** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Confirmed
** Summary changed:
- External Screen doesn't wake up from sleep
+ [dp] External Screen doesn't wake up from sleep
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file was in /sys/module/drm/parameters/debug (instead of modules).
Attached is dmesg
** Attachment added: "dmesg.log"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1189639/+attachment/3700814/+files/dmesg.log
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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) a
