https://bugs.kde.org/show_bug.cgi?id=527116
briktor <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |[email protected] --- Comment #6 from briktor <[email protected]> --- I can confirm this with a different setup, also on an RX 9070 XT. System: - KWin 6.8.0 and 6.8.1, Wayland, CachyOS - Mesa 26.2.5 (RADV) - Kernel 7.3.0, and also reproduced on 6.18.55 LTS - GPU: AMD Radeon RX 9070 XT - DP-2: LG UltraFine, 3840x2160@60, HDR + WCG enabled, scale 1.5, VRR not supported - DP-3: BenQ XL2730Z, 2560x1440@144 (portrait), VRR automatic Fullscreen games on DP-2 via Proton/DXVK became very choppy, visibly well below 30 fps, with heavy input lag, as soon as no cursor was visible on DP-2. That happened both when the game hides the cursor and when the cursor is moved over to DP-3. MangoHud kept showing a stable 60 fps, so the game keeps presenting; it's the delivery to the screen that stalls. Whenever a cursor is visible on DP-2, it runs perfectly smooth. First noticed one day after upgrading from KWin 6.7.5 to 6.8.0. Switching DP-2 from "prefer efficiency" to "prefer accuracy" fixes it completely and immediately, without restarting anything. Things that did NOT help: - KWIN_DRM_NO_DIRECT_SCANOUT=1 - disabling HDR on DP-2 - disabling "allow tearing in fullscreen" - running DP-3 at 60 Hz - PROTON_ENABLE_WAYLAND=1 - different Proton builds (proton-cachyos 11, Proton Hotfix) - forcing GPU clocks to high (power_dpm_force_performance_level) - LTS kernel 6.18 - DXVK dxgi.syncInterval = 0 I haven't tried KWIN_DRM_NO_AMS=1, since the accuracy setting already fixed it. -- You are receiving this mail because: You are watching all bug changes.
