https://bugs.kde.org/show_bug.cgi?id=438176
Bug ID: 438176 Summary: Extremely choppy screen with multi-monitor setup Product: kwin Version: 5.21.5 Platform: Manjaro OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: compositing Assignee: kwin-bugs-n...@kde.org Reporter: oto.st...@gmail.com Target Milestone: --- Created attachment 139041 --> https://bugs.kde.org/attachment.cgi?id=139041&action=edit Output of glxinfo I have a multi-monitor setup, with a 1080p laptop screen and a 1440p monitor. When I set my screens in the settings so that the laptop screen is to the bottom-left of the larger monitor (as is the case physically), the whole session becomes extremely choppy (about 1 FPS or less). Turning off the laptop screen (by closing the lid) often resolves the issue temporarily and everything looks normal even after turning the laptop screen back on. However, any screen resolution changes while both screens are on reintroduce the issue. This problem only seems to occur when there is no screen positioned at the 0,0 co-ordinates in the screen configuration. When I place the laptop screen to the top-left of the larger monitor, everything is fine, as well as when the laptop screen is to the right of the larger monitor. It also only occurs when the Rendering backend is set to OpenGL (any version), and only in X11. Wayland does not seem to be affected. SOFTWARE/OS VERSIONS KDE Plasma Version: 5.21.5 KDE Frameworks Version: 5.82.0 Qt Version: 5.15.2 -- You are receiving this mail because: You are watching all bug changes.