Originally posted by bwkaz
Yes, post (actually, don't post it, attach it) /var/log/XFree86.0.log.
No, /usr/lib/tls has nothing to do with it.
Thanks bwkaz for your answer !
But after reading some threads about "glx" on this forum, I find my fault .... I just forgot to uncomment the line " # load "glx" " in my XF86Config-4 ....
And now, I'll try to configure my second screen ....