Problem with Fritz!WLAN USB Stick N

Markus Schönhaber ubuntu-users at
Fri Jul 2 09:30:10 UTC 2010

02.07.2010 10:25, Leander Jedamus:

> I read that a Fritz!WLAN USB Stick N should work with Ubuntu 10.04. But 
> I have problems on my two machines. The Hardware seems to be okay, 
> because the Stick runs unter Vista with no problems.

I own a Friz!WLAN USB Stick N 2.4, lsusb shows it as
vendor 057c, device 8402
Since the list of loaded modules in the stack trace below contains
ar9170usb (the same driver as mine uses) my stick seems to be similar
enough to yours.

> I noticed that the LED's are not blinking the same way as under Vista. 
> In /var/log/messages there is the following:

Yep, that's what I see too. The LED which is supposed to signal USB
connectivity blinks when data is transferred and vice versa.

> Jul  2 10:16:02 arthur kernel: [  199.022067] ------------[ cut here 
> ]------------
> Jul  2 10:16:02 arthur kernel: [  199.022099] WARNING: at 
> /build/buildd/linux-2.6.32/kernel/softirq.c:143 
> local_bh_enable_ip+0x7b/0xa0()
> Jul  2 10:16:02 arthur kernel: [  199.022111] Hardware name: Satellite A350D
> Jul  2 10:16:02 arthur kernel: [  199.022118] Modules linked in: cryptd 
> aes_x86_64 aes_generic isofs binfmt_misc ppdev nls_iso8859_1 nls_cp437 
> vfat fat joydev snd_hda_codec_atihdmi snd_hda_codec_realtek fbcon 
> tileblit font bitblit softcursor vga16fb vgastate snd_hda_intel arc4 
> snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy 
> snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq radeon 
> ar9170usb snd_timer snd_seq_device ttm uvcvideo ath9k mac80211 
> drm_kms_helper videodev v4l1_compat v4l2_compat_ioctl32 jmb38x_ms 
> psmouse ath serio_raw snd cfg80211 memstick edac_core edac_mce_amd 
> sdhci_pci sdhci drm i2c_algo_bit i2c_piix4 led_class soundcore 
> snd_page_alloc video output lp parport usbhid hid r8169 ohci1394 
> usb_storage mii ieee1394 pata_atiixp ahci
I have no idea what exactly went wrong.

> My one machine is a AMD Turion X2
> What can I do now?

The first thing I'd try is to install the
package that matches your kernel, for example
This should give you a more recent version of the ar9170usb module and
it's dependencies.

If that doesn't help, you could use ndiswrapper to load the Windows
driver for the stick. But that isn't exactly easy, since Lucid comes
with a version of the ndiswrapper kernel module that, in my experience,
won't work with the windows driver. So you'd have to build a more recent
ndiswrapper yourself and make sure the version coming with Lucid doesn't
get loaded (for example by moving ndiswrapper.ko from /lib/modules/...).


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