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I have an Acer Aspire One D257 notebook I installed Ubuntu 12.10 on. Everything worked until I allowed the automatic updates to be installed. It appears that applying the updates breaks the wireless network adapter on this machine. It reports "Network device not managed".

The regular Ubuntu flavour was too slow anyway, so I tried Lubuntu 12.10 (Live) and discovered it was really faster than Ubuntu. I then decided to install it with automatic updates and after the first reboot the Wi-Fi network did not work anymore, similar to my attempt with Ubuntu.

Any idea on how to fix this? I'd like to be able to keep my system up to date.

a newbie of Linux here

The relevant output of lspci -nn is:

02:00.0 Network controller [0280]: Atheros Communications Inc. AR9285
Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
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Please provide more information about your WiFi hardware. Post the relevant output of lspci -nn from a terminal (or lsusb if it's connected via USB). –  gertvdijk Jan 2 '13 at 11:54
    
Using the command posted, I got it working on my aspire last time. sudo apt-get install linux-headers-'uname -r' –  Dr_Bunsen Jan 2 '13 at 12:42
1  
Try installing a more recent compat-wireless set of drivers as I described in this answer. Also, there seem to be tons of other people suffering from the same issue when searching for AR9285 on this site. Not sure which to flag as duplicate. Please try the compat-wireless approach, try sudo modprobe ath9k nohwcrypt=1 if it doesn't work and report back. –  gertvdijk Jan 2 '13 at 12:43
    
@gertvdijk - you should post that as an answer. –  Martin Owens -doctormo- Jan 2 '13 at 13:12
1  
@MartinOwens-doctormo- I've decided to write a very general Q&A on this. askubuntu.com/questions/235279/… –  gertvdijk Jan 2 '13 at 20:10
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