All right, Post-workaround, just before the reboot.
Originally Posted by andrikos
sudo aticonfig --px-list
PowerXpress: Discrete GPU is active (High-Performance mode).
Just out of curiosity, are the warnings anything to be worried about?
sudo aticonfig --px-dgpu
PowerXpress info: Diagnostic output from /usr/lib/fglrx/switchlibglx:
update-alternatives: warning: forcing reinstallation of alternative /usr/lib/fglrx/ld.so.conf because link group x86_64-linux-gnu_gl_conf is broken
update-alternatives: warning: not replacing /usr/lib/x86_64-linux-gnu/xorg/extra-modules with a link
PowerXpress: Discrete GPU is selected (High-Performance mode), please restart Xserver(s) for changes to take effect!