Hi Andrea,
I am using hotplug and udev. Thanks for the Gnome tips; I'd still like to solve this at a lower level if possible.
Do you know the process by which the system goes from (a) discovering that a device was connected to a USB port, to (z) binding a driver to that device?
The reason I'm asking is that I'm trying to make my camera work on Sarge. I *suspect* that no driver is getting loaded for it. I figure that understanding the process by which drivers get bound to hotplugged devices will let me better debug the problem.
Thanks for your help, Christian
Andrea Vettorello wrote:
On Tue, 30 Nov 2004 08:44:57 -0500, Christian Convey <[EMAIL PROTECTED]> wrote:
Hey guys,
I've got a usb camera (Kodak DX6490). I'm starting to suspect from various tinkering I've done (in Knoppix, FC3, and Sarge) that the kernel can't find a module to associate with the camera, and that's causing my problems.
In 2.6/Sarge... - How does the kernel know which driver to use for a USB device I plug in?
The kernel alone do nothing, you need "userland" programs to load kernel modules when a new HD is plugged, like the "hotplug" package.
If you only need to access the photos, usually you only need to load the "usb-storage" kernel module and maybe the "fat" or "vfat".
If you use Gnome, and you install "udev", "hal", "gnome-volume-manager" and "hotplug", you usually end with a nice icon on the desktop automagically whenever you attach a USB mass storage to your pc, and digital cameras can be seen like USB mass storage.
- What's the easiest reliable way of knowing whether or not the kernel managed to bind a driver to a USB device I plug in?
Looking in your /varl/log/syslog or perusing your /proc/bus/usb or /sys/bus/sys. There are utilities that do this for you and show a nice tree with device informations.
Andrea
-- Christian Convey Computer Scientist, Naval Undersea Warfare Center Newport, RI
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