Created attachment 84943 [details]
dmesg of kernel w/ gpu reset info

Without 600_DEBUG=sb game loads but poor performance

With 600_DEBUG=sb GPU resets over and over unless VT switch out of X to
console.

cmdline: BOOT_IMAGE=/vmlinuz-3.11.0-0.rc7.git2.2.fc21.x86_64
root=/dev/mapper/fedora-root ro rd.lvm.lv=fedora/swap rd.md=0 rd.dm=0 rd.luks=0
vconsole.keymap=us rd.lvm.lv=fedora/root rhgb quiet slub_debug=-
cgroup_disable=memory radeon.dpm=1 console=tty0 console=ttyS0,38400n8
LANG=en_US.UTF-8    

See dmesg attachment for gpu reset information

RPMs:

mesa-libGL-9.2-0.14.20130723.fc19.x86_64
libdrm-2.4.46-1.fc19.x86_64
kernel-3.11.0-0.rc7.git2.2.fc21.x86_64 (non-debug builds)