Comment 68 for bug 146859

I think this is a hardware limitation, except for I965 which has 8192x8192
MAX TEXTURE SIZE

To enable this, you need to patch Mesa DRI driver according to instruction
found in this blog:
http://soundmonster.wordpress.com/2009/02/17/dual-head-with-compiz-and-i965-on-ubuntu-intrepid/

On Wed, May 6, 2009 at 6:37 AM, aporter <email address hidden> wrote:

> Hi,
>
> This Intel DRI limitation, whether it be hardware or driver, still
> exists in Jaunty and Karmic.
>
> When I put two 1280x1024 monitors side-by-side, I see:
> (EE) intel(0): Cannot support DRI with frame buffer width > 2048.
> and glxinfo says software rendering
> When I put them one-above-the-other, I get full 2d hardware rendering and
> glxinfo says Mesa DRI Intel.
>
> My only question is this: If this is a hardware limitation, with the
> Intel chipset, why isn't this also a limitation in WinXP? Am I
> misunderstanding something? OSX is mentioned above in the same vein,
> but the question wasn't really answered. One of the other duplicates to
> this bug mentioned the absence of the limitation in windows (Bug
> #360713).
>
> I've looked around on the web, and I think this limitation is possible
> to work around (
> http://lists.freedesktop.org/pipermail/xorg/2008-June/036151.html
> mentions two frame-buffers).
>
> Thanks.
>
> --
> No dri (and therefore no compiz) for virtual screen greater than 2048x2048
> https://bugs.launchpad.net/bugs/146859
> You received this bug notification because you are a direct subscriber
> of a duplicate bug.
>