https://bugs.kde.org/show_bug.cgi?id=383633
Bug ID: 383633
Summary: Turning off power to external monitor suspends laptop
and stops video signal to external monitor
Product: Powerdevil
Version: 5.10.4
Platform: Fedora RPMs
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-de...@kde.org
Reporter: zi...@kayari.org
Target Milestone: ---
I have a laptop on AC power with an external monitor connected via DisplayPort.
The laptop lid is closed. Powerdevil is configured to suspend when the lid is
closed, but not when an external monitor is connected.
When I turn off the external monitor (e.g. because I'm going to lunch or
otherwise AFK for a while) my session is locked, the system is suspended, and
the external monitor no longer gets any signal until after I open the laptop
lid to unsuspend and then unlock my session.
Steps to reproduce:
Press power button on external monitor to go to standby.
Press again to turn back on.
Results:
When turning the monitor back on I briefly see the locked session screen,
prompting me for a password to unlock, and then the display goes dark. The
monitor pops up a dialogue saying "Switching to power-save mode" meaning that
there is no signal from the computer. Using the mouse or keyboard does not wake
the system up again, I have to open the laptop lid or press the power button to
get the session unlock screen back. Once unlocked I find that my network
connections have been dropped, so any VPN session is lost and must be
reconnected. This is extremely disruptive.
If I change the Powerdevil settings to "When laptop lid is closed: [Do
nothing]" then this doesn't happen. It seems that turning off to the external
monitor (N.B. just putting it in standby, not actually unplugging it from AC
power) is now interpreted as disconnecting that monitor, so the powerdevil
settings for the closed lid take effect.
This behaviour did not happen with previous versions (I recently upgraded from
powerdevil-5.8.7-1.fc24 to powerdevil-5.10.4-1.fc26.x86_64). Previously turning
the screen off and on again did not suspend, so didn't lock my desktop or drop
network connections. How do I restore that old behaviour?
I do not want putting the external monitor in standby to be treated as
disconnecting it.
I want to be able to have:
[x] Button events handling
When laptop lid closed [Suspend]
[ ] Even when an external monitor is connected
And only suspend when the lid is closed if I really disconnect the external
monitor, i.e. remove the displayport cable, not just put the monitor in
standby.
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