> Device Drivers  --->
>   Graphics support --->
>     <*> Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
> --->
>         --- Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
>         [*]   Enable legacy fbdev support for your modesetting driver
> ...and also...
>     <*> Intel 8xx/9xx/G3x/G4x/HD Graphics
>     <*> DRM Support for bochs dispi vga interface (qemu stdvga)
>
>   Something has changed.  I did some minor tweaking, and rebuilt, which
> solved the timezonDo I need another magic setting somewhere else
> to enable the options it asks for?  I'm attaching the Xorg log (gzipped)
> in case it helps.
>

I just tried uninstalling xf86-video-vesa and xf86-video-fbdev to see if
they were required, and X still runs, so you can ignore those messages.

FWIW i'm kernel 4.7.2 with ~amd64 on a skylake i3.

You dont appear to have evdev setup;
     -> Device Drivers
         -> Input device support
            -> Generic input layer (needed for keyboard, mouse, ...)

and emerge xf86-input-evdev