Hotplug only coldplugs...

[Matthew Percival <matthew@capgo.com>]

G'Day,

	I hope it is OK to post these sorts of questions here; I was not sure
where it should be taken.

	I have been trying to set up diethotplug for an embedded system, but
have not had any success with actually hotplugging devices.  The only
devices that are to be attached are a compact flash memory device and a
USB flash memory, which will always be on hda1 and sda1 respectively.
After much playing around with the scripts, I have been able to get the
USB memory to mount when `/etc/init.d/hotplug start' is called, which
seems to be a good start, but I have not been able to get any effect
outside of this case.  I have not spend much time on compact flash yet,
which is why the scripts for it are not yet working.

	In one test I tried, I left the device plugged in, unmounted it, and
run `hotplug usb', but nothing seemed to happen --- I even added an echo
statement the the start of /etc/hotplug/usb.rc, but did not see it.
Since coldplugging works, I would assume my scripts are all correctly
set up, so I am a little stuck on what the problem could be.  In
addition, /proc/sys/kernel/hotplug says hotplug needs to be
at /sbin/hotplug, which it is, but when I replace hotplug with a script
that merely echoes any arguments it receives, and try plugging in the
device, there is no response.  Perhaps this is to be expected, but it
seems odd to me.

	If anyone could offer any advice to what I should try doing here, it
would be most appreciated.

	Thanks,

	Matthew Percival

PS	When the system is used as a USB device rather than a USB host, can
hotplug be used somehow to identify when it is connected to a host?  I
have not been able to find anything saying it can, but I can always
hope.



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