Lenovo G580 Brightness Error caused by unsupported updates. How to revert?

Posted by Arjun Bajaj on Ask Ubuntu See other posts from Ask Ubuntu or by Arjun Bajaj
Published on 2012-09-11T20:25:12Z Indexed on 2012/09/11 21:49 UTC
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Filed under:

12.04

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64-bit

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brightness

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lenovo

I just installed the 64-Bit version of Ubuntu 12.04 on my newly bought Lenovo G580.

The brightness control was working properly using the Live CD and when I first started the installed version.

Then I updated Ubuntu and restarted my laptop, and suddenly now, I can't change the brightness.

I think its caused by some update. And then I went and checked my update settings, and saw that Unsupported Updates were enabled by default. So now I need to fix this brightness issue somehow.

What should I do to locate the wrong update and remove it?

I don't even mind removing all the updates right now.

Thanks for the help. :)

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