465639 2023-02-12 20:39:19 +0000 High CPU usage after starting Plasma 2023-04-06 15:17:00 +0000 1 1 4 Plasma kwin compositing 5.27.1 Other Linux RESOLVED WORKSFORME https://bugs.kde.org/show_bug.cgi?id=452119 NOR normal --- 0 tarequemd.hanif kwin-bugs-null nate tarequemd.hanif 0 oldest_to_newest 2207341 0 tarequemd.hanif 2023-02-12 20:39:19 +0000 It's taking almost 60% CPU after starting Plasma from tty with startx. There is a workaround, If I go to system settings, and set Vsync to anything else, the CPU spike stops. The Vsync option was on "Automatic", so I change it to "Only when cheap", then it gets fixed. If the Vsync option was on "Only when cheap", if I change it to "Automatic", it gets fixed. I can see in htop that kwin_x11 is taking 50-60% CPU when the issue arises. I can help by providing any profiling or other information. SOFTWARE/OS VERSIONS Linux/KDE Plasma: kernel 6.1.11-arch1-1 (available in About System) KDE Plasma Version: 5.26.5 KDE Frameworks Version: 5.102.0 Qt Version: 5.15.8 ADDITIONAL INFORMATION: GPU: Intel HD Graphics 620 2208809 1 tarequemd.hanif 2023-02-17 10:42:11 +0000 I just updated Plasma to 5.27 on my laptop. And I see the same high CPU usage. But this time when I changed the "Latency" setting in the Compositor settings to "Balance of latency and smoothness". By default it was "Force smoothest animations". The VSync option is not there anymore. As this commit (https://invent.kde.org)/plasma/kwin/-/commit/cf583aa3673cfca275b64d25c457d9e4a298c46c) suggests, I am guessing this will be fixed in Plasma 6. 2208810 2 tarequemd.hanif 2023-02-17 10:43:39 +0000 (In reply to Tareque Md Hanif from comment #1) > I just updated Plasma to 5.27 on my laptop. And I see the same high CPU > usage. But this time when I changed the "Latency" setting in the Compositor > settings to "Balance of latency and smoothness". By default it was "Force > smoothest animations". The VSync option is not there anymore. > As this commit > (https://invent.kde.org)/plasma/kwin/-/commit/ > cf583aa3673cfca275b64d25c457d9e4a298c46c) suggests, I am guessing this will > be fixed in Plasma 6. Sorry, commit link corrected. https://invent.kde.org/plasma/kwin/-/commit/cf583aa3673cfca275b64d25c457d9e4a298c46c 2208987 3 nate 2023-02-17 18:30:18 +0000 So when you change the latency setting to "Balance of Latency and Smoothness", the issue goes away? FWIW I have the same GPU and can't reproduce the issue. Can you attach the contents of Info Center > Graphics > Window Manager? 2211833 4 tarequemd.hanif 2023-02-26 09:07:39 +0000 > So when you change the latency setting to "Balance of Latency and Smoothness", the issue goes away? Yes. Here is the output of "Window Manager" in Info Center. https://invent.kde.org/-/snippets/2516 2215755 5 bug-janitor 2023-03-13 03:45:19 +0000 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! 2218849 6 bug-janitor 2023-03-28 03:45:43 +0000 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! 2220694 7 tarequemd.hanif 2023-04-05 21:54:59 +0000 Fixed by removing picom. 2220807 8 nate 2023-04-06 15:17:00 +0000 What is picom? This thing? https://github.com/yshui/picom