When I enable "System Settings // Desktop Effects // General // Enable desktop dffects on startup" every video playback (e.g xine with vdpau or vlc not using vdpau) suffers from the same problem: the picture doesn't move smoothly, at least every one or two seconds the picture seems to stop for a nearly not noticeable moment and then quickly jumps over the lost frames to the current one. The audio doesn't seem to be affected. I can find hints like the one in the URL box in www that other people notice this too - but nothing here so I just want to drop a notice. On my machine, this problem came with KDE 4 and the introduction of desktop effects in general, so I had them deactivated. Just gave it a try with new 4.9.3, but the problem is still there. By the way: looking at a cpu-Monitor the CPU seems to be at ease. Reproducible: Always Steps to Reproduce: 1. Enable OpenGL (Desktop Effects) 2. Play a video with xine/ vlc (x-driver seems to be of no relevance) - Actual Results: playback shutters/ shivers/ shortly hangs Expected Results: Playback should look like when OpenGL (Desktop Effects) are disabled I am using nvidia-drivers - but I don't know if this is of relevance here
Please provide the output of qdbus org.kde.kwin /KWin supportInformation Does this happen when playing back windowed or fullscreen or regardless and with all video material or only HD content?
I remember having this effect first with mpeg2-SD(PAL) material, but this was some tome ago on a slower machine. Currently the effect isn't there or isn't visible with SD-mpeg2. With h264-720p I can see the problems described with desktops effects turned on. The size of the window (or full screen or not) doesn't seem to have any impact. The required output with desktops effects turned on: qdbus org.kde.kwin /KWin supportInformation KWin Support Information: The following information should be used when requesting support on e.g. http://forum.kde.org. It provides information about the currently running instance, which options are used, what OpenGL driver and which effects are running. Please post the information provided underneath this introductory text to a paste bin service like http://paste.kde.org instead of pasting into support threads. ========================== Options ======= focusPolicy: 0 nextFocusPrefersMouse: false clickRaise: true autoRaise: false autoRaiseInterval: 0 delayFocusInterval: 0 shadeHover: false shadeHoverInterval: 250 tiling: false tilingLayout: 1 tilingRaisePolicy: 0 separateScreenFocus: false activeMouseScreen: false placement: 4 focusPolicyIsReasonable: true borderSnapZone: 10 windowSnapZone: 10 centerSnapZone: 0 snapOnlyWhenOverlapping: false showDesktopIsMinimizeAll: false rollOverDesktops: true focusStealingPreventionLevel: 1 legacyFullscreenSupport: false operationTitlebarDblClick: commandActiveTitlebar1: 0 commandActiveTitlebar2: 30 commandActiveTitlebar3: 2 commandInactiveTitlebar1: 4 commandInactiveTitlebar2: 30 commandInactiveTitlebar3: 2 commandWindow1: 7 commandWindow2: 8 commandWindow3: 8 commandWindowWheel: 31 commandAll1: 10 commandAll2: 3 commandAll3: 14 keyCmdAllModKey: 16777251 showGeometryTip: false electricBorders: false electricBorderDelay: 150 electricBorderCooldown: 350 electricBorderPushbackPixels: 1 electricBorderMaximize: true electricBorderTiling: true borderlessMaximizedWindows: false killPingTimeout: 5000 hideUtilityWindowsForInactive: true inactiveTabsSkipTaskbar: false autogroupSimilarWindows: false autogroupInForeground: true compositingMode: 1 useCompositing: true compositingInitialized: true hiddenPreviews: 1 unredirectFullscreen: false glSmoothScale: 2 glVSync: true xrenderSmoothScale: false maxFpsInterval: 17 refreshRate: 0 vBlankTime: 6144 glDirect: true glStrictBinding: false glStrictBindingFollowsDriver: true Compositing =========== Qt Graphics System: native Compositing is active Compositing Type: OpenGL OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce 210/PCIe/SSE2 OpenGL version string: 3.3.0 NVIDIA 304.64 Driver: NVIDIA Driver version: 304.64 GPU class: G80/G90 OpenGL version: 3.3 X server version: 1.12.4 Linux kernel version: 3.6 Direct rendering: yes Requires strict binding: no GLSL shaders: yes Texture NPOT support: yes OpenGL 2 Shaders are used Loaded Effects: --------------- kwin4_effect_zoom kwin4_effect_slidingpopups kwin4_effect_minimizeanimation kwin4_effect_translucency kwin4_effect_screenshot kwin4_effect_slide kwin4_effect_desktopgrid kwin4_effect_dialogparent kwin4_effect_highlightwindow kwin4_effect_taskbarthumbnail kwin4_effect_presentwindows kwin4_effect_blur kwin4_effect_logout kwin4_effect_dashboard kwin4_effect_outline kwin4_effect_startupfeedback Currently Active Effects: ------------------------- kwin4_effect_blur Effect Settings: ---------------- kwin4_effect_zoom: zoomFactor: 1.25 mousePointer: 0 mouseTracking: 0 enableFocusTracking: false followFocus: true focusDelay: 350 moveFactor: 20 targetZoom: 1 kwin4_effect_slidingpopups: fadeInTime: 250 fadeOutTime: 250 kwin4_effect_minimizeanimation: kwin4_effect_translucency: decoration: 1 moveResize: 0.8 dialogs: 1 inactive: 1 comboboxPopups: 1 menus: 1 individualMenuConfig: false dropDownMenus: 1 popupMenus: 1 tornOffMenus: 1 kwin4_effect_screenshot: kwin4_effect_slide: kwin4_effect_desktopgrid: zoomDuration: 300 border: 10 desktopNameAlignment: 0 layoutMode: 0 customLayoutRows: 2 usePresentWindows: true kwin4_effect_dialogparent: changeTime: 300 kwin4_effect_highlightwindow: kwin4_effect_taskbarthumbnail: kwin4_effect_presentwindows: layoutMode: 0 showCaptions: true showIcons: true doNotCloseWindows: false ignoreMinimized: false accuracy: 20 fillGaps: true fadeDuration: 150 showPanel: false leftButtonWindow: 1 rightButtonWindow: 2 middleButtonWindow: 0 leftButtonDesktop: 2 middleButtonDesktop: 0 rightButtonDesktop: 0 dragToClose: false kwin4_effect_blur: blurRadius: 12 cacheTexture: true kwin4_effect_logout: useBlur: true kwin4_effect_dashboard: brightness: 0.5 saturation: 0.5 blur: false kwin4_effect_outline: kwin4_effect_startupfeedback:
pot. a double sync issue (since 4.9.3 should no longer have the server grab during the paint) Try to deactivate vertical syncing i kwin (it's not working on nvidia chips anyway, see https://git.reviewboard.kde.org/r/107198/) and if that helps, check the various sync settings in nvidia-settings. If it should still happen with all syncing disabled (run "kwin --replace &" after adjusting nvidia-settings) please activate the "show fps" plugin, play such video. See whether it still judders. If yes, make a screenshot that reflects the "common" appearance of the "show fps" output or describe what you see (colors and line bars)
Created attachment 75618 [details] Snapshot of show fps The more complicated the video gets (the more movements) the more the amount of broader grey bars.
Puh, I am a litlle bit lost in all these configuration possibilities. First tries, feedback so far: Disabling "Use VSync" in the advanced tab in combination choosing "smooth" instead of "accurate" in the Scale method box does bring some ease, kwin show fps plugin shows about 8 to ten frames more than with "Use VSync" enabled when there are complicated picture moves in the video (about 65). All in all I see no effect turning options like "Sync to VBlank" off or on in nvidia-settings (after doing "kwin --replace &" ) or choosing XRender instead of OpenGL (apart from the show fps plugin showing no fps with XRender choosen ...). But still, the best playback is achieved with Desktop effects turned off. With Desktop Effects turned on something seems to pause the playback for some hundred milliseconds every one or some more seconds - I don't know how to describe it better. In addition I uploaded a hopefully typical output of show fps during video playback.
- At what framerate does that video play? - What's the output of kreadconfig --file kwinrc --group Compositing --key MaxFPS - What happens after kwriteconfig --file kwinrc --group Compositing --key MaxFPS 120 qdbus org.kde.kwin /KWin reconfigure and toggling the compositor (press Shift+Alt+F12 twice)
- At what framerate does that video play? 50 fps - What's the output of kreadconfig --file kwinrc --group Compositing --key MaxFPS The output is empty - What happens after kwriteconfig --file kwinrc --group Compositing --key MaxFPS 120 qdbus org.kde.kwin /KWin reconfigure The output of the former command shows 120. The video playback doesn't seem to be effected (=isn't getting better). This time, I used a 1080i video @25fps with xine and vdpau as output video driver. In generally, the problems are more visible here than with the 720p video I used recently. And again, leaving the settings as just proposed and turning desktops effects off, the video playback becomes smooth (no shuttering, no dropped frames). Turning desktops effect on, I see the video pause and skip at the same timecodes where it ran o.k. with desktops effects turned off.
Dear Bug Submitter, This bug has been stagnant for a long time. Could you help us out and re-test if the bug is valid in the latest version? I am setting the status to NEEDSINFO pending your response, please change the Status back to REPORTED when you respond. Thank you for helping us make KDE software even better for everyone!
Dear Bug Submitter, This is a reminder that this bug has been stagnant for a long time. Could you help us out and re-test if the bug is valid in the latest version? This bug will be moved back to REPORTED Status for manual review later, which may take a while. If you are able to, please lend us a hand. Thank you for helping us make KDE software even better for everyone!
This issue report is quite old. Can you please confirm, that it still persists with Plasma 5.23?
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!