[GLTeapot] doesn't render anything

[diver]

GLTeapot window stays black after hrev48356 with intel_extreme driver.

Display controller (VGA compatible controller, VGA controller) [3|0|0]

  vendor 8086: Intel Corporation

  device 0116: 2nd Generation Core Processor Family Integrated Graphics Controller

[kallisti5]

reassigning to PulkoMandy. Likely due to the recent vsync change. Odd that is shows up on intel_extreme but works for PulkoMandy. I haven't tested yet.

[pulkomandy]

Yes, it works here.

IIRC the intel_extreme driver has a timeout on the wait_for_retrace, so I'm not sure how this can happen even with a non-working driver.

I'll try to test on more machines here and see if I can reproduce.

[axeld]

Alternatively, we could either drop the demo, or remove the vsync again -- after all, it doesn't really do anything useful if it cannot even be used as a "see how fast I am" demo anymore :-)

[pulkomandy]

That's cheating. It exposes a bug in our vsync code, which we should fix :)

I don't really care about removing the demo, but the "how fast I am" doubles as a "see how I can use all your CPU power and make your machine heat up just to spin a teapot", which makes the demo not that great. With hardware acceleration it would be more acceptable, and even there, it makes no sense to render more frames than the hardware can display.

A tearing-free teapot at full frame rate, no matter what the system load is, however, makes a more interesting demo of the multitasking features and how the system stays reactive even under heavy load. This is how I use the teapot when demoing haiku, with some videos playing in the background and using the remaining CPU time.

[pulkomandy]

Fixed in hrev48845.