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Servers & Networking Discuss any Fedora server problems and Networking issues such as dhcp, IP numbers, wlan, modems, etc.

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  #1  
Old 22nd December 2011, 06:29 AM
tkalfaoglu Offline
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linuxfirefox
cannot get rid of arc4 module

In an attempt to use my USB TPLINK WN321G (Atheros AR8152) wireless adaptor to create a wifi AP, I quickly discovered that the fedora-15 supplied driver, arc4 has no "Master" mode that would allow me to do this.

So, I tried echo blacklist arc4 > /etc/modprobe.d/blacklist-arc4.conf
and a dracut -f /boot/initramfs-$(uname -r).img $(uname -r)
I even added rdblacklist=arc4 to the end of my kernel line in /boot/grub/menu.lst

I downloaded and compiled madwifi and did make install.

Despite all these, and numerous reboots, when I plug in the wifi adaptor, arc4 still gets loaded..
I cannot even unload it, as it says "module arc4 is in use"

Any ideas what else to try?

Thanks, -t

Last edited by tkalfaoglu; 22nd December 2011 at 06:31 AM.
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  #2  
Old 22nd December 2011, 06:42 AM
JEO Offline
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linuxfirefox
Re: cannot get rid of arc4 module

I don't think that arc4 is a wireless module. It is a module that implements a cipher algorithm. So you need to blacklist a different module if a kernel module is loading for your card. Most likely one that starts with ath?
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  #3  
Old 22nd December 2011, 08:01 AM
tkalfaoglu Offline
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linuxfirefox
Re: cannot get rid of arc4 module

Ah, very true! Thank you, it was instead rt2800usb that was getting loaded.
When I blacklisted that, it was accepted, but the madwifi drivers ignored my hardware
So I gave up on the whole thing, re-enabled rt2800usb

-turgut
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  #4  
Old 22nd December 2011, 02:51 PM
JEO Offline
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Re: cannot get rid of arc4 module

I have an adapter that uses that same driver. It is for Ralink chipsets, not Atheros. Type the command "lsusb" to see.
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  #5  
Old 22nd December 2011, 03:03 PM
flyingfsck Online
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Re: cannot get rid of arc4 module

Arc4 is used by SSH.
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