Created attachment 143631 [details]
Xorg log

Running any OpenGL application on X running using DRM lease will result in fallback to swrast.
But the modesseting driver is able to use radeonsi for glamor.

LIBGL_DEBUG=verbose glxinfo | grep OpenGL
libGL: screen 0 does not appear to be DRI3 capable
libGL error: failed to authenticate magic 10
libGL error: failed to load driver: radeonsi
libGL: MESA-LOADER: dlopen(/usr/lib64/dri/swrast_dri.so)
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /etc/drirc: No such file or directory.
OpenGL vendor string: VMware, Inc.
OpenGL renderer string: llvmpipe (LLVM 7.0, 128 bits)
OpenGL core profile version string: 3.3 (Core Profile) Mesa 19.1.0-devel (git-9ab1b1d022)
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.1 Mesa 19.1.0-devel (git-9ab1b1d022)
OpenGL shading language version string: 1.40
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.0 Mesa 19.1.0-devel (git-9ab1b1d022)
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00
OpenGL ES profile extensions:

Xorg 1.20.4
libdrm 2.4.97
Mesa 19.1.0-devel (git-9ab1b1d022)
kernel 5.0.0-gentoo