[Mesa-dev] [PATCH 00/37] Geometry shader support in Sandy Bridge

[Matt Turner]

On Wed, Aug 20, 2014 at 4:49 PM, Mike Lothian <mike at fireburn.co.uk> wrote:
> On 21 August 2014 00:41, Matt Turner <mattst88 at gmail.com> wrote:
>> On Wed, Aug 20, 2014 at 4:30 PM, Mike Lothian <mike at fireburn.co.uk> wrote:
>>> Hi I tested the branch - glxinfo reports GL 3.2 and GLSL 1.50 however
>>> when I run Heaven 4 I get a blank screen when rendering and the
>>> following messages:
>>>
>>> GLFrameBuffer::enable(): incomplete attachment
>>> GLFrameBuffer::enable(): incomplete attachment
>>> GLFrameBuffer::enable(): incomplete attachment
>>> GLFrameBuffer::enable(): incomplete attachment
>>> OpenGL error: invalid framebuffer operation
>>>
>>> This only happens when at 8xAA - is the demo mis detecting the AA
>>> abilities of Sandybridge?
>>
>> Sounds like it. Sandybridge can only do 4x MSAA.

glxinfo -l | grep GL_MAX_SAMPLES

will tell you.