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I'm using ubuntu 12.04 with Nvdia GE-F card (happily working and installed using these instructions). Since the last kernel update (3.2.0-38-generic) i can only boot in 2D mode (otherwise it just freezes moments after i log in).

Is there a way to un-roll an update? I need my machine....

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up vote 1 down vote accepted

From grub you should be able to choose to boot to previous versions. You will then have a list of choices with all the previous kernels.

I just followed these instructions to remove a kernel I didn't want.

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