I use a secondary display attached to my laptop as my main display at home. Under Plasma 5 the display stays always on showing my screen content. Either the "screen energy saving" setting should apply to every display or there should be a way to make all displays go black after a time idle (under screen locking maybe?). At least I would like the display to go black to avoid burning it :S Maybe the lock screen turns the display off after a while, but I don't use a lock screen while on AC so that could be the cause I'm experiencing this? Reproducible: Always
Can you try "xset dpms force off" and see if that works properly? If it does not, then it's a driver/X issue.
I have the same problem. "xset dpms force off" works properly and both monitor turns off.
"xset dpms force off" works as expected for me as well.
I've just tested this on my laptop with an external display and after setting Screen Energy Saving to 1 minute both my laptop and external monitor are turned off. Can you please test and confirm if this issue is still occurring or if this bug report can be marked as resolved. I'm setting status to "needsinfo" pending your response, please change back to "reported" or "resolved" when you respond, thanks.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!