If it helps, this is the output of intel_reg dump before and after it happens for me. This is the sequence:
1) Boot into a gnome 3 desktop (everything works fine)
2) intel_reg dump > intel_reg-dump-ok
3) Lock the screen with gnome (turns off the display)
4) Unlock the screen (here I start getting the flickering)
5) intel_reg dump > intel_reg-dump-flickering
If it helps, this is the output of intel_reg dump before and after it happens for me. This is the sequence:
1) Boot into a gnome 3 desktop (everything works fine) dump-flickering
2) intel_reg dump > intel_reg-dump-ok
3) Lock the screen with gnome (turns off the display)
4) Unlock the screen (here I start getting the flickering)
5) intel_reg dump > intel_reg-