<driconf>
    <device driver="crocus">
        <application name="kwin_x11" executable="kwin_x11">
            <!-- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268955 -->
            <option name="glx_extension_override" value="-GLX_EXT_buffer_age" />
        </application>
    </device>
    <device driver="iris">
        <application name="kwin_x11" executable="kwin_x11">
            <!-- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251836 -->
            <option name="glx_extension_override" value="-GLX_EXT_buffer_age" />
        </application>
    </device>
</driconf>
