Petr: the fix hasn't landed yet, so it can't be a regression. The log shows that the nvidia kernel module is not available. Maybe you installed a new kernel (through an update) and you are now missing the relevant kernel headers. The solution is to install the said headers.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1296020 Title: [Asus U36JC] Non-existent display detected in both intel driver and nvidia driver (Optimus Laptop) (ubuntu trusty 14.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1296020/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs