Mathematica si blocca X11, backtrace incluso, correlato a GLX?

Alcuni comandi di plotter Mathematica mandano in crash il mio server X con questo backtrace:

 
0: X(xorg_backtrace+0x3b) [0x812d8eb]
1: X(xf86SigHandler+0x9e) [0x80c0e0e]
2: [0x96b400]
3: /usr/lib/dri/i915_dri.so(intelDestroyContext+0x11e) [0x3693a2]
4: /usr/lib/dri/i915_dri.so [0x34b476]
5: /usr/lib/xorg/modules/extensions//libglx.so [0x18a359]
6: /usr/lib/xorg/modules/extensions//libglx.so(__glXFreeContext+0x91) [0x17e3d1]
7: /usr/lib/xorg/modules/extensions//libglx.so [0x17e427]
8: X(FreeResourceByType+0xf2) [0x806dbd2]
9: /usr/lib/xorg/modules/extensions//libglx.so [0x17a6b7]
10: /usr/lib/xorg/modules/extensions//libglx.so [0x17e730]
11: X(Dispatch+0x35f) [0x80869df]
12: X(main+0x395) [0x806bbf5]
13: /lib/libc.so.6(__libc_start_main+0xe6) [0x720a66]
14: X [0x806b0a1]

C'è qualcosa di evidentemente sbagliato qui?

Il messaggio di errore in Mathematica:

 
In[11]:= Export["/tmp/math.jpg",%, ImageSize->{800,600}] 
Qt-subapplication: Fatal IO error: client killed 
xset:  unable to open display ":0.0" 
xset:  unable to open display ":0.0" 
xset:  unable to open display ":0.0" 
Can't open display.