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@@ -0,0 +1,73 @@
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+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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+From: Kai Ninomiya <[email protected]>
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+Date: Thu, 11 Feb 2021 02:24:04 +0000
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+Subject: Disable GPU acceleration on all Mesa software rasterizers
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+
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+The previous entry only disabled acceleration on swrast, but softpipe
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+and llvmpipe shouldn't be used for "GPU" acceleration either.
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+This should apply to Linux but not ChromeOS, AFAICT.
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+
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+This only improves an existing software rendering list entry, but here
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+is the rationale: We prefer to rely on our own (domain specific, so more
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+efficient) software paths, at least for everything other than WebGL. And
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+for WebGL, SwiftShader avoids unknown factors like
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+llvmpipe/softpipe/swrast.
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+
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+If you are running a Mesa GL driver (not e.g. NVIDIA) then you can force
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+these configurations with:
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+- LIBGL_ALWAYS_SOFTWARE=1
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+ https://docs.mesa3d.org/envvars.html#libgl-environment-variables:~:text=LIBGL_ALWAYS_SOFTWARE
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+- GALLIUM_DRIVER=llvmpipe, softpipe, or swr (though swr didn't work for me)
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+ https://docs.mesa3d.org/envvars.html#gallium-environment-variables:~:text=GALLIUM_DRIVER
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+
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+The GL_RENDERER strings are:
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+- swrast: "Software Rasterizer" (couldn't test this locally; found this online)
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+- softpipe: "softpipe" (on one machine)
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+- llvmpipe: "llvmpipe (LLVM 10.0.0, 256 bits)" (on one machine)
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+
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+Drive-by updates the description of another item to be more accurate
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+(SVGA3D is virtualized over hardware; it's not a software renderer).
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+
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+# Unrelated CQ failures on branch
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+(cherry picked from commit 7c7eccfc85e387a0dcd154a2a9c2389177982837)
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+
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+No-Try: True
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+Bug: 1155974
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+Change-Id: I0571c1a1bf526260f7ea6cd53f88eec768973b13
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+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2645491
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+Commit-Queue: Kai Ninomiya <[email protected]>
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+Reviewed-by: Zhenyao Mo <[email protected]>
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+Auto-Submit: Kai Ninomiya <[email protected]>
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+Cr-Original-Commit-Position: refs/heads/master@{#846422}
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+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2651183
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+Reviewed-by: Kenneth Russell <[email protected]>
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+Cr-Commit-Position: refs/branch-heads/4324@{#2176}
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+Cr-Branched-From: c73b5a651d37a6c4d0b8e3262cc4015a5579c6c8-refs/heads/master@{#827102}
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+
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+diff --git a/gpu/config/software_rendering_list.json b/gpu/config/software_rendering_list.json
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+index 68bed9e49ddf349871ea480c8c51fc1fbca579d3..2454f23160b194f8262409b6029e0396e739a928 100644
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+--- a/gpu/config/software_rendering_list.json
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++++ b/gpu/config/software_rendering_list.json
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+@@ -21,11 +21,11 @@
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+ {
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+ "id": 3,
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+ "description": "GL driver is software rendered. GPU acceleration is disabled",
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+- "cr_bugs": [59302, 315217],
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++ "cr_bugs": [59302, 315217, 1155974],
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+ "os": {
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+ "type": "linux"
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+ },
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+- "gl_renderer": "(?i).*software.*",
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++ "gl_renderer": "(?i).*(software|llvmpipe|softpipe).*",
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+ "features": [
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+ "all"
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+ ]
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+@@ -353,7 +353,7 @@
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+ },
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+ {
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+ "id": 50,
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+- "description": "Disable VMware software renderer on older Mesa",
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++ "description": "Disable VMware virtualized renderer on older Mesa",
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+ "cr_bugs": [145531, 332596, 571899, 629434],
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+ "os": {
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+ "type": "linux"
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Robo