I was able to come up with workaround of sorts. After doing some research, I figured out how to manually unload the radeon module, and created an script to do that (attached) which I placed in init.d and, after running update-rc.d, I got to work... sort of. Apparently it only works properly when I am in single-user (recovery) mode (it did not work here before though). The problem is that in normal mode it apparently uses upstart for everything, and I haven't been able to find out how to run the script properly via upstart.
** Attachment added: "script to manually unload radeon module" http://launchpadlibrarian.net/45460746/uloadradeon -- [RS780 KMS] no poweroff on halt with KMS enabled https://bugs.launchpad.net/bugs/569271 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
