Weird... I don't think I have seen that sort of crash. Running out of memory/swap sometimes has similar results, but Dominions3 doesn't take that much for startup.
Anyway, I don't have anything graphics related in package.use, and in make.conf I have VIDEO_CARDS="vesa vga i810 i915 intel", which is a bit much, but that doesn't matter, and I don't really got which cards are i810 and which are i915... And I think at some point they changed it to "intel" anyway, but I didn't remove those before.
Anyway, I had some problems with stable intel video, and upgraded the whole thing to masked-by-~x86, including necessary parts of X system. I haven't encountered any problems with that, so it might help.
One tricky part is that some of those ebuilds need portage-2.2, so you might want to upgrade that as well. Those are hard-masked, but I haven't seen any problems, and they should be moving towards release sometime soon.
The relevant part of my package.keywords is:
Code:
#Xs
=x11-drivers/xf86-video-intel-2.6.1 ~x86 # upgraded today
=x11-base/xorg-server-1.5.2 ~x86
=x11-libs/pixman-0.12.0 ~x86
=x11-libs/libpciaccess-0.10.5 ~x86
=x11-proto/xproto-7.0.13 ~x86
=x11-apps/xauth-1.0.3 ~x86
=x11-libs/libXrender-0.9.4 ~x86
=x11-libs/libXau-1.0.4 ~x86
=x11-libs/xtrans-1.2.2 ~x86
=x11-misc/xkeyboard-config-1.4 ~x86
=x11-apps/rgb-1.0.3 ~x86
<x11-apps/xinit-1.0.9 ~x86
=x11-proto/randrproto-1.2.2 ~x86
=x11-libs/libXfont-1.3.3 ~x86
=x11-proto/renderproto-0.9.3 ~x86
=x11-drivers/xf86-input-keyboard-1.3.1 ~x86
=x11-drivers/xf86-video-vesa-2.0.0 ~x86
=x11-drivers/xf86-input-mouse-1.3.0 ~x86
=x11-drivers/xf86-input-synaptics-0.15.2-r2 ~x86
#graphic drivers
media-libs/mesa ~x86
x11-proto/xf86driproto ~x86
x11-proto/dri2proto ~x86
x11-libs/libdrm ~x86
x11-libs/libXxf86vm ~x86
x11-libs/libX11 ~x86
x11-libs/libXext ~x86
x11-apps/mesa-progs ~x86
x11-proto/xextproto ~x86
x11-proto/inputproto ~x86
The particular versions on most of those are not that relevant, I just didn't want to have automatic updates to unstable of that many packages.
Hope this helps and doesn't completely break your system
