primusrun [segfault] and optirun works

[mbieren]

Hello,

since the last update of the mesa libs primusrun does segfault (while optirun has no problems). The solution is to specify PRIMUS_UPLOAD=2 (PBO) in the environment. I do not know exactly why maybe somebody has the same problem.

Eg.

$ primusrun glxgears ..... crash
$ optirun glxgears ...... fine
$ PRIMUS_UPLOAD=2 primusrun glxgears ... fine

When using

$ PRIMUS_VERBOSE=2 primusrun glxgears -info

you will get

primus: profiling: upload autodetection: will use PBO path (36 iters)
Speicherzugriffsfehler (Speicherabzug geschrieben)

So I asume 2 is the correct value for this since the problem is solved

Regards

Michael

[Guest]

While I'm not Kubuntu user, I registered here just to say:

THANK YOU!!!

I don't know where you found this solution, but I couldn't find it. My life is much better now

EDIT: On the other hand, the performance is unfortunately much worse (30fps in glxspheres).
EDIT2: Using PRIMUS_UPLOAD=1 also prevents crashing for me and also does not hit the performance.