Re: [debian-knoppix] usbdevfs
Hi Chris,
thxs for the info!
And tonight I will try what you said on my linux computer cos' I have this version installed by hddinstall :Knoppix 3.2 2003-05-03
Then it must explain why I cannot get the hotplug working!!! thxs, for mentionning the bug, you are the first one speaking to me about it!
I'll let you know tomorrow if it works! but I'm sure it will :)
Regards,
Ludo
> Hi Ludo,
>
> On Wed, Jul 23, 2003 at 06:37:54 +0000, Coume wrote:
>
> > If anyone knows (even a bit) things about that, it would be great to
> > have the small explanation.
>
> The following is from the help text in the kernel configuration:
>
> ---------------------------------------------------------------------
> Preliminary USB device filesystem
>
> CONFIG_USB_DEVICEFS:
>
> If you say Y here (and to "/proc file system support" below), you
> will get a file /proc/bus/usb/devices which lists the devices
> currently connected to your USB busses, a file /proc/bus/usb/drivers
> which lists the USB kernel client drivers currently loaded, and for
> every connected device a file named "/proc/bus/usb/xxx/yyy", where
> xxx is the bus number and yyy the device number; the latter files
> can be used by user space programs to talk directly to the device.
> These files are "virtual", meaning they are generated on the fly
> and not stored on the hard drive.
>
> For the format of the /proc/bus/usb/ files, please read
> Documentation/usb/proc_usb_info.txt.
>
> Please note that this code is completely unrelated to devfs, the
> "/dev file system support".
>
> Most users want to say Y here.
> ---------------------------------------------------------------------
>
> So usbdevfs is necessary for some userspace tools to get usb info
> (usbview, lsusb, ...) and for usb drivers running in userspace. It isn't
> needed for drivers in kernelspace like usb-storage and such.
>
> If you are using a knx-hdinstall'd version of a recent Knoppix, there
> might be a bug in /etc/init.d/hotplug. The script exits too early and
> does not run all hotplug .rc scripts, including mounting usbdevfs.
> At least Knoppix 3.2 2003-05-03 has this bug. You can try changing the
> script to:
>
> [...]
> start)
> echo -n "Starting hotplug subsystem:"
> if [ "$runlevel" = "S" ]; then
> touch /etc/nohotplug
> # elif grep -q "^/sbin/hotplug$" /proc/sys/kernel/hotplug; then
> # # but, pending hotplug action will be executed
> # rm -f /etc/nohotplug
> # echo ".... already started. process pending events."
> # exit 0
> fi
> echo /sbin/hotplug > /proc/sys/kernel/hotplug
> [...]
>
> bye,
> Chris
> --
> Christian Perle perle@itm.tu-clausthal.de
> Grunaer Str. 31 http://www.itm.tu-clausthal.de/~perle/
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