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Bug 2243

Summary:	Flicker effect from compositor fade effects
Product:	TDE	Reporter:	Kristopher <gamrat.kristopher>
Component:	tdebase	Assignee:	Timothy Pearson <kb9vqf>
Status:	NEEDINFO ---
Severity:	normal	CC:	bugwatch, gamrat.kristopher, kb9vqf
Priority:	P5
Version:	R14.0.x [Trinity]
Hardware:	Other
OS:	Linux
Compiler Version:		TDE Version String:
Application Version:		Application Name:

Description Kristopher 2014-12-08 13:26:05 CST

When the TDE Compositor's fade effects are enabled, items the "fade" occassionaly produce a sort of "flicker" effect (as if rapidly fading in and out) that lasts about 1 second, before stabilizing and displaying normally. The flicker is specific to the item that's fading in/out, *not* the entire screen (and personal experience suggests that screen flicker is exceedingly rare on releative "young" LCDs anyways).

This effect is sporadic yet frequent, and semes most common with menus and Yakuake's summon/retract animation, though occaisionally happens with windows.

Comment 1 Timothy Pearson 2014-12-08 14:09:14 CST

I haven't seen this on my test systems.  Can you reproduce this with a stock "compton" compositor running?

To try this, open a Konsole window and:
sudo apt-get install compton
killall -9 compton-tde
compton

then try to reproduce the menu glitch.

Thanks!

Comment 2 Kristopher 2014-12-08 14:30:23 CST

(In reply to Timothy Pearson from comment #1)
> I haven't seen this on my test systems.  Can you reproduce this with a stock
> "compton" compositor running?
> 
> To try this, open a Konsole window and:
> sudo apt-get install compton
> killall -9 compton-tde
> compton
> 
> then try to reproduce the menu glitch.
> 
> Thanks!

apt-get's output:

piki@Piki-PC:~$ sudo apt-get install compton
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package compton

Also, I'm still affected by bug 1474 , so running killall may kill my TDE session before I got the chance to run compton, even if compton was available on Debian.

Comment 3 Kristopher 2014-12-18 15:07:29 CST

I just noticed today that when this bug occurs, compton-tde's CPU usage seems to spike anywhere from 5% to 20% above normal, as does the item this bug applies to (regardless of whether or not it's a TDE app. When this bug does *not* occur, compton-tde generally stays aroudn 2% or lower, and I do not see any other unusual CPU spikes.