Hello,
  After selecting "Inspect" the resulting graph is drawn incorrectly.  It appears
roughly as a single line in the center of the graph.

Thanks!
C.

The reason for this is that rrdtool changed its behavior between 1.4
and 1.5. It used to include timestamps in the xport command, and now
it does not by default. You can add --showtime to rrdtool xport to
restore the previous behavior.  In ganglia, this ends up being in
/usr/share/ganglia-webfrontend/graph.php on line 1089:
--------------
  // This command will export values for the specified format in XML
  $command = $rrdtool .
    " xport --start '" . $rrdtool_graph_start .
    "' --end '" .  $rrdtool_graph_end . "' --showtime"
--------

Modifying it as above fixes the bug. I think this should be patched in
debian 9 as it is low impact and only fixes a bug.

See: https://sourceforge.net/p/ganglia/mailman/message/35440616/
and: https://github.com/oetiker/rrdtool-1.x/issues/672

Hello

i cannot reproduce this bug in 3.7.5+debian-4 release. 

Bullseye ships 1.7 release of rrdtool so the gap you mention between
1.4 and 1.5 releases of rrdtool is an old stuff, IMHO.

If no further information is provided i'll close this bug.

Greetings,
Marcos

Dear Maintainer,

inspect works for me too. I agree that the bug should be closed.

Jochen