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How To: Fix Wireless Connection Drops on the Intel 4965 Chipset in Jaunty 9.04

r3dux | April 29, 2009

There’s a problem with the iwlagn wireless driver that ships with Jaunty by default, and you’ll find that when wireless connectivity drops you’ll have errors like these in your dmesg log:

[126774.231915] iwlagn: Microcode SW error detected. Restarting 0×2000000.
[126774.252811] iwlagn: MAC is in deep sleep!

Now, you can reset the connection easily enough with sudo ifdown wlan0 && sudo ifup wlan0, but thankfully the fix is already in the updated version of the iwglan driver in backports, so just go:

sudo apt-get install linux-backports-modules-jaunty

A swift reboot later and wireless ain’t gonna drop out on you any time soon – hurrah!

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How-To, Linux
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backports, iwlagn, Wireless
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