Comment 12 for bug 1648292

Even if we don't have the kernel support in place yet I think Mir could still do better.

What the user sees is:
Unknown command line options: --vt 1

What that means is:
A non-mesa-kms graphics driver was chosen (or none at all? can't tell). And that's not even a bug at all if some working driver has been found. It's presently a bug in the snap to pass a driver-specific option (--vt), but I would also argue that should not be true and the snap should be allowed to (along with LightDM). VT support should be generally available and not buried in just one graphics driver. Then the above error will never happen again (we've been hitting it for years now).