Ubuntu
linux package

  1. Bug #1189639
  2. Comment #1

Comment 1 for bug 1189639

Revision history for this message
Chris Wilson (ickle) wrote : Re: External Screen doesn't wake up from sleep

It is suspicious that it would only appear to fail whilst the monitor is off - that suggests we are missing a required wait for one of the control lines to power up.

Can you please 'echo 6 > /sys/modules/drm/parameters/debug' then xset dpms force off, wake it up (hopefully reproducing the issue) and then attach the output of dmesg?