Debian 8.11 with xserver-xorg-video-mach64:

# glxgears
73 frames in 5.1 seconds = 14.443 FPS
72 frames in 5.0 seconds = 14.286 FPS
72 frames in 5.0 seconds = 14.286 FPS
72 frames in 5.0 seconds = 14.331 FPS
72 frames in 5.0 seconds = 14.331 FPS
72 frames in 5.0 seconds = 14.331 FPS
72 frames in 5.0 seconds = 14.331 FPS
72 frames in 5.0 seconds = 14.332 FPS
72 frames in 5.0 seconds = 14.342 FPS
72 frames in 5.0 seconds = 14.332 FPS

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Debian 8.11 with FBDEV:

# glxgears
72 frames in 5.0 seconds = 14.339 FPS
71 frames in 5.0 seconds = 14.109 FPS
71 frames in 5.0 seconds = 14.065 FPS
71 frames in 5.0 seconds = 14.121 FPS
71 frames in 5.0 seconds = 14.132 FPS
71 frames in 5.0 seconds = 14.132 FPS
71 frames in 5.0 seconds = 14.121 FPS
71 frames in 5.0 seconds = 14.121 FPS
71 frames in 5.0 seconds = 14.133 FPS
71 frames in 5.0 seconds = 14.121 FPS

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Debian sid with xserver-xorg-video-mach64:

# glxgears
[  200.501593] glxgears[272]: illegal instruction (4) at b79fe184 nip b79fe184 lr b68e94f8 code 1
[  200.604040] glxgears[272]: code: d0010078 c0150034 d0010074 c0150038 d0010070 c015003c d001006c ec1f07f2 
[  200.718171] glxgears[272]: code: ec00082a ec3d0772 ec00082a fc200210 <25300001> 3c60b7a0 c043d000 c0750060 
Illegal instruction
# glxgears
[  209.814190] glxgears[273]: segfault (11) at 1 nip b7b60184 lr b6c2c4f8 code 1
[  209.898048] glxgears[273]: code: d0010078 c0150034 d0010074 c0150038 d0010070 c015003c d001006c ec1f07f2 
[  210.012978] glxgears[273]: code: ec00082a ec3d0772 ec00082a fc200210 <95300001> 3c60b7b6 c043f000 c0750060 
Segmentation fault
# glxgears
[  219.078787] glxgears[274]: segfault (11) at 1 nip b7e59184 lr b73e44f8 code 1
[  219.162569] glxgears[274]: code: d0010078 c0150034 d0010074 c0150038 d0010070 c015003c d001006c ec1f07f2 
[  219.277597] glxgears[274]: code: ec00082a ec3d0772 ec00082a fc200210 <85300001> 3c60b7e6 c0438000 c0750060 
Segmentation fault
# glxgears
2 frames in 9.9 seconds =  0.202 FPS
67 frames in 5.0 seconds = 13.385 FPS
67 frames in 5.0 seconds = 13.386 FPS
67 frames in 5.0 seconds = 13.391 FPS
67 frames in 5.0 seconds = 13.393 FPS
67 frames in 5.0 seconds = 13.395 FPS
67 frames in 5.0 seconds = 13.397 FPS
67 frames in 5.0 seconds = 13.375 FPS
67 frames in 5.0 seconds = 13.395 FPS
67 frames in 5.0 seconds = 13.393 FPS

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Debian sid with FBDEV:

# glxgears
[  432.737083] glxgears[310]: segfault (11) at 1 nip b7dcd184 lr b6d374f8 code 2
[  432.820953] glxgears[310]: code: d0010078 c0150034 d0010074 c0150038 d0010070 c015003c d001006c ec1f07f2 
[  432.935870] glxgears[310]: code: ec00082a ec3d0772 ec00082a fc200210 <d5300001> 3c60b7dd c043c000 c0750060 
Segmentation fault
# glxgears
2 frames in 10.0 seconds =  0.200 FPS
61 frames in 5.0 seconds = 12.146 FPS
61 frames in 5.0 seconds = 12.085 FPS
61 frames in 5.0 seconds = 12.086 FPS
61 frames in 5.0 seconds = 12.083 FPS
61 frames in 5.0 seconds = 12.084 FPS
61 frames in 5.0 seconds = 12.085 FPS
61 frames in 5.0 seconds = 12.081 FPS
61 frames in 5.0 seconds = 12.090 FPS
61 frames in 5.0 seconds = 12.087 FPS

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Debian sid with xserver-xorg-video-mach64 running full multiuser and Xfce:

$ glxgears
Segmentation fault
$ glxgears
2 frames in 12.0 seconds =  0.167 FPS
24 frames in 5.1 seconds =  4.716 FPS
24 frames in 5.1 seconds =  4.720 FPS
24 frames in 5.1 seconds =  4.720 FPS
24 frames in 5.1 seconds =  4.718 FPS
24 frames in 5.1 seconds =  4.706 FPS
24 frames in 5.1 seconds =  4.719 FPS
24 frames in 5.1 seconds =  4.719 FPS
24 frames in 5.1 seconds =  4.720 FPS
24 frames in 5.1 seconds =  4.721 FPS
20 frames in 5.1 seconds =  3.899 FPS

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Debian 8.11 with xserver-xorg-video-mach64 running full multiuser and Xfce:

$ glxgears
71 frames in 5.1 seconds = 14.041 FPS
70 frames in 5.1 seconds = 13.856 FPS
71 frames in 5.0 seconds = 14.143 FPS
71 frames in 5.0 seconds = 14.121 FPS
71 frames in 5.0 seconds = 14.132 FPS
71 frames in 5.0 seconds = 14.099 FPS
71 frames in 5.0 seconds = 14.143 FPS
71 frames in 5.0 seconds = 14.098 FPS
71 frames in 5.0 seconds = 14.132 FPS
71 frames in 5.0 seconds = 14.133 FPS
71 frames in 5.0 seconds = 14.143 FPS
