Comment 82 for bug 1265544

I just noticed the latest drm-intel-nightly (commit f27f16540be56813df2ebb8e1106dd5c258f07c3) has fixed the issue.

After bisecting, it seems the blank screen issues I was getting after modesetting or suspend/resume have been fixed starting from commit:

commit b2f19d1a1d7b262cf5fbe6033776afcf6d1ab526
Author: Paulo Zanoni <email address hidden>
Date: Thu Dec 19 14:29:44 2013 -0200

    drm/i915: set the backlight panel delays registers to 1