Version: unspecified (using KDE 4.6.0) OS: Linux The tab showing system usage has no content in top and bottom panels (CPU usage and Network history) After some research I found that this was caused by missing lines in the file 'SystemLoad2.sgrd' (/home/xxxx/.kde/share/apps/ksysguard/SystemLoad2.sgrd) The lines missing are the <beam> ones. Also seems that end tag </display> is lacking for cpu and network monitoring. Reproducible: Always Steps to Reproduce: Open ksysguard (System monitor) I added the 3 missing 'beam' lines to the file (took them from a 2009 backup I had), added the end tag to the 'display' tags and saved to the proper location and full functions were restored.
This is important to fix, but I don't know what is causing the file to become corrupted.
This seems to be a duplicate of https://bugs.kde.org/show_bug.cgi?id=218796 which also contains a workaround to get these graphs working again.
*** This bug has been marked as a duplicate of bug 218796 ***