Yes, I have sources installed for all kernels. I used eselect kernel to change the symlink to 2.6.29 ... It was set to 2.6.31 before. In version 4.2, I got a successful compile of the acx module in the 2.6.29 kernel, using an ebuild that is no longer in the repository. I have not yet had a successful compile of the acx module in 2.6.31 kernel. So, in order to use wireless, I need to use the 2.6.29 kernel (until someone tells me how to use acx module in 2.6.31).