Just docked my laptop and woke it up from sleep and it detected the two
monitors.

This was either fixed in the latest kernel or after I disabled polling
in drm_kms_helper:

echo N > /sys/module/drm_kms_helper/parameters/poll

I put it into /etc/rc.local to make it permanent.


** Changed in: xserver-xorg-video-nouveau (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/999141

Title:
  Dual monitor DisplayPort stopped working.

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