Comment 16 for bug 797568

Wow, thanks for the effort!
I didn't know about the "ACPIDebuggingAMLwithSystemTap" page, otherwise I would have pointed you to than - anyway, something good to know :)
With the additional information, I can mark this bug as duplicate, this should have been fixed with Lazarus 0.9.30 (a dependency of easyMp3Gain which provides a widgetset abstraction layer, the LCL).
This is also related to http://bugs.freepascal.org/view.php?id=16439
If you need packages for easyMp3Gain, I can provide some - fixing this in Natty will not be possible unfortunately, due to Ubuntu's policy. (I would have to add a new version of an application to a frozen repository - unfortunately, a fix for this error is not that trivial so that it could be fixed without a new-version-upload.)