В попытке решить проблему с запуском на ноуте дискретной карты nvidiа загрузил дрова (nvidia-xconfig не запускал) и увидел любопытную весчь:
DRI_PRIME=0 glxspheres
Polygons in scene: 62464 (61 spheres * 1024 polys/spheres)
Visual ID of window: 0xb2
Context is Direct
OpenGL Renderer: Mesa DRI Intel(R) HD Graphics 405 (Braswell)
60.525514 frames/sec - 55.613263 Mpixels/sec
59.938501 frames/sec - 55.073892 Mpixels/sec
60.045397 frames/sec - 55.172113 Mpixels/secDRI_PRIME=1 glxspheres
Polygons in scene: 62464 (61 spheres * 1024 polys/spheres)
libGL error: failed to create dri screen
libGL error: failed to load driver: nouveau
Visual ID of window: 0xb2
Context is Direct
OpenGL Renderer: Mesa DRI Intel(R) HD Graphics 405 (Braswell)
123.641278 frames/sec - 113.606552 Mpixels/sec
88.389437 frames/sec - 81.215750 Mpixels/sec
87.948239 frames/sec - 80.810360 Mpixels/sec
83.975154 frames/sec - 77.159730 Mpixels/sec
83.749489 frames/sec - 76.952380 Mpixels/sec
