APC SU1400XLT User Manual download pdf (Page 14)

usbdevfs

hub

96-111: hiddev

hid

On Linux-2.6.x, make sure the sysfs filesystem is mounted on /sys and do:

ls -l /sys/bus/usb/drivers/

...where you should get:

total 0

drwxr-xr-x 2 root root 0 May 1 18:55 hid

drwxr-xr-x 2 root root 0 May 1 18:55 hiddev

drwxr-xr-x 2 root root 0 May 1 18:55 hub

drwxr-xr-x 2 root root 0 May 1 18:55 usb

drwxr-xr-x 2 root root 0 May 1 18:55 usbfs

...or perhaps something like:

total 0

drwxr-xr-x 2 root root 0 Jan 6 15:27 hiddev

drwxr-xr-x 2 root root 0 Jan 6 15:28 hub

drwxr-xr-x 2 root root 0 Jan 6 15:28 usb

drwxr-xr-x 2 root root 0 Jan 6 15:27 usbfs

drwxr-xr-x 2 root root 0 Jan 6 15:28 usbhid

If your 2.6.x system does not have the /sys/bus/usb directory, either you do not have sysfs mounted on

/sys or the USB module(s) have not been loaded. (Check /proc/mounts to make sure sysfs is mounted.)

A USB UPS needs all of these drivers -- the USB device filesystem, the USB hub, the Human Interface

Device subsystem driver, and the Human Interface Device driver. If you are compiling your own kernel,

you want to enable

CONFIG_USB

CONFIG_USB_HID

CONFIG_USB_HIDDEV

CONFIG_USB_DEVICEFS

...as well as at least one USB Host Controller Driver...

CONFIG_USB_UHCI_HCD (linux-2.6.x)

CONFIG_USB_OHCI_HCD (linux-2.6.x)

CONFIG_USB_UHCI (linux-2.4.x)

CONFIG_USB_OHCI (linux-2.4.x)

Device Nodes

Apcupsd accesses USB UPSes via the hiddev device nodes. Typically these are located in

/dev/hiddevN, /dev/usb/hiddevN or /dev/usb/hiddev/hiddevN (where N is a digit 0 thru 9).

Some distributions (some Debian releases, possibly others) do not provides these device nodes for you,

so you will have to make them yourself. Check /dev, /dev/usb, and /dev/usb/hiddev and if you

cannot find the hiddevN nodes, run (as root) the examples/make-hiddev script from the apcupsd

source distribution.

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APC SU1400XLT User Manual Page 14