I also had this error on ASUS Z87-Pro motherboard when upgrading 14.10 to 15.04. Unity was unable to login using any kernel. Using a liveusb I downloaded the lastest NVIDIA driver for my EVGA GeForce 960 GTX from NVIDIA. I installed it from a root shell and I was able to log in after restart.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1430625 Title: ACPI PCC probe failed. To manage notifications about this bug go to: https://bugs.launchpad.net/hundredpapercuts/+bug/1430625/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
