[waffle] [Piglit] [ANNOUNCE] waffle-1.2.2

[Chad Versace]

On 11/28/2012 10:40 AM, Marek Olšák wrote:
> On Wed, Nov 28, 2012 at 7:26 PM, Chad Versace
> <chad.versace at linux.intel.com> wrote:
>> On 11/27/2012 07:47 PM, Marek Olšák wrote:
>>> HI Chad,
>>>
>>> FYI, the core GL support in the GLX backend of waffle and/or piglit
>>> seems to be broken. All piglit tests that specify the core GL version
>>> and are run on a driver which cannot create a core GL context (that is
>>> any open driver except i965), always fail. The tests report
>>> GLXBadFBConfig and just die. I think the piglit_init function isn't
>>> even reached.
>>>
>>> I don't use EGL.
>>>
>>> Marek
>>
>> Marek,
>>
>> I tried some experiments with i965 and older versions of Mesa in an
>> attempt to reproduce your problem, but I can't. In the two experiments
>> I tried below, the behavior was exactly as expected.
>>
>> * Test 1: Against i965 from mesa-7.11, which supports only GL 2.1 and no
>> GLX_ARB_create_context.
>>
>>> PIGLIT_DEBUG=1 PIGLIT_PLATFORM=glx ./gl-3.1-minmax
>> piglit: debug: waffle_config_choose failed due to WAFFLE_ERROR_UNSUPPORTED_ON_PLATFORM: GLX_ARB_create_context is required in order to request a GL version not equal to the default value 1.0
>> piglit: info: Failed to create GL 3.1 core context
>> Mesa: Initializing x86-64 optimizations
>> Test requires GL version 3.1
>> PIGLIT: {'result': 'skip' }
>>
>>
>> * Test 2: Against i965 from mesa-9.0.1, which supports GL 3.1 core, and an Xserver
>> without GLX_ARB_create_context.
>>
>>> PIGLIT_DEBUG=1 PIGLIT_PLATFORM=glx ./gl-3.1-minmax
>> piglit: debug: waffle_config_choose failed due to WAFFLE_ERROR_UNSUPPORTED_ON_PLATFORM: GLX_ARB_create_context is required in order to request a GL version not equal to the default value 1.0
>> piglit: info: Failed to create GL 3.1 core context
>> Test requires GL version 3.1
>> PIGLIT: {'result': 'skip' }
>>
>>
>> Please run, with PIGLIT_DEBUG=1, the piglit test that's causing you trouble
>> and send me the output. Hopefully that will be enough for me to identify
>> and fix the bug.
> 
> PIGLIT_DEBUG doesn't print anything. All I get is:
> 
> X Error of failed request:  GLXBadFBConfig
>   Major opcode of failed request:  154 (GLX)
>   Minor opcode of failed request:  34 ()
>   Serial number of failed request:  22
>   Current serial number in output stream:  20
> 
> I get the same error with gallium and classic swrast.
> 
> Marek

Even with swrast, I'm not getting GLXBadFBConfig.

> PIGLIT_DEBUG=1 PIGLIT_PLATFORM=glx LIBGL_ALWAYS_SOFTWARE=1 bin/gl-3.1-minmax 
piglit: debug: waffle_config_choose failed due to WAFFLE_ERROR_UNSUPPORTED_ON_PLATFORM: GLX_ARB_create_context is required in order to request a GL version not equal to the default value 1.0
piglit: info: Failed to create GL 3.1 core context
Test requires GL version 3.1
PIGLIT: {'result': 'skip' }


The GLX call that likely emits GLXBadFBConfig is the call to glXCreateNewContext
at glx_context.c:144 (lines relative to waffle-1.2.2). That call succeeds for me,
so I don't know why it's failing for you. The following information would help:

1. Break at glx_context.c:144.
2. Verify that the call to glXCreateNewContext there emits GLXBadFBConfig.
3. Give me the backtrace there.
4. In gdb, give me the output of `print *config`.
5. Give me the output of glxinfo.

If this thread gets much longer, we should probably open a bug at
https://bugs.freedesktop.org/enter_bug.cgi?product=piglit