Description of problem: A sensor face org.kde.ksysguard.linechart flickers and makes plasma-systemmonitor to crash eventually.A sensor face like e.g. org.kde.ksysguard.piechart works without an issue. Version-Release number of selected component (if applicable): 5.25.4 How reproducible: Always. Steps to Reproduce: 1. Type in "plasma-systemmonitor" in Konsole 2. Press an enter key 3. Click on an "Overview page" button in the left pane 4. Wait for an "Overview page" to load Actual results: Whole screen flickers, keyboard and mouse input lags. Expected results: No flickering. Additional info: 1) A workaround is to run plasma-systemmonitor by typing in "LD_LIBRARY_PATH=/usr/lib64 plasma-systemmonitor" in Konsole 2) My GPU driver is nvidia-340.108, installed from RPM Fusion 3) Happens also for plasma-nm after unhiding a spoiler to show the network speed graph 4) Reported also on https://bugs.kde.org/show_bug.cgi?id=449005
Even simpler steps to Reproduce: 1. wget https://invent.kde.org/frameworks/kquickcharts/-/raw/master/examples/snippets/linechart.qml 2. qmlscene linechart.qml Actual results: No graph shown. Expected results: A graph shown. Workaround: LD_LIBRARY_PATH=/usr/lib64 qmlscene linechart.qml What I've found is that by prefixing with LD_LIBRARY_PATH=/usr/lib64 I run llvmpipe renderer instead of nvidia one. Following library is loaded /usr/lib64/libGL.so.1 then instead of /usr/lib64/nvidia-340xx/libGL.so.1. The bug must be somewhere in kf5-kquickcharts or nvidia driver.