Nouveau driver blocks boot (17.04) on Optimus laptop with 960m

[tdotreppe]

Nouveau prevents booting on Optimus laptops (happened in recent kernels, on other distro, the issue wasn't present as of 4.4).

Here is a transcript of the error:
nouveau 000:02:00.0: bus MMIO 00000000 FAULT at 022554
nouveau 000:02:00.0: priv: HUB0: 10ecc0 ffffffff 1e40822c

Then a bunch of NMI watchdog soft lockup messages (of the different CPU stuck for 22s) and a message to echo something to hung_task_timeout_secs.

Trying to use nomodeset, it takes forever to "boot", I see errors during boot and when trying to load X.

Errors on the boot screen:
- tpm_crb MSFT0101:00: can't request region for resource [mem 0xfed40080-0xfed40fff]
- systemd[1]: Failed to register Manager vtable: File exists
- systemd[1]: Failed to set-up API bus: File exists
- systemd[1]: Failed to register Manager vtable: File exists
- systemd[1]: Failed to set-up API bus: File exists

Yes, the systemd errors are present twice

Error on X start (and keyboard/mouse is unusable (mouse isn't even displayed), I get a pop-up asking to adjust settings or something like that that shows for a second or 2.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1698042/+editstatus and add the package name in the text box next to the word Package.

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[tdotreppe (tdotreppe)]

1. I assume the module nouveau is part of the kernel
2. I selected the kernel as close as possible to the current version; I don't know exactly which one it is since it doesn't boot.
3. Behavior described is what happens on 16.04.2 and 17.04