This bug is reproducible. It occurs the moment NetworkManager's notification popup says You are now connected to the wireless network.

Thanks for taking the time to report this bug.
Unfortunately, that stack trace is missing some elements that will help a lot to solve the problem, so it will be hard for the developers to fix that crash. Can you get us a stack trace with debugging symbols? Please see http://live.gnome.org/GettingTraces for more information on how to do so and reopen this bug or report a new one. Thanks in advance!

That stacktrace looks weird, net_scale (g=0x888c800, din=692622044, dout=166773341), din/dout are unrealistic.

Now i think about it, if it's reproducible, could you please start gnome-system-monitor from a terminal like this:

GNOME_SYSTEM_MONITOR_DEBUG= gnome-system-monitor

that should spit some debug info.

Sorry it took so long to get the info -- the bug quit happening for a little while. Anyway, here it is:

** (gnome-system-monitor:27039): DEBUG: [22.909 load-graph.cpp:418 net_scale] bak 1400202648 new_max 314572800 pow2 27 coef10 300
**
** ERROR:(load-graph.cpp:419):void net_scale(LoadGraph*, unsigned int, unsigned int): assertion failed: (bak_max <= new_max)
Could not find the frame base for "IA__g_spawn_command_line_sync".
Could not find the frame base for "IA__g_assertion_message".
Could not find the frame base for "IA__g_assertion_message_expr".
Could not find the frame base for "g_timeout_dispatch".
Could not find the frame base for "g_main_context_iterate".
Could not find the frame base for "Gtk::Main::run_impl()".
Could not find the frame base for "IA__g_spawn_sync".

And just in case something else caused it this time, (it was while switching networks again) here's what bug buddy spits out:

Distribution: Gentoo Base System release 2.0.0
Gnome Release: 2.22.3 2008-08-11 (Gentoo)
BugBuddy Version: 2.22.0

System: Linux 2.6.25-gentoo-r7 #3 SMP PREEMPT Sun Aug 24 02:12:30 PDT 2008 i686
X Vendor: The X.Org Foundation
X Vendor Release: 10402000
Selinux: No
Accessibility: Enabled
GTK+ Theme: Clearlooks
Icon Theme: gnome

Memory status: size: 42450944 vsize: 42450944 resident: 16080896 share: 13103104 rss: 16080896 rss_rlim: 4294967295
CPU usage: start_time: 1220172257 rtime: 134 utime: 126 stime: 8 cutime:0 cstime: 0 timeout: 0 it_real_value: 0 frequency: 100

Backtrace was generated from '/usr/bin/gnome-system-monitor'

[?1034hUsing host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb80056d0 (LWP 27039)]
0xb8045424 in __kernel_vsyscall ()

+ Trace 205911

----------- .xsession-errors (203004 sec old) ---------------------
 channel=java.nio.channels.SocketChannel[closed], socket=Socket[unconnected], local_address=0.0.0.0/0.0.0.0, local_port=0, remote_address=<null>, remote_port=0
    TCPConnectionManager::mainLoop::-1,TCPConnectionManager::access$900::-1,TCPConnectionManager$5::runSupport::-1,AEThread::run::-1
java.net.SocketException: Network is unreachable
	at sun.nio.ch.Net.connect(Native Method)
	at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:507)
	at com.aelitis.azureus.core.networkmanager.impl.tcp.TCPConnectionManager.addNewRequest(Unknown Source)
	at com.aelitis.azureus.core.networkmanager.impl.tcp.TCPConnectionManager.addNewOutboundRequests(Unknown Source)
	at com.aelitis.azureus.core.networkmanager.impl.tcp.TCPConnectionManager.mainLoop(Unknown Source)
	at com.aelitis.azureus.core.networkmanager.impl.tcp.TCPConnectionManager.access$900(Unknown Source)
	at com.aelitis.azureus.core.networkmanager.impl.tcp.TCPConnectionManager$5.runSupport(Unknown Source)
	at org.gudy.azureus2.core3.util.AEThread.run(Unknown Source)
DEBUG::Thu Aug 28 17:21:18 PDT 2008::com.aelitis.azureus.core.networkmanager.impl.tcp.TCPConnectionManager::addNewOutboundRequests::-1:
  ConnectDisconnectManager::address exception: full=/2001:0:d5c7:a2ca:0:ef7c:ab22:590:56949, hostname=2001:0:d5c7:a2ca:0:ef7c:ab22:590, port=56949, unresolved=false, full_sub=2001:0:d5c7:a2ca:0:ef7c:a
 channel=java.nio.channels.SocketChannel[closed], socket=Socket[unconnected], local_addr
...Too much output, ignoring rest...
--------------------------------------------------

Ok, the valuable info are:

** (gnome-system-monitor:27039): DEBUG: [22.909 load-graph.cpp:418 net_scale]
bak 1400202648 new_max 314572800 pow2 27 coef10 300

+ Trace 205916

Thanks a lot !


I'm a bit surprised because interface that are down are always acounted to avoid spikes and this kind of overflow. But in this case, it definitely looks like: sunddenly, one interface appears with none-zero stats (din=1050972945, dout=1400202648) which makes the little math crazy, it then overflows, wraps around and triggers the assertion.

Fixed in 2.23.91 + 2.22.4.
Thanks.