UserWarning Could not set vsync; unsupported extension

[GoogleCodeExporter]

What steps will reproduce the problem?
1. import pyglet
2. windows = pyglet.window.Window()

Paste in the traceback or error message:
C:\Python25\lib\site-packages\pyglet\window\win32\__init__.py:552: UserWarning: 
Could not set vsync; unsupported extension.
  warnings.warn('Could not set vsync; unsupported extension.')

pyglet 1.1 with Python 2.5: Paste in the output of `python -m pyglet.info`
Python
------------------------------------------------------------------------------
sys.version: 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit 
(Intel)]
sys.platform: win32
os.getcwd(): C:\p\python\rietveld\codereview

pyglet
------------------------------------------------------------------------------
pyglet.version: 1.1.4
pyglet.__file__: C:\Python25\lib\site-packages\pyglet\__init__.pyc
pyglet.options['debug_trace_depth'] = 1
pyglet.options['audio'] = ('directsound', 'openal', 'alsa', 'silent')
pyglet.options['xsync'] = True
pyglet.options['debug_trace_flush'] = True
pyglet.options['debug_win32'] = False
pyglet.options['debug_gl_trace'] = False
pyglet.options['debug_x11'] = False
pyglet.options['shadow_window'] = True
pyglet.options['debug_font'] = False
pyglet.options['debug_media'] = False
pyglet.options['debug_trace'] = False
pyglet.options['debug_lib'] = False
pyglet.options['graphics_vbo'] = True
pyglet.options['vsync'] = None
pyglet.options['debug_trace_args'] = False
pyglet.options['debug_gl'] = True
pyglet.options['debug_graphics_batch'] = False
pyglet.options['font'] = ('gdiplus', 'win32')
pyglet.options['debug_texture'] = False
pyglet.options['debug_gl_trace_args'] = False

pyglet.window
------------------------------------------------------------------------------
platform: <pyglet.window.win32.Win32Platform object at 0x02881290>
display: <pyglet.window.win32.Win32Display object at 0x02881270>
screens[0]: Win32Screen(x=0, y=0, width=1280, height=800)
config['double_buffer'] = True
config['stereo'] = False
config['buffer_size'] = 32
config['aux_buffers'] = 0
config['sample_buffers'] = 0
config['samples'] = 0
config['red_size'] = 8
config['green_size'] = 8
config['blue_size'] = 8
config['alpha_size'] = 0
config['depth_size'] = 32
config['stencil_size'] = 8
config['accum_red_size'] = 16
config['accum_green_size'] = 16
config['accum_blue_size'] = 16
config['accum_alpha_size'] = 0
context: Win32Context()

pyglet.gl.gl_info
------------------------------------------------------------------------------
gl_info.get_version(): 1.1.0
gl_info.get_vendor(): Microsoft Corporation
gl_info.get_renderer(): GDI Generic
gl_info.get_extensions():
   GL_EXT_bgra
   GL_EXT_paletted_texture
   GL_WIN_swap_hint

pyglet.gl.glu_info
------------------------------------------------------------------------------
glu_info.get_version(): 1.2.2.0 Microsoft Corporation
glu_info.get_extensions():
   GL_EXT_bgra

pyglet.gl.glx_info
------------------------------------------------------------------------------
GLX not available.

pyglet.media
------------------------------------------------------------------------------
driver: pyglet.media.drivers.directsound

pyglet.media.avbin
------------------------------------------------------------------------------
Library: <CDLL 'avbin', handle 6e440000 at 2a5f1f0>
AVbin version: 5
FFmpeg revision: 13661

pyglet.media.drivers.openal
------------------------------------------------------------------------------
OpenAL not available.

Original issue reported on code.google.com by techtonik@gmail.com on 8 Apr 2011 at 10:53

[GoogleCodeExporter]

The warning is displayed every time.

Original comment by techtonik@gmail.com on 8 Apr 2011 at 10:54

[GoogleCodeExporter]

I am having the same error, but only on one of my systems. All but the OS and 
hardware on my computers are identical. I use synchronization software to 
ensure this. I am running Pronterface from GitHub downloaded on 2014-01-12 with 
Python 2.7.3. All required Python packages were updated on 2014-01-10. Pyglet 
version is 1.1.4. No Python settings have been touched and the scripts 
directory has been added to the path.

On one working system I am running fully updated Windows 8.1 Pro with an nVidia 
card in a desktop system. I have also installed Microsoft Windows SDK.

On a second working system I am running Windows 8 Pro on a Lenovo X220T.

On the system that gets the error I am running Windows 8 Pro on a Lenovo X61T.

Let me know if you want any further information or you need me to do anything 
to get more info.

Original comment by Renae.Ma...@gmail.com on 20 Jan 2014 at 8:36