Hello,
With update sys-kernel/calculate-sources-3.18.20 and nvidia driver 340.76 / Quadro FX580, we can’t install this driver because there is some problem with kernel configuration during compilation :
echo >&2 " ERROR: Kernel configuration is invalid.";
echo >&2 " include/generated/autoconf.h or include/config/auto.conf are missing.";
echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it.";
I returned to the old kernel meantime.
Thanks for support.
XKomodor | Julien