I have Ubuntu 12.04LTS and the problem appear to be the userspace program not inside the kernel.
$ uname -a Linux HEX 3.2.0-36-generic-pae #57-Ubuntu SMP Tue Jan 8 22:01:06 UTC 2013 i686 i686 i386 GNU/Linux $ lsmod | grep usbip usbip_host 22084 0 usbip_core 15333 2 usbip_host,vhci_hcd usespace program are looking for: $ sudo strace usbipd -d .... munmap(0xb7798000, 4096) = 0 lstat64("/sys/bus/usb/drivers/usbip", 0xbfc1c250) = -1 ENOENT (No such file or directory) write(2, "usbip err: stub_driver.c: 33 (o"..., 103usbip err: stub_driver.c: 33 (open_sysfs_stub_driver) usbip_common_mod.ko and usbip.ko must be loaded ) = 103 gettimeofday({1358969452, 249982}, NULL) = 0 open("/usr/lib/i386-linux-gnu/charset.alias", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory) open("/usr/lib/i386-linux-gnu/gconv/gconv-modules.cache", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=26256, ...}) = 0 The userspace program are lookig for /sys/bus/usb/drivers/usbip/ while at the moment i have /sys/bus/usb/drivers/usbip-host/ Usbip version $ usbip -v ** (process:4498): WARNING **: running non-root? usbip 0.1.7 ($Id: vhci_attach.c 42 2007-09-07 12:07:51Z hirofuchi $) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/900384 Title: usbipd requires usbip_common_mod.ko and usbip.ko kernel modules, which are not available in any package To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/900384/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs