Segmentation Fault while using Primus | ubuntu 12.10

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http://askubuntu.com – I have been trying to use primus for a while, but I couldn't manage to get it work. I have followed these instructions; http://www.webupd8.org/2012/11/primus-better-performance-and-less.html Optirun is working pretty nice, however if I try to run primus it fails with a segfault. 04:10 ~ $ primusrun glxspheres Segmentation fault (core dumped) I'm not sure how can I debug this, and why this is happening. syslog is not helpful either Dec 21 04:53:47 n56-laptop kernel: [ 3581.385043] glxspheres[7889]: segfault at 0 ip (null) sp 00007fffda4604a8 error 14 in glxspheres[400000+7000] I'm runn (HowTos)