Bug 110608

Summary:	[bisected][18.3.3 regression] Nouveau on Wayland fails
Product:	Mesa	Reporter:	Marius Bakke <mbakke>
Component:	glsl-compiler	Assignee:	mesa-dev
Status:	RESOLVED INVALID	QA Contact:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity:	normal
Priority:	medium
Version:	18.3
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Marius Bakke 2019-05-04 15:49:07 UTC

Greetings,

After updating from Mesa 18.3.1 to 18.3.5, swaywm no longer starts on my nouveau Nvidia GTX 770.

Sway prints the following error:

sway: ../mesa-18.3.5/src/mesa/program/prog_parameter.c:247: _mesa_add_parameter: Assertion `0 < size && size <=4' failed.

I bisected it down to this commit:
https://gitlab.freedesktop.org/mesa/mesa/commit/fb78a6cb72270de271f75d6f6c9b5ebadba7a898

However, reverting that on top of my distro-provided Mesa 18.3.5 still yields the same error.

Mesa 19.0.3 fails with a different message:

sway: ../mesa-19.0.3/src/compiler/glsl/serialize.cpp:555: void read_uniforms(blob_reader*, gl_shader_program*): Assertion `vec_size + prog->data->UniformStorage[i].storage <= data + prog->data->NumUniformDataSlots' failed.

Please let me know what other details I can provide.  Thanks in advance!

This is possibly a duplicate of #109812.

Comment 1 Ilia Mirkin 2019-05-04 16:08:05 UTC

This feels like a mesa cache format issue. For whatever reason, mesa's internal mechanisms don't detect that it should invalidate the shader cache.

Try to wipe your $HOME/.cache/mesa_shader_cache directory, and see if the situation improves.

Comment 2 Marius Bakke 2019-05-04 16:50:22 UTC

Derp.  I can confirm that wiping $HOME/.cache/mesa_shader_cache fixes the issue.

Closing this bug, thanks for the quick response!

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