Re: [gentoo-user] Re: kernel choices for booting gentoo as guest in vbox vm

[Alexander Kapshuk]

On Fri, Feb 2, 2018 at 6:32 AM, Harry Putnam <reader@×××××××.com> wrote:
> Alexander Kapshuk <alexander.kapshuk@×××××.com> writes:
>
> [...]
>
>>> Can anyone tell me what they used to allow gentoo in vbox to boot?
>>>
>>>
>>>
>> Did you enable the recommended kernel config options as suggested here [1]?
>> [1] https://wiki.gentoo.org/wiki/VirtualBox
>
> I did go thru that page and `think' I checked them off but I came to
> that URL kind of late in the game... It would have no doubt went
> better if I'd caught that earlier on.
>
> It does appear to share some confusion with a couple of other pages.
> I don't have them to hand but one said flatly not to use `any' of the
> first bunch of framebuffer settings (1st and 2nd is based on how they
> are arranged in `menuconfig') and to only use the second set (a few
> lines below).
>
> They were saying that the kernel frame buffering will absolutely
> not work if one employs any of the settings from the first bunch.
>
>

The Kernel modesetting section of the xorg guide,
https://wiki.gentoo.org/wiki/Xorg/Guide, recommends disabling most of
the drivers listed in the 'Support for frame buffer devices' section
of .config.
I could be wrong, but I believe that applies to installing the kernel
on real hardware specifically.

For emulated environments, such as virtualbox, the instructions given
in the wiki article for virtualbox take precedence.
Virtualbox uses GPU frame buffers and has routines that convert GPU
memory layouts to kernel ones and back, as far as I can tell.