Bug 209152 - Plasma freezes computer while new wallpaper fades in
Summary: Plasma freezes computer while new wallpaper fades in
Status: RESOLVED UNMAINTAINED
Alias: None
Product: plasma4
Classification: Plasma
Component: wallpaper-image (show other bugs)
Version: 4.6.5
Platform: Debian testing Linux
: NOR normal
Target Milestone: ---
Assignee: Paolo Capriotti
URL:
Keywords:
: 209186 214702 222313 244563 248122 276116 (view as bug list)
Depends on:
Blocks:
 
Reported: 2009-10-02 00:10 UTC by Ben Pearre
Modified: 2018-06-08 19:44 UTC (History)
11 users (show)

See Also:
Latest Commit:
Version Fixed In:


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Description Ben Pearre 2009-10-02 00:10:41 UTC
Version:            (using KDE 4.3.1)
OS:                Linux
Installed from:    Debian testing/unstable Packages

Desktop Settings (the one you get to by right-clicking on the background, not the one you get to by systemsettings):  I've set "Wallpaper" to "Slideshow", and I have pointed it to a directory of my photographs (1.5MB jpegs or so from 6MP camera).

Every time the wallpaper slideshow switches the picture, my system seems to freeze for a few seconds.  Input events are queued but not processed, etc.  Perhaps no other X ops are permitted?

At least a way of turning off the fade-out-and-in thing would help: just switch the wallpaper NOW in one step.  I have "Desktop effects" completely disabled through systemsettings, but apparently the wallpaperer doesn't care.

Thanks!
-Ben

Also:

xorg 7.4
xserver-xorg-video-intel 2.9.0
Comment 1 Andras Georgy Bekes 2009-10-09 14:40:11 UTC
Have exactly the same problem on nvidia card.
xorg: 1:7.4+4
nvidia-glx: 185.18.36-2

Isn't this the same problem as bug 209186 ?
Comment 2 Beat Wolf 2009-12-17 11:43:54 UTC
*** Bug 214702 has been marked as a duplicate of this bug. ***
Comment 3 Marcelo Sales 2010-04-13 16:44:33 UTC
I have this problem too.
Comment 4 Nicolas L. 2010-06-07 11:55:33 UTC
Is this bug  still valid with kde 4.4.4 or kde 4.5beta ?
Comment 5 Nicolas L. 2010-06-07 11:59:04 UTC
*** Bug 209186 has been marked as a duplicate of this bug. ***
Comment 6 Ben Pearre 2010-06-13 18:04:59 UTC
Seems better under 4.4.4 (thanks!), but still not great.

Why not have the option of not animating it?  With today's 15MP
cameras, it seems that this will always take up quite a bit of CPU,
won't it?
Comment 7 Kamil Neczaj 2010-06-13 18:31:40 UTC
I was working good in previous kde versions, probably 4.2, It's a 4.3 regression
Comment 8 Kamil Neczaj 2010-06-13 18:32:12 UTC
*It

Sorry for mistake :]
Comment 9 Beat Wolf 2010-09-08 21:16:04 UTC
*** Bug 244563 has been marked as a duplicate of this bug. ***
Comment 10 Beat Wolf 2010-09-08 21:16:08 UTC
*** Bug 222313 has been marked as a duplicate of this bug. ***
Comment 11 John Florian 2010-09-08 23:47:16 UTC
I'm also having this problem on one system but not the other and can perhaps
add some vital detail.  Both systems have nVidia cards and both use the nv
driver.  Both are Fedora 13 running KDE 4.4.5.

One has desktop effects enabled and works great (no delay in wallpaper
transitions, no excessive CPU load).

The other system cannot use desktop effects because it's a 3-head xinerama system and transitions there typically take 5-10 seconds and cause all other processes to suffer intensely as the load spikes during that time.
Comment 12 Claude Sadois 2011-12-03 14:16:54 UTC
is it still valid with newer versions? (kde/drivers...)
Comment 13 Marcelo Sales 2011-12-03 14:33:26 UTC
This is not resolved yet, the problem still persists. Well, at least until KDE 4.6.5, which is the version I'm using.
People who are running more up to date versions, please comment.
I would agree with the solution proposed by the OP, which is to disable the fade out/in effect and just switch the photos. 
Of course the fade effect makes the transition more pleasant, but not if it freezes the computer while the photo changes. If this can not be fixed, I think it's better to remove the fade effect.
Comment 14 Aaron J. Seigo 2011-12-03 17:30:19 UTC
"With today's 15MP cameras, it seems that this will always take up quite a bit of CPU,
won't it?"

the image is scaled to the screen's resolution, in a non-blocking thread, before it is painted. so this doesn't matter (other than the CPU time to scale it the first time)
Comment 15 Kolia 2011-12-03 17:37:58 UTC
*** Bug 248122 has been marked as a duplicate of this bug. ***
Comment 16 Myriam Schweingruber 2012-05-28 13:02:06 UTC
*** Bug 276116 has been marked as a duplicate of this bug. ***
Comment 17 Nate Graham 2018-06-08 19:44:05 UTC
Hello!

This bug report was filed for KDE Plasma 4, which reached end-of-support status in August 2015. KDE Plasma 5's desktop shell has been almost completely rewritten for better performance and usability, so it is likely that this bug is already resolved in Plasma 5.

Accordingly, we hope you understand why we must close this bug report. If the issue described  here is still present in KDE Plasma 5.12 or later, please feel free to open a new ticket in the "plasmashell" product after reading https://community.kde.org/Get_Involved/Bug_Reporting

If you would like to get involved in KDE's bug triaging effort so that future mass bug closes like this are less likely, please read https://community.kde.org/Get_Involved#Bug_Triaging

Thanks for your understanding!

Nate Graham