Comment 11 for bug 1575437

For what it's worth, the 4.6.0 kernel from <http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety/> appears to work perfectly in conjunction with the "nouveau.modeset=0" boot parameter. I haven't encountered any bootup hangs with this combination, no issues with the fan, nor any apparent loss of functionality. [NOTE: I have not re-tested any of the previous kernels with this parameter]

For the time being I've simply added the setting to /etc/default/grub (see below), followed by running "sudo update-grub".

$ grep nouveau /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="nouveau.modeset=0 quiet splash"

I'll let you know if any side effects arise, but I've rebooted about 6-8 times so far and everything appears to be rock solid. :)