[Bug 850628]

[Thomas-luebking]

(In reply to comment #201)
> (In reply to comment #200)
> > > I can't find an option to automatically suspend compositing in KCM.
> > Because a general setting would be silly. Already was for unredirection.
> Probably it won't.
> http://standards.freedesktop.org/wm-spec/wm-spec-latest.html#idp6357888

This is not about "a general setting" at all, but about a protocol.
The silly part about the *general* setting was that we treated konqueror and quake equally.

The _NET_WM_BYPASS_COMPOSITOR was actually somehow inspired by the (largely ignored) _KDE_NET_WM_BLOCK_COMPOSITING, so merging the atoms and deprecate _KDE_NET_WM_BLOCK_COMPOSITING certainly makes sense.
It will  require to move the blocking code from Client to Toplevel - does anything but (upcoming) SDL2 support it so far?

> https://git.reviewboard.kde.org/r/110088/
> I think this could be a good "default" option

The problem of this is that we don't get out of the "default" since
there's no system in place to rule override_redirects (since they do not
belong to WM or user)

The _NET_WM_BYPASS_COMPOSITOR tristate is a red herring: if special clients are not interested in saying: "1", why should regular clients be interested in saying "2"?
And why esp. those which are override_redirect and thus often don't set any properties at all?

The next problem is that unmanged windows are only matched "fullscreen"
by their geometry, so if your imagebrowser opens a popup to preview the
image and uses the maximum screen area, you'll toggle compositing by it.

-> The only (present) "downstream" (user accessible) way to control
those (and FS state changes of managed clients) is via the script
interface.

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https://bugs.launchpad.net/bugs/850628

Title:
  When the Euphoria (GL) Screensaver starts, KWIN crashes

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