https://bugs.kde.org/show_bug.cgi?id=315628

            Bug ID: 315628
           Summary: Compositing ignores window- or application-based
                    (inactive) transparency/opacity setting.
    Classification: Unclassified
           Product: kwin
           Version: 4.10.0
          Platform: Gentoo Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: compositing
          Assignee: kwin-bugs-null@kde.org
          Reporter: info@pc-tiede.de

Though I've set opacity (inactive) for an application and a specific window to
be enforced to 100% (no transparency), the window still gets transparent as
soon as it looses focus.

Reproducible: Always

Steps to Reproduce:
This assumes compositing is active as well as the transparency effect and the
latter is set to make inactive windows transparent.

1. Start vlc
2. Select "More Options->Specific settings for this window" from the main
window's title bar.
3. Select "Appearance & Corrections" (fourth tab)
4. Tick "Opacity (inactive)
5. Select "Forced"
6. Enter "100%"
7. Click "OK"
8. Restart vlc
9. Open another window
Actual Results:  
vlc's main window gets transparent as per the global transparency settings.

Expected Results:  
vlc's main window should be completely opaque even though it lost focus.

I've seen this behavior in kwin versions prior to 4.10.0, iirc it was at least
broken in 4.5.0 as well, did not check every version in between.

Screenshots of effect will be added (unfortunately my locale is german, but the
wrong translucency of the window despite its settings can be seen).

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