[Powerdevil] [Bug 353538] New: screen switches off when playing video in VLC or even when screen blanking is switched off

[Martin Steigerwald]

https://bugs.kde.org/show_bug.cgi?id=353538

            Bug ID: 353538
           Summary: screen switches off when playing video in VLC or even
                    when screen blanking is switched off
           Product: Powerdevil
           Version: 5.4.1
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: plasma-devel at kde.org
          Reporter: Martin at Lichtvoll.de

I had this in KDE SC 4 times already.

During playback of a movie with VLC the screen switches off after a while. This
even happens when I disable screen blanking and screen switching off in *all*
of the powerdevil energy profiles.

Reproducible: Always

Steps to Reproduce:
1. Play a movie with VLC.

Or

1. Disable screen blanking and switching off in all profiles.

Actual Results:  
Screen still blanks.

Even tough while playing a movie with VLC powerdevil plasma applet actually
reported that VLC inhibits power saving.

Expected Results:  
Screen does not blank.

In KDE SC 4.14 times this helped:

martin at merkaba:~/bin#130> cat noblank.sh 
#!/bin/sh
while true; do qdbus org.kde.screensaver /ScreenSaver SimulateUserActivity ;
sleep 60 ; done


But with Plasma 5 this script has no effect. The method is still available
though.

Additionally I tried xset -dpms but it had no effect either.

I use activities, but none of it has special energy saving settings. So I
expect the global settings to apply.



This happens on ThinkPad T520 with two screens:

martin at merkaba:~> phoronix-test-suite system-info

Phoronix Test Suite v5.2.1
System Information

Hardware:
Processor: Intel Core i5-2520M @ 3.20GHz (4 Cores), Motherboard: LENOVO
42433WG, Chipset: Intel 2nd Generation Core Family DRAM, Memory: 16384MB, Disk:
300GB INTEL SSDSA2CW30 + 480GB Crucial_CT480M50, Graphics: Intel HD 3000
(1300MHz), Audio: Conexant CX20590, Monitor: P24T-7 LED, Network: Intel 82579LM
Gigabit Connection + Intel Centrino Advanced-N 6205

Software:
OS: Debian unstable, Kernel: 4.3.0-rc3-tp520-btrfstrim+ (x86_64), Desktop: KDE
Frameworks 5, Display Server: X Server 1.17.2, Display Driver: intel 2.99.917,
OpenGL: 3.3 Mesa 11.0.2, Compiler: GCC 5.2.1 20150911, File-System: btrfs,
Screen Resolution: 3840x1080

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