[systemsettings] [Bug 340971] New: Compositing type is overridden when not supported

[Michael Mounteney]

https://bugs.kde.org/show_bug.cgi?id=340971

            Bug ID: 340971
           Summary: Compositing type is overridden when not supported
           Product: systemsettings
           Version: unspecified
          Platform: Gentoo Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: gate03 at landcroft.co.uk

If one logs in via hardware that supports OpenGL compositing, it is possible to
set the System Settings / Desktop Effects / Advanced / Compositing Type to
OpenGL and enjoy the benefits thereof.  However, if one then logs out and logs
in again via different hardware (e.g., xdmcp remote) that does not support
OpenGL, the compositing type is reset to XRender so that if one then returns to
the first hardware, the setting of OpenGL is lost.

Solution:  don't have KDE overriding values that the user has specified.  If it
is considered desirable, warn via a dialog, but provide the option not to
override.  I.e., the dialog should ask "This setup doesn't support OpenGL;  do
you want to fall back to XRender ? Y/N" with the tick-box "don't ask this
question again".

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