[Bug 251836] x11-wm/plasma5-kwin: freezes with iris (Intel Gen8+)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251836

--- Comment #24 from Roman <[email protected]> ---
I created a file in ~/.drirc with the following content:

<driconf>
    <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"
/>
            <!-- https://gitlab.freedesktop.org/mesa/mesa/-/commit/580fbbb59a60
-->
            <option name="glx_disable_ext_buffer_age" value="true" />
        </application>
    </device>
</driconf>

Switched to the modesetting driver:

[   148.846] (II) modeset(0): [DRI2] Setup complete
[   148.846] (II) modeset(0): [DRI2]   DRI driver: iris
[   148.846] (II) modeset(0): [DRI2]   VDPAU driver: va_gl

And kwin frozen:

kwin_x11 --replace
kwin_core: Compositing is not possible
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2561, resource
id: 29360260, major code: 18 (ChangeProperty), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2853, resource
id: 83886134, major code: 3 (GetWindowAttributes), minor code: 0
OpenGL vendor string:                   Intel
OpenGL renderer string:                 Mesa Intel(R) UHD Graphics 620 (KBL
GT2)
OpenGL version string:                  4.6 (Compatibility Profile) Mesa 20.2.3
OpenGL shading language version string: 4.60
Driver:                                 Intel
GPU class:                              Unknown
OpenGL version:                         4.6
GLSL version:                           4.60
Mesa version:                           20.2.3
X server version:                       1.20.9
Requires strict binding:                yes
GLSL shaders:                           yes
Texture NPOT support:                   yes
Virtual Machine:                        no
Freeze in OpenGL initialization detected
Application::crashHandler() called with signal 6; recent crashes: 1
QSocketNotifier: Invalid socket 10 with type Read, disabling...
QSocketNotifier: Invalid socket 13 with type Read, disabling...

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