Is there any way to downgrade or revert an update to the kernel?

Posted by David on Ask Ubuntu See other posts from Ask Ubuntu or by David
Published on 2013-04-29T18:44:00Z Indexed on 2013/10/20 22:12 UTC
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kernel

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13.04

Today I installed the linux 3.9 Kernel update (because I heard it would fix sound through HDMI which I no longer have since installing 13.04). After restarted my computer and logging in my screen has only a desktop, and no dock or tool bar.

I tried to reset unity and compiz using guides like this one but nothing happens, even after reboot.

Is there any way to downgrade or reset the update?

EDIT: Running uname -a in terminal brings up 3.8.0 as my current kernel for some reason.

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