diff --git a/appvm-scripts/etc/profile.d/qubes-gui.csh b/appvm-scripts/etc/profile.d/qubes-gui.csh
index aeb1abdd..2e88cc95 100644
--- a/appvm-scripts/etc/profile.d/qubes-gui.csh
+++ b/appvm-scripts/etc/profile.d/qubes-gui.csh
@@ -1,2 +1,5 @@
-setenv DISPLAY ":0"
-setenv _JAVA_AWT_WM_NONREPARENTING "1"
+setenv DISPLAY ":0" _JAVA_AWT_WM_NONREPARENTING "1"
+if ( -f /var/run/qubes-service/software-rendering )
+  setenv GSK_RENDERER "cairo" GDK_DEBUG "gl-disable vulkan-disable" \
+         LIBGL_ALWAYS_SOFTWARE "1"
+endif
diff --git a/appvm-scripts/etc/profile.d/qubes-gui.sh b/appvm-scripts/etc/profile.d/qubes-gui.sh
index 9e10d14a..522fe588 100644
--- a/appvm-scripts/etc/profile.d/qubes-gui.sh
+++ b/appvm-scripts/etc/profile.d/qubes-gui.sh
@@ -1 +1,5 @@
 export DISPLAY=:0 _JAVA_AWT_WM_NONREPARENTING=1
+if test -f /var/run/qubes-service/software-rendering; then
+  export GSK_RENDERER="cairo" GDK_DEBUG="gl-disable vulkan-disable" \
+         LIBGL_ALWAYS_SOFTWARE=1
+fi