS{idVendor}=="0553" by SUBSYSTEM=="usb_device", ->
SYSFS{idVendor}=="0553", SYSFS{idProduct}=="0202", MODE="0660",
GROUP="camera"
to
SUBSYSTEM=="usb_device", SYSFS{idVendor}=="0553", SYSFS{idProduct...
You could also test if compatibility hotplug script is being run, add
something like `echo "hello world" > /tmp/hello' to the top of
/etc/hotplug/usb/libgphoto2; while you are at it you could also echo
$ACTION, $DEVICE and $DEVNAME.
Sorry I can't help you more.
Frederic
[1] http://marc.theaimsgroup.com/?l=linux-hotplug-devel&m=114876475106203&w=2
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