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Wifi freezes notebook
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I have successfully installed ML 10.8.5 on my Del N411Z notebook and it is working like a charm.


Build in wifi card isn't working for it is Intel and therefore I use a DWA-131 Rev B  Wifi USB adapter.

Driver is Realtek RTL8192CU      


Problem is that every time after 30-45 minutes my notebook freezes.


When booting with -v flag i get this error message:


panic (cpu 2 caller 0xffffff800022e436): "thread_invoke: preemption_level 1,possible cause: blocking while holding a spin lock, or within interrupt context "@/SourceCache/xnu/xnu-2050.48.12/osfmk/kern/sched_prim.c:2076


It is not always CPU 2. This varys


I have a I5 with 4 cores.


In my BIOS there are no options to play with


Does anyone nows a solution for this problem?


Merk Dell Type Inspironicon1.png N411Z

Processor Processortype Intel Core i5 2340M

Kloksnelheid processor 2,4 GHz

Aantal cores 4 

Opslag Harde Schijf 500 GB

Toerental harde schijf 5400

RAM Geheugen 8 GB  

USB 3.0-poorten 2

USB 2.0-poorten 1

eSata - Uitbreidingsslots - Firewire -

Wi-Fi 802.11 b/g/n Intel N1030

Video-output HDMI

Bluetooth 3.0

Scherm Resolutie 1366 x 768

Videokaart Intel HD Graphics 3000

Schermgrootte 14 inch

Schermtype HD+ LED


Thanks in advance,




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4 answers to this question

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Thanks for support.


The problem is solved.


I deleted the ethernet adapter entrance in the ethernet configuration.

Now the wifi adapter is the only device in my network and everything works perfectly.


Thanks for the support

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  • 0

Already tried, doesn't make a difference.


Tried a different wifi adapter TP Link

This one is using a Ralink driver, same problem

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