I've been trying to make unicorn-modules working on Ubuntu with BeWAN USB Modem but it fails on load, while it used to work on Dapper.
May this help
echo -e "\ndeb http://ppa.launchpad.net/rzr/ubuntu gutsy main\n" >> /etc/apt/sources.list sudo apt-get update sudo m-a prepare ; m-a a-i --text unicorn && depmod -a dpkg -L unicorn-modules-$(uname -r) sudo modprobe -v unicorn_usb_atm ; dmesg | tail
# dpkg -L unicorn-modules-2.6.22-14-386
/lib/modules/2.6.22-14-386/extra/unicorn_usb_atm.ko
# depmod -a
# modprobe -v unicorn_usb_atm
insmod /lib/modules/2.6.22-14-386/extra/unicorn_usb_atm.ko
# dmesg
[ 130.624000] Call Trace:
[ 130.624000] [<c01aa8af>] sysfs_make_dirent+0x2f/0x50
[ 130.624000] [<c0167576>] __kmalloc+0x16/0x90
[ 130.624000] [<e191fe72>] alloc_obj+0x42/0x160 [unicorn_usb_atm]
[ 130.624000] [<e19201b5>] new_object+0x5/0x50 [unicorn_usb_atm]
[ 130.624000] [<e1920386>] xm_getmem+0x16/0x70 [unicorn_usb_atm]
[ 130.624000] [<e18d57ed>] AMSW_Modem_SW_Init+0x1d/0x180 [unicorn_usb_atm]
[ 130.624000] [<e19257fd>] unicorn_atm_startdevice+0x1d/0x80 [unicorn_usb_atm]
[ 130.624000] [<e1922504>] msw_init+0x14/0x140 [unicorn_usb_atm]
[ 130.624000] [<e19259c4>] unicorn_attach+0xa4/0x1b0 [unicorn_usb_atm]
[ 130.624000] [<e191d9ac>] probe_unicorn_usb+0x50c/0x860 [unicorn_usb_atm]
[ 130.624000] [<e08fcd03>] usb_probe_interface+0x93/0xd0 [usbcore]
[ 130.624000] [<c0243dfd>] driver_probe_device+0x8d/0x190
[ 130.624000] [<c024406a>] __driver_attach+0x9a/0xa0
[ 130.624000] [<c02431eb>] bus_for_each_dev+0x3b/0x60
[ 130.624000] [<c0243c76>] driver_attach+0x16/0x20
[ 130.624000] [<c0243fd0>] __driver_attach+0x0/0xa0
[ 130.624000] [<c02435ba>] bus_add_driver+0x8a/0x1b0
[ 130.624000] [<e08fc7b7>] usb_register_driver+0x87/0x100 [usbcore]
[ 130.624000] [<e0c1b046>] unicorn_usb_init+0x46/0x5d [unicorn_usb_atm]
[ 130.624000] [<c013a4db>] sys_init_module+0x15b/0x16f0
[ 130.624000] [<c01e14c7>] rb_insert_color+0x87/0xb0
[ 130.624000] [<c0103f62>] sysenter_past_esp+0x6b/0xa9
http://gcc.gnu.org/onlinedocs/gcc-4.2.2/gcc/TMS320C3x_002fC4x-Options.html#index-mregparm-1605