Created attachment 131811 [details] screenshot of ksysguard SUMMARY CPU History and Network History are blank in System Load view STEPS TO REPRODUCE 1. Open Ksysguard, System Load View 2. Er... 3. Observe empty CPU History and Network History. OBSERVED RESULT See attachment EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
I can confirm this issue, which started to appear somewhere in September for me. Creating a new sheet and adding a CPU load graph works, though.
ksysguard is no longer maintained, in Plasma 6 there is the Plasma system monitor for this task. If your issue still happens with the Plasma 6 replacement, please re-open and we can move this bug to the new product, thanks!