Public bug reported:
OS VERSION
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=17.04
DISTRIB_CODENAME=zesty
DISTRIB_DESCRIPTION="Ubuntu 17.04"
UPOWER VERSION
upower:
Installed: 0.99.4-4
Candidate: 0.99.4-4
Version table:
*** 0.99.4-4 500
500 http://us.archive.ubuntu.com/ubuntu zesty/main amd64 Packages
100 /var/lib/dpkg/status
EXPECTED BEHAVIOR
Expected displays to stay on while idle, for at least a few minutes (per Power
Settings).
WHAT HAPPENED INSTEAD (and hardware information)
I just upgraded from a fully-updated Ubuntu 16.10 64-bit Desktop installation
to 17.04, using the update manager. In 16.10 and 16.04 LTS, this issue did not
exist for me.
I'm using a MacBook Pro with Ubuntu installed in a dual-boot
configuration. I have two attached monitors: one via the mini
DisplayPort and one via HDMI. I normally keep the laptop lid closed
while working. Since the upgrade (persisting through several reboots),
whenever I have the notebook lid closed, if I don't touch the keyboard
or mouse for about 5 seconds, both external displays go into power-
saving mode. When I touch the keyboard/mouse, again, they instantly
come back up (no delay), indicating that the computer had probably not
been suspended. If I then don't touch the keyboard/mouse for another 5
seconds, they immediately go back into power saving mode. (Repeat...)
Going into Display Settings and changing "Built-in Display" to on or off
doesn't seem to have any effect. When I close the lid, it changes
itself back to "OFF"; and when I open the lid, it changes itself back to
"ON". (This seems like a sensible behavior.) Notably, the on/off
switch doesn't seem to move unless I exit and re-enter Display Settings.
I found a workaround to this problem on a forum post:
In "/etc/UPower/UPower.conf", change "IgnoreLid=false" to "IgnoreLid=true".
After doing this, the Built-in Display switch stays on whatever I set it
to, regardless of whether the laptop lid is open or closed (which
probably isn't ideal); but more importantly, the external displays no
longer turn off when idle for a few seconds. They now obey the settings
I explicitly define in Power Settings.
** Affects: upower (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1686157
Title:
External Displays Turn Off After Only A Few Seconds Of Inactivity
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