The problem is caused by the fact that, while you're on Ubuntu 10.04, you appear to be running an older kernel (2.6.31-20-generic), for which the header files are not installed. You could install the headers (package linux-headers-2.6.31-20-generic). However the best thing to do would be to use the latest kernel provided by your release: 2.6.32
I'm marking this as invalid. If the advise above did NOT solve your problem, please feel free to switch the status back to new and provide additional information. Thank you, and good luck ** Changed in: dahdi-linux (Ubuntu) Status: New => Invalid -- package dahdi-dkms 1:2.2.1 dfsg-1ubuntu2 failed to install/upgrade: dahdi kernel module failed to build https://bugs.launchpad.net/bugs/582807 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs