@Martin-Eric -- you had success with a vanilla v2.6.24 kernel, using a cut-down ubuntu configuration. Now that we have vanilla builds available for testing we can use those to try and identify the trigger for this regression.
The first logical test would be to try a v2.6.24 vanilla kernel with a full ubuntu config from the URL below:
If that works then it would be worth stepping through the v2.6.24.x mainline releases to see if any fail. Those can be found here:
If you could could test those and report back here that would help us identify the source of the regression. Thanks in advance.