I did some testing using different kernels: 3.19.0-26, no boot.
- ACPI PCC error on screen, disappears after a few seconds - Black screen, normal fan, no HDD activity - Ctrl+alt+del doesn't work 3.19.0-42 - ACPI PCC error on screen, disappears after a longer time - HDD works longer before stopping - Black screen, normal fan - Ctrl+alt+del doesn't work 4.2.0-22 - Blinking cursor - Fan on full speed, no HDD activity - Black screen - Ctrl + alt + del doesn't work -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1529381 Title: Updating 14.04.3 to latest updates renders system unbootable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-vivid/+bug/1529381/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
