Version: SVN (using Devel) OS: Linux When blur is enabled kwin cpu goes from 0 to 5->6% and stays there even though no blur effect is being displayed. I'm running Nvidia 256 series drivers, Nvidia 9500gt cpu, 64bit openSuse 11.3 and kde 4.6svn with qt4.6 Reproducible: Always Steps to Reproduce: enable blur Actual Results: cpu goues up Expected Results: no cpu spike
I have the same driver, the same video card, the same architecture and the same problem, but in Arch Linux. For me kwin CPU usage is 0 during idle and grows up only with any actions. Especially strongly during watching HD-videos — 10-20%.
This might be a problem of the NVIDIA driver. I read a lot about problems with the latest revision, but never about problems with 195.x
When watching 360p videos on youtube firefox CPU usage is 23-25%, xorg is 3-4% and kwin is 14-18%...
I've tried both driver series (195 & 256) and enabling blur takes 5% of my cpu without the blur effect being initiated - just being enabled.
Created attachment 49602 [details] Sysprof log After installing oxygen-transparent from svn and enabling kwin blur effect you will see more clear situation. Now, while playing video from youtube, kwin CPU usage is 40-50%, after disabling the blur effect — 3-4%.
I can confirm that enabling blur efect causes increase of kwin CPU usage to 50 and even more percent. It happened after upgrade to KDE 4.5.0.
Same here, KDE 4.5.1. Performance drastically improves after Blur effect is switched to off. 8600GTS/FreeBSD 8.0
The problem is still persists in KDE 4.6.3.
It's a long time since 4.6, so I just have to ask whether the problem is still present?
I stopped using it enabling it today and it does not appear to work, maybe my new card is now blacklisted (running Nvidia 430gt, had a 9500gt iirc, with latest self compiled drivers under openSUSE 13.1 x64 & KDE 11.2.0) fyi - transparency and wobbly window do work
What's the output of "qdbus org.kde.kwin /KWin supportInformation"?
http://pastebin.com/3Kh4W1Ui Blur Behind: no kwin4_effect_blur kwin4_effect_blur kwin4_effect_blur: blurRadius: 7 blur: false useBlur: true
blur is supported and active - don't forget that the client has to set the blur regions. -> restart plasma-desktop? -> reconfigure oxygen-transparent/qtcurve/bespin? -> apparently no CPU spike then? ;-)
"don't forget that the client has to set the blur regions"?? - I thought blur would blur windows behind the window I was moving if the moving window was transparent. How to set blur regions? sorry but configure what? Decorations? using Oxygen them and Oxygen decorations obviously been long time and now I'm confused, sorry
There's no general blurring - clients indicate whether and what background they want to be blurred (to eg. not blur areas behind shadow etc.) If you want a window to generally blur: xprop -f _KDE_NET_WM_BLUR_BEHIND_REGION 32c -set _KDE_NET_WM_BLUR_BEHIND_REGION 0 click a window. should now be blurred. xprop -remove _KDE_NET_WM_BLUR_BEHIND_REGION click the window again. should be unblurred.
It's been ~4 years since last comment, does the problem still persist?
Even if the implementation changed significantly so if it still exists it would be a different bug.