black square the size of a quarter tiled window appears in right hand corner when using desktop cube workspace switching effect. using amd radeon hd 6310 with open source drivers
Same here, kde-neon-user edition https://www.hostingpics.net/viewer.php?id=794438Screenshot20170624155231.png See also https://forum.ubuntu-fr.org/viewtopic.php?id=2011329
Better seen here maybe https://www.hostingpics.net/viewer.php?id=500732Screenshot20170626123531.png as trying to screenshot the cube-effect gives weird results. Additional info : intel graphics HD 4600
*** Bug 372604 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 361516 ***