https://bugs.kde.org/show_bug.cgi?id=406180
--- Comment #51 from Jeffery Patton <roundduckm...@gmail.com> --- (In reply to John A from comment #50) > I can confirm that the regression appears in Kubuntu 19.04 with kwin > 5.15.90, an NVIDIA Optimus setup (NVIDIA is selected as the primary GPU), > OpenGL 3.1 used as the rendering backend and options nvidia_drm modeset=1 > set(to enable PRIME Synchronization and eliminate horizontal screen tearing). > > KWin hangs when using active screen edges (Present Windows), Alt-tabbing and > sometimes when maximizing or moving a window. > > Switching the rendering backend to XRender resolves the issue. XRender doesn't resolve the issue, it's an ugly workaround that forces software rendering. It's just about as bad as disabling Prime Sync. Thanks for confirming this affects the upcoming 5.16 as well though. -- You are receiving this mail because: You are watching all bug changes.
