Created attachment 84349 [details] normal bootlog ./piglit-run.py -t '/shaders/glsl-fs-texture2d-dependent-4' tests/quick.tests results/quick-shaders-single-test.tests passes or fails seemingly random 20 passes - 9 fails Result of fail: Probe color at (25,224) Expected: 0.000000 0.000000 1.000000 Observed: 1.000000 0.000000 0.000000 Probe color at (224,224) Expected: 1.000000 1.000000 1.000000 Observed: 0.000000 1.000000 0.000000 Hardware: Nvidia 8200 Onboard NVAA/NV50 nouveau [ DEVICE][0000:02:00.0] Chipset: MCP77/MCP78 (NVAA) nouveau [ DEVICE][0000:02:00.0] Family : NV50 Software: Linux Mint 15 + xorg-edgers + 3.11-rc5 Kernel: 3.11.0-rc5-vanillaice (compiled) libdrm-nouveau: 2.4.46+git20130702.c6d73cfe-0ubuntu0sarvatt~raring xserver-xorg-video-nouveau : 1:1.0.9+git20130730.300c5a32-0ubuntu0sarvatt~raring mesa: 9.2.0~git20130729+9.2.9b8ad643-0ubuntu0sarvatt~raring
As a datapoint, I also got it to fail on NV96, similar failure. However for me it was more like 1/100 times. And I never saw the failure with mesa 9.1.2, only mesa-git (from a few days ago). This is how I ran it: for i in `seq 100`; do bin/shader_runner tests/shaders/glsl-fs-texture2d-dependent-4.shader_test -auto; done Here was the failure: Probe color at (25,225) Expected: 0.000000 0.000000 1.000000 Observed: 1.000000 0.000000 0.000000 Probe color at (225,225) Expected: 1.000000 1.000000 1.000000 Observed: 0.000000 1.000000 0.000000 Note how for me it says ,225 and not ,224. Might be a different piglit test version... I'm at latest. (Or could be a difference between nv84 3d and nva0 3d.) This feels like a timing issue -- e.g. we return too early without having flushed something.
Hmmm... I just went and retested this with latest mesa, and I can't get it to fail on NV98. There have been a few patches that went in that may affect this type of issue. Could you verify that this still happens with mesa-git?
It will take a while to set up because several other things are not working with NVAA too and temporary "removal" of the driver in 3.13-rc1 - 3.13-rc3 is not helping either see (similar?) NVAA / NVAC: https://bugs.freedesktop.org/show_bug.cgi?id=72399 and on the mailing list: http://lists.freedesktop.org/archives/dri-devel/2013-December/050037.html building with Ubuntu wasnt as nice ... now trying to set up with Fedora
This could be tested with 3.12 just fine. The commits I was referencing were to mesa. The important part would be to have a fresh mesa git checkout. (And use it to run the tests :) )
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