I am not sure is this 'supported' use case. So, the plasma popups, dialogs, sliding windows, etc. do not have blur. Seems tabbox has (though the shadow is not 100% functional - but this doesn't concerns me). Reproducible: Always
Created attachment 84094 [details] support info
Created attachment 84095 [details] visuals
What's the ouput of xprop _KDE_NET_WM_BLUR_BEHIND_REGION for the window? If there is any, does the behavior change for disabling "cacheTexture: true" in "kcmshell4 kwincompositing", 2nd tab?
(In reply to comment #3) > What's the ouput of _KDE_NET_WM_BLUR_BEHIND_REGION(CARDINAL) = 0, 0, 317, 219, 1, 219, 316, 1 > If there is any, does the behavior change for disabling "cacheTexture: true" > in "kcmshell4 kwincompositing", 2nd tab? Can you tell me the config key? kwin-compositing-kcm does not compile ATM. Aditional note - tooltips do have blur applied. It's just the plasma popups it seems.
(In reply to comment #4) > kwin-compositing-kcm does not compile ATM. Ok, built it, but cannot disable caching - tickmark removal is not possible it seems (maybe incorrect connect() or something...) Cannot see clearly in KWin(4) config what would be the correct key.
kwriteconfig --file kwinrc --group Effect-Blur --key CacheTexture false The properties are ok, but eventually Marco has added changes for https://git.reviewboard.kde.org/r/113884/ https://git.reviewboard.kde.org/r/113885/ PS: it'll unlikely ever be moved upstream, but might be helpful https://git.reviewboard.kde.org/r/109892/ I also got some local fixes if you're interested.
(In reply to comment #6) > kwriteconfig --file kwinrc --group Effect-Blur --key CacheTexture false Ok, did it manually, as i am not sure would this write to kde4 or kf5 config :) Disabling cache did not change anything. (Only that the flicker when popup are withdrawing is gone - but that is valid for KDE4 era also) > PS: it'll unlikely ever be moved upstream, but might be helpful > https://git.reviewboard.kde.org/r/109892/ > I also got some local fixes if you're interested. Nice! Maybe a bump would push it forward? :-) I shall try it meanwhile
(In reply to comment #0) > I am not sure is this 'supported' use case. I fear it is not - plasma-shell does have blur applied to dialogs...
It should work(tm). But I can kind of confirm your observation: at least KRunner does not have blur and Plasma-shell has. Though with plasma-desktop I also get blur - just switched to plasma-desktop for testing and it's working just fine. My fair guess is that we have a problem with recognizing when the blur effect is available.
maybe i misunderstood, but could be review 121459 fixes this?
(In reply to Hrvoje Senjan from comment #10) > maybe i misunderstood, but could be review 121459 fixes this? yes, quite likely
I think nowadays that's no longer a supported setup.