https://bugs.kde.org/show_bug.cgi?id=458771
Bug ID: 458771 Summary: flickering Product: frameworks-plasma Version: unspecified Platform: Other OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: libplasma Assignee: plasma-b...@kde.org Reporter: p...@pfortin.com CC: m...@ratijas.tk, notm...@gmail.com Target Milestone: --- SUMMARY (frameworks-plasma is my best guess; sorry if wrong) Random flickering; sometimes extremely fast, other times, slow, sometimes, even acting as a toggle. Affects windows, taskbar, systray, digital clock, individual icons, physical screen areas, tabs in tabbed windows, etc. I see many flickering reports; but most are against specific products. This report is to inform KDE that the flickering problem is wide-spread; but appears to be at a container level: windows, taskbar, systray, physical screen, etc as containers. Initially, I blamed firefox nightly: https://bugzilla.mozilla.org/show_bug.cgi?id=1746708 More recently, seeing flickering on multiple applications: firefox, claws-mail, libreoffice calc, ... Sometimes, the flickering acts like a toggle switch: - preform some activity: scroll, click, grab/move, select, etc. - display does not change until I exit/enter the window; often, I have to move the window ever so slightly for the display to update. - window-shading/un-shading sometimes returns an empty window, until I move it. STEPS TO REPRODUCE (firefox) 1. use firefox extensively (lots of windows & tabs) 2. start streaming some video; after a while (an hour or more usually) 3. flickering starts (video affected, sound continues) Usually, the video stream is in a loop toggling between a couple of frames over and over -- speed varies; not always the same speed. In this case, I can open a new firefox window and move the affected tabs to the new window which "solves" the issue for a while. So problem appears to be the window as a container. STEPS TO REPRODUCE (taskbar) 1. use the system 2. hours (usually) after system restarted, taskbar icons will do a "dance" back and forth; sometimes one icon comes and goes, aggravating the "dance" 3. moving the mouse over the affected area affects the issue; usually stops the flickering STEPS TO REPRODUCE (random screen blocks flicker) 1. no idea what triggers these 2. have not seen an obvious trigger, kinda like a Venn diagram, but with rectangles rather than circles. 3. what makes up the rectangles acting like a Venn diagram is not obvious to date. STEPS TO REPRODUCE (zoom video calls) 1. use it 2. after 15-30 minutes, zoom participants freeze or toggle between a couple of frames 3. restart zoom clears it up. (zoom window is a container). OBSERVED RESULT flickering EXPECTED RESULT no flickering SOFTWARE/OS VERSIONS Linux/KDE Plasma: Operating System: Mageia 9 KDE Plasma Version: 5.25.4 KDE Frameworks Version: 5.97.0 Qt Version: 5.15.5 Kernel Version: 5.19.4-server-2.mga9 (64-bit) Graphics Platform: X11 Processors: 20 × 12th Gen Intel® Core™ i7-12700K Memory: 125.5 GiB of RAM Graphics Processor: AMD Radeon RX 6600 XT Manufacturer: Dell Inc. Product Name: XPS 8950 ADDITIONAL INFORMATION After many months of trying to find commonality[1], it's looking more like a race condition. claws-mail uses a notification icon in the systray; normally, updates (new mail, unread mail, no mail) occur instantaneously. When the flickering problem begins, the systray updates are delayed until the mouse is moved out/in the claws-mail window. When flickering gets excessive, even the digital clock starts to flicker digits or the entire clock. Just now, moved mouse over taskbar, and no tooltips appeared, until I switched desktops. [1] first saw this flickering on old Dell M6800 running Mageia8, so I'm not convinced its a hardware issue as some have suggested. -- You are receiving this mail because: You are watching all bug changes.