As far as I can tell, this isn't a regression because it *didn't* work under 10.10 and isn't expected to work until the nvidia drivers support XRandR 1.2.
As for why it won't be fixed: it won't be fixed because we can't (reasonably) fix it. We don't have the source code for the binary drivers, so we can't (reasonably) fix bugs in them. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/737349 Title: Failed to detect second monitor (no XRandR 1.2 support) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs