Bug#956665: libdrm2: Update broke firefox WebGL

[Timo Aaltonen <tjaalton@debian.org>]

On 14.4.2020 8.03, Fabian Inostroza wrote:
> Package: libdrm2
> Version: 2.4.101-1
> Severity: normal
> 
> Dear Maintainer,
> 
> After updating libdrm2 from 2.4.100-4 to 2.4.101-1 WebGL stopped working on
> firefox (using esr from repos and tar from mozilla).
> 
> After loading a WebGL sample from webglsamples.org the following is message is
> shown in the web console:
> Error: WebGL warning: <SetDimensions>: Failed to create WebGL context: WebGL creation failed: 
> * tryNativeGL
> * Exhausted GL driver options.
> 
> and in the terminal where firefox was launched:
> libGL error: MESA-LOADER: failed to retrieve device information
> libGL error: Version 4 or later of flush extension not found
> libGL error: failed to load driver: i915
> libGL error: MESA-LOADER: failed to retrieve device information

Probably the same as this upstream bug

https://gitlab.freedesktop.org/mesa/drm/-/issues/39

could you test this patch if it helps:

https://716574.bugs.gentoo.org/attachment.cgi?id=632372


-- 
t