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

[Rogier]

Hi Tobias,

Thanks for your reply.

On 2011-05-31 08:27, Tobias Hansen <tobias.han at gmx.de> wrote:
> Am 31.05.2011 11:49, schrieb Rogier:
> > Unknown opcode DDY
> 
> Looks like this one:
> http://lists.freedesktop.org/archives/dri-devel/2010-August/002805.html
It seems like it.

> There the answer is that the hardware doesn't support something.
Wouldn't that be 'mesa doesn't support something' ? (something that would be 
in hardware, if only I had a better graphics card ?)

In that case, I would expect either mesa to return a failure somewhere, and 
then sludge to fail or maybe even to take corrective action (if possible at 
all), or mesa (knowing it can't support DDY) to do something that at least 
preserves the output.

> What graphics card do you have?
ATI Technologies Inc RS690M [Radeon X1200 Series]

> Is everything displayed correctly when disabling antialiasing?
Yes.
And it is also when using linear interpolation (-a-1).
Just using antialiasing (-a1) it doesn't work.

> The log you posted was with antialiasing
> disabled, would you send one with enabled antialiasing
Hmmm...
The command-line has a '-a 0' indeed, but the log _does_ include the 'DDY' 
message, as well as 'Built shader program: 3 (smartScaler)', which puzzles me, 
as they are unique to antialiasing...
I suspect, I made a typo while sanitizing the /usr/bin/script log file.

I created a new log with antialiasing, and except for the first line, it is 
identical to the one I included in the report. It seems redundant to include 
it here ...

Regards,

Rogier.