Bug 346456

Summary:	When screen turn off automatically, it will turn black twice.
Product:	[Plasma] Powerdevil	Reporter:	Weng Xuetian <wengxt>
Component:	general	Assignee:	Plasma Development Mailing List <plasma-devel>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kde
Priority:	NOR
Version:	5.2.95
Target Milestone:	---
Platform:	Chakra
OS:	Linux
Latest Commit:	http://commits.kde.org/powerdevil/1005dd9a25c5fafea1f781c6d2a49fe99e219a34	Version Fixed In:	5.4.2
Sentry Crash Report:

Description Weng Xuetian 2015-04-22 04:52:25 UTC

When set screen off automatically, the screen will turn black first, then turn on quickly and then turn black again. My graphic card is intel.
I suspect this is caused by the new feature of powerdevil invoking kwin effect.

Reproducible: Sometimes

Comment 1 Kai Uwe Broulik 2015-04-23 21:07:20 UTC

The effect kicks in 5 seconds before turning off the screen but will automatically end after 8 seconds to prevent blocking the workspace. Perhaps your screen takes longer to suspend and the effect quits prior to that.

Comment 2 Weng Xuetian 2015-08-27 16:12:58 UTC

Emm, I don't know. I also noticed that this also happens when I use keyboard to decreaes the brightness to zero, as shown in the video: http://youtu.be/9vdwxsO_zW8

Comment 3 Weng Xuetian 2015-09-12 01:29:57 UTC

Git commit 1005dd9a25c5fafea1f781c6d2a49fe99e219a34 by Weng Xuetian.
Committed on 12/09/2015 at 01:28.
Pushed by xuetianweng into branch 'Plasma/5.4'.

Fix the brightness update

1. Update to m_cachedBrightnessMap is ignored during the animation. This
change queries the real brightness after animation is finished.
2. setting start/endvalue will also trigger the valueChanged in
QPropertyAnimation, disconnect the slot on valueChanged after stop() and
reconnect it before start().
Related: bug 350676
REVIEW: 125156
FIXED-IN: 5.4.2

M  +3    -0    daemon/backends/upower/powerdevilupowerbackend.cpp

http://commits.kde.org/powerdevil/1005dd9a25c5fafea1f781c6d2a49fe99e219a34