Bug 98021

Summary:	Applications and games crash after opengl version overrides
Product:	Mesa	Reporter:	Stepan Bakshaev <step2back+freedesktop>
Component:	Drivers/Gallium/radeonsi	Assignee:	Default DRI bug account <dri-devel>
Status:	CLOSED INVALID	QA Contact:	Default DRI bug account <dri-devel>
Severity:	normal
Priority:	medium
Version:	git
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Stepan Bakshaev 2016-10-03 04:29:25 UTC

I should set mesa version to smooth play in alien isolation ( https://bugs.freedesktop.org/show_bug.cgi?id=93144#c35 ). I set "MESA_GL_VERSION_OVERRIDE=4.3 MESA_GLSL_VERSION_OVERRIDE=430". Appications and games start carsh in gl initialization. Some examples: steam, 0ad. glxgear shows black screen.

I use software from oibaf ppa:

Extended renderer info (GLX_MESA_query_renderer):
    Vendor: X.Org (0x1002)
    Device: AMD CAPE VERDE (DRM 2.43.0 / 4.4.0-41-generic, LLVM 3.9.0) (0x683d)
    Version: 12.1.0
    Accelerated: yes
    Video memory: 1024MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.3
    Max compat profile version: 4.3
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.0

MESA_DEBUG=1 prints

Mesa: User error: GL_INVALID_ENUM in glGetString(GL_EXTENSIONS)

I'm curious why mesa does not set 4.3 already. According mesamatrix (by features.txt) there are all extensions implemented for radeonsi.

Comment 1 Nicolai Hähnle 2016-10-04 14:50:17 UTC

Hi Stepan, it's called an override for a reason. When you enable it, you're operating outside of the supported parameters, and shouldn't be surprised when something crashes. Don't report a bug for something like that.

That said, radeonsi has supported OpenGL 4.3 for several months now. For SI-based cards like yours, you need a more recent kernel. The radeon module of older kernels lacks some of the functionality that is required for compute shaders.

Comment 2 Stepan Bakshaev 2016-10-05 06:24:01 UTC

I got it. linux 4.8 is enough for enable 4.3 in stock. Sorry for bother you. I check time by time https://www.x.org/wiki/RadeonFeature/. it does not mention about all requirements for opengl 4.3. There is only llmv 3.8 as requirements. I saw Alex Deucher updates that wiki page. May be he will add next time linux 4.8 in footnotes.

Thank you and whole team for pushing radeon driver forward!

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