Re: [Linux-fbdev-users] i865G framebuffer

[Antonino A. D. <ad...@ho...>]

On Monday 30 August 2004 03:01, - wrote:
> I am using i865G and 2.6 kernel series and I would like to use pivot. (Use
> my monitor in portrait.) It seems the options available are quite thin for
> me:
>
> - Xrandr rotation doesn't generally work on Linux platform
> - i810fb doesn't recognize my i865G
> - intelfb hasn't been ported to 2.6 series
> - Intel's version of the driver doesn't support rotation
> - VesaFB. Works.
>
> VesaFB works alright as long as I don't rotate the view. When I rotate the
> performance turns (understandably) completely horrible. 1280x1024x16
> rotated CCW is extremely slow and practically not usable at all.
>
> Is there or will there be any sorts of development that will remedy the
> situation?

I don't have hardware for i830 chipsets and above.  I did made an initial port of
intelfb for 2.6.  

Note that display rotation will require some kind of hardware support in order to
have optimal performance.  This means that even if intelfb is ported to 2.6, the
performance you'll get will not be significantly faster than if you use vesafb.

Basically, you need the Xorg/XFree86 to support rotation for i865.

Anyway, if you are interested, I'm attaching the patch which ports intelfb to 2.6.
It is completely untested, and console acceleration is not included.

Tony