lenny / testing : missing USB devide files

[Jean-Pierre HOFER <jph@stephenson.dhis.org>]

I am unable to find any USB device files on my system (HP C360, debian testing
2.6.26-1) and to plug any USB device.

lspri -v | grep HCI
02.08.0 USB Controller: NEC Corporation USB (rev 41) (prog-if 10 [OHCI])
02:08.1 USB Controller: NEC Corporation USB (rev 41) (prog-if 10 [OHCI])
02:08.2 USB Controller: NEC Corporation USB 2.0 (rev 02) (prog-if 20 [EHCI])

It seems that the USB controller was detected at boot time since the drivers
are loaded :

lsmod
[...]
ohci_hcd             38568  0
ehci_hcd             53328  0
[...]


This problem did not occur under Debian/etch.

Now, how to mount USB storages ?
Is there a workaround ?

Thanks.

Jean-Pierre