Flakey WebGL tests on NVIDIA GeForce 9800 GTX/9800 GTX+

GoogleCodeExporter commented 9 years ago

1. Launch Chrome (version 39.0.2171.95 definitely works)
2. Run 'conformance/textures/texture-size-cube-maps.html' or 
'conformance/textures/texture-size.html'
3. Repeatedly run the tests by pressing the 'run' button

Expected results: consistent pass/fail rates
Actual results: varying pass/fail rates for each run. After pressing 'run' 10 
times, I get these number of passes (out of 362): 327, 273, 291, 256, 327, 344, 
292, 273, 291, 362

Chrome Version 39.0.2171.95

It doesn't repro on WARP Feature Level 11_0.
Note: this card is Feature Level 10_0, Shader Model 4.0

Original issue reported on code.google.com by aukin...@microsoft.com on 16 Dec 2014 at 11:20

GoogleCodeExporter commented 9 years ago

Just swapped to an AMD FirePro V3900 (ATI FireGL) Direct3D11 vs_5_0 ps_5_0 card 
in the same machine, and the issue doesn't repro, so it looks like it's related 
to this graphics card.

Original comment by aukin...@microsoft.com on 16 Dec 2014 at 11:27

GoogleCodeExporter commented 9 years ago

Verified reproable with NV8800, at least as far back as farback as Chrome 
38.0.2125.111 (I haven't updated on this machine in a while).

Also repros with Canary (41.0.2251.0), with either shipping DLLs or ToT ANGLE 
dropped in. Does *not* repro with the last point in the tree I had checked out 
and built, which was bd7fd7f9058d9e165e7b8faec423fa0cc2f441a5. There's a 
starting point for a bisect.

Original comment by shannonw...@chromium.org on 17 Dec 2014 at 9:52

KalebDark / angleproject

Flakey WebGL tests on NVIDIA GeForce 9800 GTX/9800 GTX+ #853