We can do better. 0 is a reasonable default for when a kms driver is
attached, but will usually fail in other cases. I've commited the
following change:
http://mail-index.netbsd.org/source-changes/2016/09/21/msg077860.html
Now the defaults work like this:
If KMS driver is attached, =0
If non-KMS driver is attached and VGA_POST option is present, =2
If non-KMS driver is attached and VGA_POST option is absent, =1
Cheers,
Jared