Similar problem with my Realtek wifi adaptor (which usually work using only the wifi.tcz package)
tc@box:~$ sudo wifi.sh
No wifi devices found!
tc@box:~$
tc@box:~$ lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter
Bus 001 Device 005: ID 03f0:0024 Hewlett-Packard KU-0316 Keyboard
tc@box:~$
tc@box:~$ lsmod
Module Size Used by Not tainted
snd_usb_audio 116282 0
snd_usbmidi_lib 18748 1 snd_usb_audio
snd_rawmidi 20181 1 snd_usbmidi_lib
snd_seq_device 6034 1 snd_rawmidi
snd_hwdep 5901 1 snd_usb_audio
snd_bcm2835 16125 0
snd_pcm 75156 2 snd_usb_audio,snd_bcm2835
snd_page_alloc 4684 1 snd_pcm
snd_timer 19242 1 snd_pcm
snd 54271 8 snd_usb_audio,snd_usbmidi_lib,snd_rawmidi,snd_seq_device,snd_hwdep,snd_bcm2835,snd_pcm,snd_timer
tc@box:~$
The output below is from 5.1rc2 - where you can see the wifi adaptor module is loaded =" 8192cu ":
tc@box:~$ lsmod
Module Size Used by Not tainted
snd_usb_audio 116146 0
snd_usbmidi_lib 18720 1 snd_usb_audio
snd_rawmidi 20169 1 snd_usbmidi_lib
snd_seq_device 6022 1 snd_rawmidi
snd_hwdep 5889 1 snd_usb_audio
snd_bcm2835 16113 0
snd_pcm 75183 2 snd_usb_audio,snd_bcm2835
snd_page_alloc 4672 1 snd_pcm
snd_timer 19230 1 snd_pcm
snd 54258 8 snd_usb_audio,snd_usbmidi_lib,snd_rawmidi,snd_seq_device,snd_hwdep,snd_bcm2835,snd_pcm,snd_timer
8192cu 489243 0
squashfs 28699 23
tc@box:~$
Steen