Was there a precise kernel version where you were not having this particular problem? This will help determine if the problem you are seeing is the result of the introduction of a regression, and when this regression was introduced.
You report you can install Oneiric, so maybe you can boot some Precise kernels on Oneiric to try and find what version introduced the regression.
Was there a precise kernel version where you were not having this particular problem? This will help determine if the problem you are seeing is the result of the introduction of a regression, and when this regression was introduced.
You report you can install Oneiric, so maybe you can boot some Precise kernels on Oneiric to try and find what version introduced the regression.