I'll be frank when I say I regret even mentioning my hardware. It only distracts from the issue.

Truth be told, the iwl3945 suffers from terrible speed issues that limit it to 1Mbps/1Mbps in most situations. This was not present in ipw3945.

See the following:

http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=1932
http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=1592
https://bugs.launchpad.net/linux/+bug/581936
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/340418


Anyway, here's some output.

eric@kingfisher:~$ ndiswrapper -l
netw39x5 : driver installed
	device (8086:4222) present (alternate driver: iwl3945)


[   13.231542] ndiswrapper version 1.56 loaded (smp=yes, preempt=no)
[   14.098131] ndiswrapper: driver netw39x5 (Intel,01/30/2007,10.5.1.84) loaded
[   14.109680] ndiswrapper 0000:0c:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[   14.109760] ndiswrapper 0000:0c:00.0: setting latency timer to 64
[   14.116758] ndiswrapper: using IRQ 17
[   14.117196] Modules linked in: snd_seq_midi snd_rawmidi snd_seq_midi_event i915(+) snd_seq drm_kms_helper snd_timer snd_seq_device drm r852 sm_common snd i2c_algo_bit psmouse serio_raw coretemp soundcore btusb bluetooth usbhid nand hid ndiswrapper(+) snd_page_alloc dell_wmi nand_ids nand_ecc mtd dell_laptop dcdbas video lp output parport intel_agp agpgart b44 firewire_ohci sdhci_pci sdhci ssb firewire_core led_class crc_itu_t mii
[   14.117324]  [<f834e9f0>] ? MmMapIoSpace+0x0/0x20 [ndiswrapper]
[   14.117351]  [<f834ea03>] ? MmMapIoSpace+0x13/0x20 [ndiswrapper]
[   14.117369]  [<f834ea03>] MmMapIoSpace+0x13/0x20 [ndiswrapper]
[   14.117462]  [<f8351d40>] ? IoIrpSyncComplete+0x0/0x50 [ndiswrapper]
[   14.117482]  [<f83500d8>] ? ZwCreateFile+0xa8/0x270 [ndiswrapper]
[   14.117500]  [<f83596b6>] ? mp_init+0x66/0x220 [ndiswrapper]
[   14.117519]  [<f835adf5>] ? ndis_start_device+0x15/0x8d0 [ndiswrapper]
[   14.117537]  [<f83540e9>] ? pdoDispatchPnp+0x49/0xf0 [ndiswrapper]
[   14.117555]  [<f8351756>] ? IofCallDriver+0x56/0xc0 [ndiswrapper]
[   14.117573]  [<f8351cef>] ? IoSyncForwardIrp+0x7f/0xd0 [ndiswrapper]
[   14.117591]  [<f8352575>] ? IoAllocateIrp+0x65/0x80 [ndiswrapper]
[   14.117609]  [<f835b743>] ? NdisDispatchPnp+0x93/0x140 [ndiswrapper]
[   14.117626]  [<f8351756>] ? IofCallDriver+0x56/0xc0 [ndiswrapper]
[   14.117644]  [<f8353318>] ? IoSendIrpTopDev+0xe8/0x140 [ndiswrapper]
[   14.117662]  [<f83536ff>] ? pnp_start_device+0x3f/0x90 [ndiswrapper]
[   14.117680]  [<f83539b0>] ? wrap_pnp_start_device+0xe0/0x170 [ndiswrapper]
[   14.117698]  [<f8353b85>] ? wrap_pnp_start_pci_device+0x55/0x70 [ndiswrapper]
[   14.117815]  [<f834630d>] ? loader_init+0x9d/0x150 [ndiswrapper]
[   14.117833]  [<f8354277>] ? wrap_procfs_init+0x47/0xc0 [ndiswrapper]
[   14.117848]  [<f805207f>] ? wrapper_init+0x7f/0xb7 [ndiswrapper]
[   14.117869]  [<f8052000>] ? wrapper_init+0x0/0xb7 [ndiswrapper]
[   14.471328] usbcore: registered new interface driver ndiswrapper
[   17.009572] IP: [<f8358cec>] set_multicast_list+0xcc/0x160 [ndiswrapper]
[   17.009611] Modules linked in: snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm joydev snd_seq_midi snd_rawmidi snd_seq_midi_event i915 snd_seq drm_kms_helper snd_timer snd_seq_device drm r852 sm_common snd i2c_algo_bit psmouse serio_raw coretemp soundcore btusb bluetooth usbhid nand hid ndiswrapper snd_page_alloc dell_wmi nand_ids nand_ecc mtd dell_laptop dcdbas video lp output parport intel_agp agpgart b44 firewire_ohci sdhci_pci sdhci ssb firewire_core led_class crc_itu_t mii
[   17.009678] Pid: 675, comm: wrapndis_wq Tainted: P        W   2.6.35-13-generic #18-Ubuntu       /MXC061                          
[   17.009698] EIP is at set_multicast_list+0xcc/0x160 [ndiswrapper]
[   17.009721] Process wrapndis_wq (pid: 675, ti=f3f68000 task=f393d8d0 task.ti=f3f68000)
[   17.009886]  [<f8359448>] ? ndis_worker+0x1c8/0x3d0 [ndiswrapper]
[   17.010000]  [<f8359280>] ? ndis_worker+0x0/0x3d0 [ndiswrapper]
[   17.010401] EIP: [<f8358cec>] set_multicast_list+0xcc/0x160 [ndiswrapper] SS:ESP 0068:f3f69ee0