Comment # 5 on bug 66673 from Dmitry Derevyanko

With 
kernel: 3.11.3 gentoo version
mesa: git(Oct 3) builded with gles
xf86-video-ati: git(Oct 3)
libdrm: git(Oct 3)
llvm: git(Oct 3)
glamor: git(Oct 3) builded without gles

I can boot to kde (with radeon.dpm=1 in kernel cmdline) but some activity in
firefox leads to GPU lockup, what has nothing to do with this bug.
Without gles in mesa I can't boot at all. As described before.
Maybe it'll help find problem.