Created attachment 158026 [details] wrong graph shows the negative y-axis The net graph works well in the beginning, though it would finally goes wrong. When the idle time is long enough, the y-axis value would become zero kB/sec. And that is the moment the range of the y-axis goes wrong. I have made some picture showing the bug. plz take a look in the attachment.
Created attachment 158027 [details] Normal graph during editing sth Add the normal graph
I am working on the issue.
nienzu committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/online/commit/51c840249e8a7a094ae9594ab2aea13668c5d66b tdf#130798 admin: Use original data to create network traffic graph