https://bugs.kde.org/show_bug.cgi?id=3D344326

--- Comment #29 from Thomas L=C3=BCbking <thomas.luebking@gmail.com> ---
"Interestingly" I gest some screen corruption w/ changing the amout of scre=
ens
on KF5.

I wonder whether it's the same issue and, depending on the HW/setup, the wa=
ke
from STR implies a screen (size) change as well.

This patch "mostly"* resolves it.


diff --git a/scene_opengl.cpp b/scene_opengl.cpp
index 7584dd5..de7b7a9 100644
--- a/scene_opengl.cpp
+++ b/scene_opengl.cpp
@@ -839,7 +839,9 @@ void SceneOpenGL::screenGeometryChanged(const QSize &si=
ze)
     m_backend->screenGeometryChanged(size);
     ShaderManager::setVirtualScreenSize(size);
     GLRenderTarget::setVirtualScreenSize(size);
-    GLVertexBuffer::setVirtualScreenSize(size);
+    GLVertexBuffer::cleanup();
+    GLVertexBuffer::initStatic();
+//     GLVertexBuffer::setVirtualScreenSize(size);
     ShaderManager::instance()->resetAllShaders();
 }

* The change takes quite long. During that time the screen is black + mouse
cursor but after a few seconds (~10?) I get a normal desktop.

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