BTW, a handy-dandy GUI-based tool to have installed to test different kernels is the GRUB-CUSTOMIZER package. Please DO NOT uninstall the "stock" 4.4.x kernel, you may to fall-back to it if the upstream kernel doesn't work.
https://launchpad.net/~danielrichter2007/+archive/ubuntu/grub-customizer -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1559308 Title: Plugging HDMI screen in causes system hang To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1559308/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs