Some windows have a broken blur

[NIICKTCHUNS]

Some windows have this weird broken blur after compiling the latest main

As we can see, it has some "squares" that are blurring, but most of the little window doesnt get the blur

Also, on Resolve the titlebar isn't getting the blur at all, this also happen with another window that I dont recall right now, seems pretty similar with an old bug that I've reported #26

[xarblu]

Well that looks like a new one. Do you know the last version/commit that worked?

[NIICKTCHUNS]

Well that looks like a new one. Do you know the last version/commit that worked?

Sorry for the really late reply, I looked at the notification but I wasnt home. Anyways.

I actually don't know when this started happening, but I think it was with some commit from July 2

[NIICKTCHUNS]

Also, look at this

Gravacao_de_tela_20260706_194740.webm

If you want to test this out, this is a window created by this plugin to Dolphin. https://github.com/Blumlaut/dolphin-compress-media-av1

I think this is the easiest way to replicate this bug
o/

[DevKingofEarth]

Sorry for another thread, but Here is what I found,

System Environment:

• OS: NixOS (pinned Better Blur DX as unstable nixpkg channel)
• Better Blur DX: Version 2.5.1
• KDE Plasma Version: 6.6.5
• Qt Version: 6.11.1
• Mesa Driver: 26.1.3
• Session Type: Wayland
• WM Theme: Darkly

The Bug:
When enabling the effect on modern Plasma 6 builds, windows/panels render with pure alpha transparency instead of a blur layer.

Diagnostic Logs & Verification:

1. Flake Strictness Check: My local system builds Better Blur DX with an explicit inputs.nixpkgs.follows = "nixpkgs" mapping. The plugin is compiling cleanly against local system headers, but KWin rejects the binary at runtime anyway.
2. KWin Support Dump: Checking qdbus support information reveals that the plugin fails to initialize entirely. It is completely missing from the Loaded Effects array within KWin's active state.
3. Journald Render Context Error: When attempting to force-initialize the desktop effect via system settings filters, plasma-kwin_wayland drops the following context errors:

   kwin_wayland: Could not delete render time query because no context is current
   kwin_wayland: No backend specified, automatically choosing drm
   
   

Sorry that I am not able to help, but I wanted to share this.

[xarblu]

I have some changes in main that may have fixed this (at least based on my guess what the issue is)

[NIICKTCHUNS]

I have some changes in main that may have fixed this (at least based on my guess what the issue is)

Didn't solve it, #107 (comment) it still the same

[DevKingofEarth]

I have some changes in main that may have fixed this (at least based on my guess what the issue is)

Didn't solve it, #107 (comment) it still the same

Then you should share you logs, which might have different issue. Or if it is still crashing as I shared, in the loaded effect array, whether is it appearing or not, or like any errors, etc. It might be helpful.

[NIICKTCHUNS]

Then you should share you logs, which might have different issue. Or if it is still crashing as I shared, in the loaded effect array, whether is it appearing or not, or like any errors, etc. It might be helpful.

Sorry for my ignorance, but how do I get these logs for an KWin effect?

[DevKingofEarth]

Then you should share you logs, which might have different issue. Or if it is still crashing as I shared, in the loaded effect array, whether is it appearing or not, or like any errors, etc. It might be helpful.

Sorry for my ignorance, but how do I get these logs for an KWin effect?

Well I am not sure about your system, so check this out, also I am not any expert, so I may be wrong or like not enough of it.

https://hastebin.ianhon.com/14c9

You can share your insights, thank you for your interest.

[xarblu]

Then you should share you logs, which might have different issue. Or if it is still crashing as I shared, in the loaded effect array, whether is it appearing or not, or like any errors, etc. It might be helpful.

Sorry for my ignorance, but how do I get these logs for an KWin effect?

https://github.com/xarblu/kwin-effects-better-blur-dx/blob/main/docs/debugging.md

But I'm not sure how useful they are for this specific issue. This feels more like a subtle logic bug somewhere and not something that goes fatally wrong (well it does look very wrong but isn't something obvious like "GL texture allocation failed").
It looks more like the GPU starts painting the texture but somehow stops/skips at random points.

[NIICKTCHUNS]

https://github.com/xarblu/kwin-effects-better-blur-dx/blob/main/docs/debugging.md

But I'm not sure how useful they are for this specific issue. This feels more like a subtle logic bug somewhere and not something that goes fatally wrong (well it does look very wrong but isn't something obvious like "GL texture allocation failed"). It looks more like the GPU starts painting the texture but somehow stops/skips at random points.

I don't think this shows anything at all tho..

here it is with that window from

jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Size: KWin::Rect(2459,264 183x152)
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Size: KWin::Rect(2461,266 179x148)
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Size: KWin::Rect(2461,266 179x148)
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Size: KWin::Rect(2462,267 177x146)
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Size: KWin::Rect(2462,267 177x146)
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Size: KWin::Rect(2464,269 173x142)
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Size: KWin::Rect(2464,269 173x142)
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "kdialog org.kde.kdialog" 
                                                 PID: 32539 
                                                 Size: KWin::Rect(2465,270 171x140)
jul 08 19:16:38 archtchuns kwin_wayland[26189]: better_blur_dx: Window removed: 
                                                 windowClass: "kdialog org.kde.kdialog" 
                                                 windowType: KWin::WindowType::Normal 
                                                 isPlasmaSurface: false 
                                                 isMenu: false 
                                                 blurOrigin: "RequestedFrame,ForcedContent" 
                                                 maximizedState: "Restored" 
                                                 isBlurFullyCovered: false

Also, on Prism Launcher, on the dialog to close the game, the first line was on the game, then on the launcher, then on the window which has the broken blur

jul 08 19:23:52 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "Minecraft* 1.21.11 Minecraft* 1.21.11" 
                                                 PID: 98249 
                                                 Size: KWin::Rect(2453,274 854x506)
jul 08 19:23:58 archtchuns kwin_wayland[26189]: better_blur_dx: MaximizedState changed: 
                                                 windowClass: "prismlauncher org.prismlauncher.PrismLauncher" 
                                                 windowType: KWin::WindowType::Normal 
                                                 isPlasmaSurface: false 
                                                 isMenu: false 
                                                 blurOrigin: "None" 
                                                 maximizedState: "Restored" 
                                                 isBlurFullyCovered: false 
jul 08 19:23:58 archtchuns kwin_wayland[26189]: better_blur_dx: Window added: 
                                                 windowClass: "prismlauncher org.prismlauncher.PrismLauncher" 
                                                 windowType: KWin::WindowType::Normal 
                                                 isPlasmaSurface: false 
                                                 isMenu: false 
                                                 blurOrigin: "None" 
                                                 maximizedState: "Restored" 
                                                 isBlurFullyCovered: false 
jul 08 19:23:58 archtchuns kwin_wayland[26189]: better_blur_dx: Blur origin changed: 
                                                 windowClass: "prismlauncher org.prismlauncher.PrismLauncher" 
                                                 windowType: KWin::WindowType::Normal 
                                                 isPlasmaSurface: false 
                                                 isMenu: false 
                                                 blurOrigin: "RequestedFrame,ForcedContent" 
                                                 maximizedState: "Restored" 
                                                 isBlurFullyCovered: false 
jul 08 19:23:58 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "prismlauncher org.prismlauncher.PrismLauncher" 
                                                 PID: 98110 
                                                 Size: KWin::Rect(2680,498 400x124)
jul 08 19:23:58 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "prismlauncher org.prismlauncher.PrismLauncher" 
                                                 PID: 98110 
                                                 Size: KWin::Rect(2680,498 400x124)
jul 08 19:23:58 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "prismlauncher org.prismlauncher.PrismLauncher" 
                                                 PID: 98110 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required
jul 08 19:23:58 archtchuns kwin_wayland[26189]: better_blur_dx: Creating BlurCacheEntry: "prismlauncher org.prismlauncher.PrismLauncher" 
                                                 PID: 98110 
                                                 Size: KWin::Rect(2671,496 418x128)
jul 08 19:23:58 archtchuns kwin_wayland[26189]: better_blur_dx: Invalidated cache: "prismlauncher org.prismlauncher.PrismLauncher" 
                                                 PID: 98110 
                                                 Flags: "FULL" 
                                                 Reason: New framebuffers required

To my noobish eyes it doesn't seem that this debugging show anything weird

[xarblu]

Yea like I said this looks more like a subtle issue with the commands we send to OpenGL and that doesn't really have any logging.

Could you try with the new cache killswitch (ce052e3) enabled to see if it's caching related or a general issue with the pipeline?

[NIICKTCHUNS]

Yea like I said this looks more like a subtle issue with the commands we send to OpenGL and that doesn't really have any logging.

Could you try with the new cache killswitch (ce052e3) enabled to see if it's caching related or a general issue with the pipeline?

Apparently it is a general issue, on/off doesn't change anything with any window that i've shown above :\

[xarblu]

well that still narrows it down a bit, thanks for checking

[NIICKTCHUNS]

The way I make my windows blurred is by making a window rule for every single window, but that doesnt seem to be the problem, since after the latest commit from yesterday, I do not have blur on any Qt window, GTK/Libadwaita programs are getting the forced blur just fine without any "crackling", even on the terminal with the native blur method there.

Also, here are my Force blur settings

Gravacao_de_tela_20260711_105632.webm

Edit: For some reason neither on video or on print the blur is showed, but on the areas that I'm hovering my mouse the blur is showing, on the rest of the window it isn't showing
Edit 2: Actually, not every GTK window get the blur like Shelly