Bug#628680: sludge-engine: Nothing is displayed (black screen) with antialias=1

[Tobias Hansen]

I'm attaching another mail from Rogier. (Please keep attaching to the 
bug report.):

Am 30.07.2011 17:52, schrieb Rogier:
> Hi Tobias,
>
>> Actually it would be quite good to know, because then we could reassign
>> the bug to the driver package. Which driver are you using now?
> I've been away a few weeks, and busy with other things, but I finally got
> around to trying out-of-order with other drivers.
>
> The driver I am using is the xorg radeon driver.
> I don't know if it's relevant, but fglxrinfo prints the following:
>      display: :0  screen: 0
>      OpenGL vendor string: X.Org R300 Project
>      OpenGL renderer string: Gallium 0.4 on ATI RS690
>      OpenGL version string: 2.1 Mesa 7.10.3
>
> The radeonhd driver is not available on my system (debian testing)
>
> I tested with the fbdev driver, and it works fine with and without AA, except
> that sludge-engine consumes>  80% CPU, and the game is extremely slow.
> fglrxinfo output:
>      display: :1  screen: 0
>      OpenGL vendor string: Mesa Project
>      OpenGL renderer string: Software Rasterizer
>      OpenGL version string: 2.1 Mesa 7.10.3
>
> I tried to install the fglrx driver, but apparently my card is not supported.
>
> If you need more information, let me know.
>
> Kind regards,
>
> Rogier

Hi Rogier,

thanks for having another look at this. I have searched the web a bit on 
how well the RS690 is supported by the drivers and found out that it 
seems to belong to the latest graphics cards without support for vertex 
shaders that were sold. sludge-engine uses shaders, so any way you can 
make it work involves shader code being processed on the cpu and thus 
slowness.

Here is the table stating that the ship doesn't support shaders:
http://xorg.freedesktop.org/wiki/RadeonFeature

Best regards,
Tobias