Dear Maintainer, Occasionally - maybe once a week - after re-waking a sleeping monitor, the screen resolution changes as per subject. Settings, Display then shows a maximum available resolution of 2560x1440. Logging out and in keeps the lower resolution, but Settings, Display now allows it to be changed back to 2840x2160. Monitor is Dell P2715Q; graphics card is NVIDIA Corporation GP107GL [Quadro P620] (rev a1).