@@ -, +, @@ 
---
 graphics/mesa-dri/Makefile              |  3 +++
 graphics/mesa-dri/files/01-freebsd.conf | 10 ++++++++++
 graphics/mesa-dri/pkg-plist             |  1 +
 3 files changed, 14 insertions(+)
 create mode 100644 graphics/mesa-dri/files/01-freebsd.conf
--- b/graphics/mesa-dri/Makefile	
+++ b/graphics/mesa-dri/Makefile	
@@ -3,6 +3,7 @@ 
 
 PORTNAME=	mesa-dri
 PORTVERSION=	${MESAVERSION}
+PORTREVISION=	1
 CATEGORIES=	graphics
 
 COMMENT=	OpenGL hardware acceleration drivers for DRI2+
@@ -112,5 +113,7 @@ PLIST_SUB+=	${_vd}_VDRIVER="@comment "
 
 post-install:
 	@${RM} -r ${STAGEDIR}/etc/OpenCL
+	${INSTALL_DATA} ${FILESDIR}/01-freebsd.conf \
+		${STAGEDIR}${PREFIX}/share/drirc.d
 
 .include <bsd.port.post.mk>
--- /dev/null	
+++ b/graphics/mesa-dri/files/01-freebsd.conf	
@@ -0,0 +1,10 @@ 
+<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>
--- b/graphics/mesa-dri/pkg-plist	
+++ b/graphics/mesa-dri/pkg-plist	
@@ -33,5 +33,6 @@ include/GL/internal/dri_interface.h
 libdata/pkgconfig/dri.pc
 @comment libdata/pkgconfig/gbm.pc
 share/drirc.d/00-mesa-defaults.conf
+share/drirc.d/01-freebsd.conf
 %%INTEL_VDRIVER%%share/vulkan/icd.d/intel_icd.%%ARCH%%.json
 %%AMD_VDRIVER%%share/vulkan/icd.d/radeon_icd.%%ARCH%%.json