SUMMARY STEPS TO REPRODUCE 1. Activate any other window decoration than "Breeze". 2. Switch to another virtual desktop and observe the dropped framerate of the effect. OBSERVED RESULT Effect and Animation stutter EXPECTED RESULT Effects behave the same as before: smooth SOFTWARE/OS VERSIONS Windows: macOS: x Linux/KDE Plasma: Arch Linux / KDE Plasma 5.20.3 (available in About System) KDE Plasma Version: 5.20.3 KDE Frameworks Version: 5.76.0 Qt Version: 5.15.1 Render Drive: Mesa Intel(R) UHD 620 (KBL GT2) OpenGL: 4.6 (Compatibility Profile) Mesa 20.2.2 ADDITIONAL INFORMATION
I can confirm this on kwin_x11. STEPS TO REPRODUCE: 1. Enable KWin FPS desktop effect 2. Install Infinity-Aurorae window decoration 3. Make the desktop effect for switching desktops (e.g. Slide) slow (between 1200 and 1500 ms should be enough) 4. Use a dark wallpaper (to make the FPS effect show up better) 5. Have any window open in one virtual desktop and keep the other empty. 6. Switch between desktops OBSERVED RESULT (My screen refresh rate is set to 60) (Let's call virtual desktop a VD) If I'm using Breeze: In a VD with windows open, FPS is 60, and when you attempt to switch to an empty VD, during the effect FPS lowers to a max of 47, and afterwards it goes back to 60. a.k.a. 60 > 47 > 60 In an empty VD, FPS is 60, and when you attempt to switch to a VD with open windows, during the effect FPS lowers to a max of 47, and afterwards it goes back to 60. a.k.a. 60 > 47 > 60 Compare this with when I'm using Infinity-Aurorae: In a VD with windows open, FPS is 47, and when you attempt to switch to an empty VD, during the effect FPS stays mostly the same (47), and afterwards it goes up to 60. a.k.a. 47 > 47 > 60 In an empty VD, FPS is 60, and when you attempt to switch to a VD with open windows, during the effect FPS lowers to a max of 44, and afterwards it goes up to 47. a.k.a. 60 > 44 > 47 EXPECTED RESULT With a refresh rate of 60, you should have 60 > 47 > 60 no matter the theme used. ADDITIONAL INFORMATION Operating System: openSUSE Tumbleweed 20201119 (Krypton, Plasma from git) KDE Plasma Version: 5.20.80 KDE Frameworks Version: 5.77.0 Qt Version: 5.15.1 Kernel Version: 5.9.8-2-default OS Type: 64-bit Processors: 4 × Intel® Core™ i5-7200U CPU @ 2.50GHz Memory: 15.5 GiB of RAM Graphics Processor: Mesa DRI Intel® HD Graphics 620