How to enable software rendering via X server

[Roland Scheidegger]

If direct rendering fails, indirect will be used.
So if LIBGL_ALWAYS_INDIRECT isn't set and you still get indirect
rendering, this is probably what happens. Use LIBGL_DEBUG=verbose
glxinfo to figure out why.

Roland


Am 16.02.2011 06:17, schrieb Neeraj N T:
> 
> I unset LIBGL_ALWAYS_INDIRECT  and set only LIBGL_ALWAYS_SOFTWARE but
> the  output was still the same.
> 
> 
> Neeraj
> 
> Dan Nicholson wrote:
>> On Mon, Feb 14, 2011 at 11:15 PM, Neeraj N T <neerajnt at tataelxsi.co.in> <mailto:neerajnt at tataelxsi.co.in> wrote:
>>   
>>> I set LIBGL_ALWAYS_SOFTWARE=1.But the output I got was the same:
>>>
>>> direct rendering: No
>>> OpenGL renderer string: Mesa DRI Intel(R) IGDNG_M GEM 20091221 2009Q4
>>>     
>> This means you also have LIBGL_ALWAYS_INDIRECT set, which means the
>> server is creating the GLX context. I don't think you can easily
>> control which dri driver the server opens, but I might be wrong. So,
>> if you have LIBGL_ALWAYS_SOFTWARE set and LIBGL_ALWAYS_INDIRECT unset,
>> then you should get direct rendering with the swrast.
>>
>> To review,
>>
>> LIBGL_ALWAYS_INDIRECT: use the X server's GLX context. This used to
>> mean you'd also get software rendering, but with AIGLX you'll probably
>> get the hardware DRI driver.
>>
>> LIBGL_ALWAYS_SOFTWARE: tell libGL to use the software renderer. This
>> only works with direct rendering because otherwise you're getting the
>> DRI driver that the X server opened, and it's not controlled by this
>> variable.
>>
>> --
>> Dan
>>
>>   
> 
> 
> 
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