root@marty-kubuntu:~# rmmod ndiswrapper
ERROR: Module ndiswrapper does not exist in /proc/modules
root@marty-kubuntu:~# ndiswrapper -l
athfmwdl : driver installed
device (2001:3A03) present
neta5agu : driver installed
root@marty-kubuntu:~# ndiswrapper -v
utils Error: no version specified!
driver version: 1.38
vermagic: 2.6.20-15-generic SMP mod_unload 586
root@marty-kubuntu:~# depmod -a
root@marty-kubuntu:~# modprobe ndiswrapper
root@marty-kubuntu:~# iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
root@marty-kubuntu:~# rmmod ndiswrapper
Segmentation fault
root@marty-kubuntu:~# rmmod ndiswrapper
ERROR: Removing 'ndiswrapper': Device or resource busy
The end of the dmesg says:
[ 903.828000] ndiswrapper (miniport_init:265): assuming WDM (non-NDIS) driver
[ 903.828000] usbcore: registered new interface driver ndiswrapper
[ 938.464000] usbcore: deregistering interface driver ndiswrapper
[ 938.464000] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000064
[ 938.464000] printing eip:
[ 938.464000] f95b91d6
[ 938.464000] *pde = 00000000
[ 938.464000] Oops: 0000 [#1]
[ 938.464000] SMP
[ 938.464000] Modules linked in: ndiswrapper radeon drm rfcomm l2cap bluetooth ppdev speedstep_centrino cpufreq_userspace cpufreq_powersave cpufreq_conservative cpufreq_ondemand cpufreq_stats freq_table pcc_acpi tc1100_wmi sony_acpi dev_acpi container sbs button i2c_ec i2c_core asus_acpi backlight battery video dock ac nls_iso8859_1 nls_cp437 vfat fat sbp2 parport_pc lp parport joydev snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss xpad pcmcia snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device serio_raw psmouse intel_agp snd soundcore snd_page_alloc agpgart sdhci mmc_core tifm_7xx1 tifm_core yenta_socket rsrc_nonstatic pcmcia_core iTCO_wdt iTCO_vendor_support shpchp pci_hotplug tsdev evdev ext3 jbd mbcache usbhid hid sg sd_mod sr_mod cdrom ahci generic ata_generic usb_storage libusual 8139too ata_piix libata scsi_mod ohci1394 ieee1394 8139cp mii ehci_hcd uhci_hcd usbcore thermal processor fan fbcon tileblit font bitblit softcursor vesafb capability commoncap
[ 938.464000] CPU: 0
[ 938.464000] EIP: 0060:[<f95b91d6>] Tainted: P VLI
[ 938.464000] EFLAGS: 00210286 (2.6.20-15-generic #2)
[ 938.464000] EIP is at miniport_pnp_event+0x26/0x110 [ndiswrapper]
[ 938.464000] eax: c0000001 ebx: e5480400 ecx: e330be80 edx: 00000002
[ 938.464000] esi: e330bba0 edi: 00000000 ebp: e5480400 esp: ebad3d28
[ 938.464000] ds: 007b es: 007b ss: 0068
[ 938.464000] Process rmmod (pid: 5777, ti=ebad2000 task=e5a9b560 task.ti=ebad2000)
[ 938.464000] Stack: 462dd3f7 1531dbdb e330bb14 e330bb54 00000000 e330bda0 e330bba0 ebad3e84
[ 938.464000] f95ba216 e330bda0 e330ba80 e5ae6484 c01a04a8 dfffcac0 c01a9d4d dfc79a78
[ 938.464000] dfc79a74 e5ae6350 e3bfd84c e3bfd84c c018760c e5ae6350 c01adafa c1806a40
[ 938.464000] Call Trace:
[ 938.464000] [<f95ba216>] NdisDispatchPnp+0x126/0xd80 [ndiswrapper]
[ 938.464000] [<c01a04a8>] inotify_d_instantiate+0x18/0x80
[ 938.464000] [<c01a9d4d>] proc_get_inode+0xfd/0x160
[ 938.464000] [<c018760c>] d_rehash+0x1c/0x30
[ 938.464000] [<c01adafa>] proc_lookup+0xca/0xe0
[ 938.464000] [<c011e341>] __activate_task+0x21/0x40
[ 938.464000] [<c011e341>] __activate_task+0x21/0x40
[ 938.464000] [<c0120706>] try_to_wake_up+0x46/0x480
[ 938.464000] [<c0120706>] try_to_wake_up+0x46/0x480
[ 938.464000] [<f95b3488>] IoAllocateIrp+0x68/0xa0 [ndiswrapper]
[ 938.464000] [<f95b3f95>] IoBuildAsynchronousFsdRequest+0x35/0x170 [ndiswrapper]
[ 938.464000] [<f95ae5c1>] get_current_nt_thread+0xc1/0xf0 [ndiswrapper]
[ 938.464000] [<f95b40eb>] IoQueueThreadIrp+0x1b/0x130 [ndiswrapper]
[ 938.464000] [<f95b312a>] IofCallDriver+0x3a/0xa0 [ndiswrapper]
[ 938.464000] [<f95b88ab>] IoSendIrpTopDev+0xbb/0x120 [ndiswrapper]
[ 938.464000] [<f95b8983>] pnp_remove_device+0x73/0x1d0 [ndiswrapper]
[ 938.464000] [<f8895d20>] usb_unbind_interface+0x50/0xa0 [usbcore]
[ 938.464000] [<c02578a8>] __device_release_driver+0x68/0xa0
[ 938.464000] [<c0257ec2>] driver_detach+0xd2/0xe0
[ 938.464000] [<c0257457>] bus_remove_driver+0x67/0x90
[ 938.464000] [<c0257ef8>] driver_unregister+0x8/0x20
[ 938.464000] [<f88955da>] usb_deregister+0x9a/0xb0 [usbcore]
[ 938.464000] [<f95a60f3>] loader_exit+0x13/0x90 [ndiswrapper]
[ 938.464000] [<c014edc9>] stop_machine_run+0x39/0x50
[ 938.464000] [<f95b82b5>] module_cleanup+0x5/0x40 [ndiswrapper]
[ 938.464000] [<c0145dba>] sys_delete_module+0x12a/0x190
[ 938.464000] [<c02f06af>] do_page_fault+0x33f/0x5f0
[ 938.464000] [<c01031f0>] sysenter_past_esp+0x69/0xa9
[ 938.464000] =======================
[ 938.464000] Code: c0 c3 8d 76 00 83 ec 20 89 5c 24 14 89 c3 89 74 24 18 89 7c 24 1c 89 4c 24 10 8b 48 04 8b 41 5c 8b b8 2c 02 00 00 b8 01 00 00 c0 <8b> 77 64 85 f6 74 37 8b 43 0c a8 02 74 40 83 fa 02 74 4d 83 fa
[ 938.464000] EIP: [<f95b91d6>] miniport_pnp_event+0x26/0x110 [ndiswrapper] SS:ESP 0068:ebad3d28
[ 938.464000]
Please try with latest ndiswrapper from ndiswrapper.sf.net (1.49rc1 at the time of this writing) and don't forget to run a sudo make uninstall before make install.