[Powerdevil] [Bug 348529] Turn off screen after lock screen

[Martin Gräßlin]

https://bugs.kde.org/show_bug.cgi?id=348529

--- Comment #13 from Martin Gräßlin <mgraesslin at kde.org> ---
Some thoughts from using my system. I often listen to music provided by 
the computer. The computer's audio is connected through HDMI to one of 
my screens. When the screen goes into DPMS the audio is turned off with 
a loud *knacks* and when being turned on again it *knacks* again.

When I listen to music I hate it when the system goes into DPMS.

Even worse, though, is that the screen is very slow when going into DPMS 
or returning from it. The screen needs a fair 10 sec or more to do the 
mode switch. And it cannot handle it correctly. After resume from DPMS 
I'm greeted with a message that "invalid mode is used", while in truth 
everything is correct. To get rid of the message I need to press the 
menu button of the screen.

The screen is about 5/6 years old.

I'm telling this just to make aware that not all users would benefit 
from instant turning on DPMS when going to lock the screen. It can be 
highly annoying.

Given that we must have an option for it. I do see the energy saving 
aspect and would suggest to reduce the timeout to 30 sec after the 
screen is locked. But if DPMS is broken the normal energy saving levels 
should be used. We do support things like audio control in the lock 
screen. This doesn't make sense if the system goes into DPMS every half 
a minute.

Also we need to be careful. We only should do this if the screen gets 
locked either explicitly by the user or through idle timeout. Not when 
switching user session or going to suspend.

-- 
You are receiving this mail because:
You are the assignee for the bug.