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I decide to downgrade kernel version due to unsolvable problem with wifi. Ubuntu version is 12.10, kernel version is 3.5.

In http://packages.ubuntu.com/precise/kernel/ I found the previous kernel version 3.2. I decided to install linux-image-3.2.0-51-generic. The question is it enough to install just linux-image package, do I need to install linux-header package too, are there more package I should install?

The second question, as it suggested on the website, the right way to install the packages is to edit the file /etc/apt/sources.list insert the line deb http://security.ubuntu.com/ubuntu precise-security main. However after inserting and running the update I still cannot find packages of linux-image 3.2 by apt-cache search linux-images*. Where I am wrong?

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possible duplicate of How to downgrade the Kernel on 11.10 –  amc Aug 12 '13 at 6:27
    
@amc, thank you for the comment, the main question what the image-header package for, and should I install it? And how to make the downgrade from repository? I don't find answers on these question in the question your mentioned. –  user10756 Aug 12 '13 at 8:03
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up vote 5 down vote accepted

I still cannot find packages of linux-image 3.2 by apt-cache search linux-images*. Where I am wrong?

On spelling. The correct command is

apt-cache policy linux-image-*

Also, the Tab Completion feature is very handy and you should learn to use it. Open a terminal and write

 sudo apt-get install linux-image- 

Then hit Tab key twice and read the list, can you see 3.2 kernel ?

do I need to install linux-header package too, are there more package I should install?

Every linux-image has its own linux-headers version, so it is preferable to install them too.

sudo apt-get install linux-headers- 

and use the same Tab Completion feature (as in linux-image- above) to locate the appropriate ones.

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great, thank you very much! –  user10756 Aug 12 '13 at 8:33
    
@guntbert, with pleasure, however I don't have enough reputation, therefore meanwhile "thank you!" :) –  user10756 Aug 12 '13 at 11:29
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