Andreas - I think the file you are looking for is in the bug description:
DKMSBuildLog: DKMS make.log for dahdi-2.2.1+dfsg-1ubuntu3 for kernel 2.6.35-30-generic (i686) Sun Jul 17 20:17:19 EDT 2011 make: *** /.config: Is a directory. Stop.
Andreas - I think the file you are looking for is in the bug description:
DKMSBuildLog: 2.1+dfsg- 1ubuntu3 for kernel 2.6.35-30-generic (i686)
DKMS make.log for dahdi-2.
Sun Jul 17 20:17:19 EDT 2011
make: *** /.config: Is a directory. Stop.