I'm running the latest amd64 snapshot (kernel #619) on a system with a
Radeon RX 550 (Polaris) GPU. glxgears and glxinfo show that OpenGL is
working and Xorg.0.log shows no errors.

When I try to enable OpenGL in Firefox by setting
layers.acceleration.force-enable to true, I see the following errors on
the terminal and https://get.webgl.org reports that WebGL is disabled or
unavailable.

libGL error: MESA-LOADER: failed to open radeonsi (search paths
/usr/X11R6/lib/modules/dri)
libGL error: failed to load driver: radeonsi
libGL error: MESA-LOADER: failed to open swrast (search paths
/usr/X11R6/lib/modules/dri)
libGL error: failed to load driver: swrast
libGL error: MESA-LOADER: failed to open radeonsi (search paths
/usr/X11R6/lib/modules/dri)
libGL error: failed to load driver: radeonsi
libGL error: MESA-LOADER: failed to open swrast (search paths
/usr/X11R6/lib/modules/dri)
libGL error: failed to load driver: swrast

And:

Crash Annotation GraphicsCriticalError: |[G0][GFX1-]: [OPENGL] Failed to
init compositor with reason: FEATURE_FAILURE_OPENGL_CREATE_CONTEXT
(t=0.34852) [GFX1-]: [OPENGL] Failed to init compositor with reason:
FEATURE_FAILURE_OPENGL_CREATE_CONTEXT
Crash Annotation GraphicsCriticalError: |[G0][GFX1-]: [OPENGL] Failed to
init compositor with reason: FEATURE_FAILURE_OPENGL_CREATE_CONTEXT
(t=0.34852) |[G1][GFX1-]: [OPENGL] Failed to init compositor with reason:
FEATURE_FAILURE_OPENGL_CREATE_CONTEXT (t=0.802629) [GFX1-]: [OPENGL]
Failed to init compositor with reason:
FEATURE_FAILURE_OPENGL_CREATE_CONTEXT
Crash Annotation GraphicsCriticalError: |[G0][GFX1-]: [OPENGL] Failed to
init compositor with reason: FEATURE_FAILURE_OPENGL_CREATE_CONTEXT
(t=0.34852) |[G1][GFX1-]: [OPENGL] Failed to init compositor with reason:
FEATURE_FAILURE_OPENGL_CREATE_CONTEXT (t=0.802629) |[G2][GFX1-]: [OPENGL]
Failed to init compositor with reason:
FEATURE_FAILURE_OPENGL_CREATE_CONTEXT (t=1.3604) [GFX1-]: [OPENGL] Failed
to init compositor with reason: FEATURE_FAILURE_OPENGL_CREATE_CONTEXT

Is this already known to be broken, or should I file a full bug report?

Thanks,

-- 

Joe Gidi
j...@entropicblur.com

"You cannot buy skill." -- Ross Seyfried

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