Network manager reports wrong ethernet speed

Bug #560432 reported by Phillip Susi on 2010-04-11
This bug affects 4 people
Affects Status Importance Assigned to Milestone
Fix Released
network-manager (Ubuntu)

Bug Description

Binary package hint: network-manager

After using ethtool to force the speed of eth0 back to 10 mbps on my realtek rtl8169 network-manager still says it is running at 100 mbps even though both ethtool and mii-tool say it is running at 10, and the led on my hub has changed to orange, which also indicates the link speed is only 10.

Bas232 (bas-heppen) wrote :

Same here, rtl8169 and network manager reports 100mbit, but ethtool eth0 shows 1000mbit.

Ubuntu 10.04 - NetworkManager gnome 0.8ubuntu3

Bas232 (bas-heppen) wrote :

And it is in fact 1000mbit, tested by transferring a very large file.

Phillip Susi (psusi) wrote :

I have a new system now with a different card, so it seems this is not hardware related. Further, it seems that the applet is simply caching the speed. If I shift the speed from 100 to 10, it still shows 100. If I restart nm-applet, it correctly shows 10. If I then shift the speed back to 100, the applet still shows 10. Unplugging and reconnecting the cable does not fix it either, the only way to get the applet to read the current speed is to restart the applet.

Phillip Susi (psusi) on 2011-02-27
Changed in network-manager (Ubuntu):
status: New → Triaged
importance: Undecided → Low
Changed in network-manager:
importance: Unknown → Medium
status: Unknown → New
D. Laszlo Sitzer (lazlo101) wrote :

I'm running Ubuntu 10.10 maverick with the network-manager 0.8.1+git.20100810t184654.ab580f4-0ubuntu2. My network card is a Intel 82577LM (e1000).

The "Connection Information" dialog shows me "Speed: 100Mb/s" while I look at my switch (or ethtool) it tells me the connection is "Speed: 1000Mb/s".

Thomas Hood (jdthood) wrote :

Is this bug still present in Precise?

Phillip Susi (psusi) wrote :

It seems this has been fixed in precise.

Changed in network-manager (Ubuntu):
status: Triaged → Fix Released
Thomas Hood (jdthood) wrote :


Changed in network-manager:
status: New → Fix Released
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