bug#40538: installer: Support uvesafb to install on machines without KMS.

[Mathieu Othacehe]

Hello Florian,

> Please try adding nomodeset to the kernel parameters.  I hope this
> makes the Intel machine work fine.

Yes it works fine with nomodeset! Do you think we can do something about
it, besides adding a few lines in the documentation to warn that old
hardware may require this option?

Thanks,

Mathieu