Comment 23 for bug 1522922

(In reply to Oscar Morante from comment #17)
> 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

Oscar, please add drm.debug=14 module parameter, and attach dmesg all the way from boot to repeating the above (no need to redo the dumps, just 1,3,4). Make sure you capture the dmesg for a sequence that reproduces the issue. Thanks.