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I have an Arris cable modem, and my laptop has a JMC250 PCI Express Gigabit Ethernet Controller. I'm unable to connect to its wired network either with NetworkManager, Wicd, or the command-line on Debian Stable. I have tried also running a Porteus (Slackware based) LiveCD, but the result was the same.

I have tried also many times unloading the jme module and reloading it, with no options, and also with the options force_pseudohp=1, no_pseudohp=1, and no_extplug=1, but to no avail.

I have also tried turning off the rfkill switch, because I can connect to the Wifi without any problems using NetworkManager.

Here is the log from when trying to connect with the NetworkManager:

Feb 5 15:38:50 localhost NetworkManager[2225]: <info> enable requested (sleeping: no enabled: no) Feb 5 15:38:50 localhost NetworkManager[2225]: <info> waking up and re-enabling... Feb 5 15:38:50 localhost NetworkManager[2225]: <info> (wlan0): now managed Feb 5 15:38:50 localhost NetworkManager[2225]: <info> (wlan0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Feb 5 15:38:50 localhost NetworkManager[2225]: <info> (wlan0): bringing up device. Feb 5 15:38:50 localhost NetworkManager[2225]: <info> (wlan0): deactivating device (reason 'managed') [2] Feb 5 15:38:50 localhost NetworkManager[2225]: <info> (eth0): now managed Feb 5 15:38:50 localhost NetworkManager[2225]: <info> (eth0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Feb 5 15:38:50 localhost NetworkManager[2225]: <info> (eth0): preparing device. Feb 5 15:38:50 localhost NetworkManager[2225]: <info> (eth0): deactivating device (reason 'managed') [2]

The log from Wicd (which uses standard command-line tools):

2014/02/05 15:35:50 :: Executing /etc/network/if-down.d/upstart with params 2014/02/05 15:35:50 :: /etc/network/if-down.d/upstart returned 0 2014/02/05 15:35:50 :: Executing /etc/network/if-down.d/wpasupplicant with params 2014/02/05 15:35:50 :: /etc/network/if-down.d/wpasupplicant returned 0 2014/02/05 15:35:50 :: attempting to set hostname with dhclient 2014/02/05 15:35:50 :: using dhcpcd or another supported client may work better 2014/02/05 15:35:50 :: /sbin/dhclient -v -r wlan0 2014/02/05 15:35:50 :: ifconfig wlan0 0.0.0.0 2014/02/05 15:35:50 :: /sbin/ip route flush dev wlan0 2014/02/05 15:35:50 :: ifconfig wlan0 down 2014/02/05 15:35:50 :: ifconfig wlan0 up 2014/02/05 15:35:50 :: Executing /etc/network/if-post-down.d/wireless-tools with params 2014/02/05 15:35:50 :: /etc/network/if-post-down.d/wireless-tools returned 0 2014/02/05 15:35:50 :: Executing /etc/network/if-post-down.d/wpasupplicant with params 2014/02/05 15:35:50 :: /etc/network/if-post-down.d/wpasupplicant returned 0 2014/02/05 15:35:50 :: wpa_cli -i wlan0 terminate 2014/02/05 15:35:50 :: Executing /etc/network/if-down.d/upstart with params 2014/02/05 15:35:50 :: /etc/network/if-down.d/upstart returned 0 2014/02/05 15:35:50 :: Executing /etc/network/if-down.d/wpasupplicant with params 2014/02/05 15:35:50 :: /etc/network/if-down.d/wpasupplicant returned 0 2014/02/05 15:35:50 :: attempting to set hostname with dhclient 2014/02/05 15:35:50 :: using dhcpcd or another supported client may work better 2014/02/05 15:35:50 :: /sbin/dhclient -v -r eth0 2014/02/05 15:35:50 :: ifconfig eth0 0.0.0.0 2014/02/05 15:35:50 :: /sbin/ip route flush dev eth0 2014/02/05 15:35:50 :: ifconfig eth0 down 2014/02/05 15:35:50 :: ifconfig eth0 up 2014/02/05 15:35:50 :: Executing /etc/network/if-post-down.d/wireless-tools with params 2014/02/05 15:35:50 :: /etc/network/if-post-down.d/wireless-tools returned 0 2014/02/05 15:35:50 :: Executing /etc/network/if-post-down.d/wpasupplicant with params 2014/02/05 15:35:50 :: /etc/network/if-post-down.d/wpasupplicant returned 0 2014/02/05 15:35:50 :: wpa_cli -i eth0 terminate 2014/02/05 15:35:50 :: found lastused in configuration True 2014/02/05 15:35:50 :: Executing /etc/network/if-pre-up.d/ethtool with params 2014/02/05 15:35:50 :: /etc/network/if-pre-up.d/ethtool returned 0 2014/02/05 15:35:50 :: Executing /etc/network/if-pre-up.d/wireless-tools with params 2014/02/05 15:35:50 :: /etc/network/if-pre-up.d/wireless-tools returned 0 2014/02/05 15:35:50 :: Executing /etc/network/if-pre-up.d/wpasupplicant with params 2014/02/05 15:35:50 :: /etc/network/if-pre-up.d/wpasupplicant returned 0 2014/02/05 15:35:50 :: Putting interface down 2014/02/05 15:35:50 :: ifconfig eth0 down 2014/02/05 15:35:50 :: Releasing DHCP leases... 2014/02/05 15:35:50 :: attempting to set hostname with dhclient 2014/02/05 15:35:50 :: using dhcpcd or another supported client may work better 2014/02/05 15:35:50 :: /sbin/dhclient -v -r eth0 2014/02/05 15:35:50 :: Setting false IP... 2014/02/05 15:35:50 :: ifconfig eth0 0.0.0.0 2014/02/05 15:35:50 :: Stopping wpa_supplicant 2014/02/05 15:35:50 :: wpa_cli -i eth0 terminate 2014/02/05 15:35:50 :: Flushing the routing table... 2014/02/05 15:35:50 :: /sbin/ip route flush dev eth0 2014/02/05 15:35:50 :: Putting interface up... 2014/02/05 15:35:50 :: ifconfig eth0 up 2014/02/05 15:35:52 :: Running DHCP with hostname localhost 2014/02/05 15:35:52 :: attempting to set hostname with dhclient 2014/02/05 15:35:52 :: using dhcpcd or another supported client may work better 2014/02/05 15:35:52 :: /sbin/dhclient -v eth0 2014/02/05 15:35:52 :: Internet Systems Consortium DHCP Client 4.2.2 2014/02/05 15:35:52 :: Copyright 2004-2011 Internet Systems Consortium. 2014/02/05 15:35:52 :: All rights reserved. 2014/02/05 15:35:52 :: For info, please visit https://www.isc.org/software/dhcp/ 2014/02/05 15:35:52 :: 2014/02/05 15:35:52 :: Listening on LPF/eth0/80:ee:73:1f:6d:47 2014/02/05 15:35:52 :: Sending on LPF/eth0/80:ee:73:1f:6d:47 2014/02/05 15:35:52 :: Sending on Socket/fallback 2014/02/05 15:35:52 :: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8 2014/02/05 15:36:00 :: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 14 2014/02/05 15:36:14 :: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 15 2014/02/05 15:36:29 :: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 17 2014/02/05 15:36:46 :: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 2014/02/05 15:36:53 :: No DHCPOFFERS received. 2014/02/05 15:36:53 :: No working leases in persistent database - sleeping. 2014/02/05 15:36:53 :: DHCP connection failed 2014/02/05 15:36:53 :: exiting connection thread 2014/02/05 15:36:53 :: Sending connection attempt result dhcp_failed 2014/02/05 15:36:53 :: ifconfig eth0 2014/02/05 15:36:53 :: ifconfig wlan0 2014/02/05 15:36:53 :: Forced disconnect on 2014/02/05 15:36:53 :: iwconfig wlan0 2014/02/05 15:36:53 :: Executing /etc/network/if-down.d/upstart with params 2014/02/05 15:36:53 :: /etc/network/if-down.d/upstart returned 0 2014/02/05 15:36:53 :: Executing /etc/network/if-down.d/wpasupplicant with params 2014/02/05 15:36:53 :: /etc/network/if-down.d/wpasupplicant returned 0 2014/02/05 15:36:53 :: attempting to set hostname with dhclient 2014/02/05 15:36:53 :: using dhcpcd or another supported client may work better 2014/02/05 15:36:53 :: /sbin/dhclient -v -r wlan0 2014/02/05 15:36:53 :: ifconfig wlan0 0.0.0.0 2014/02/05 15:36:53 :: /sbin/ip route flush dev wlan0 2014/02/05 15:36:53 :: ifconfig wlan0 down 2014/02/05 15:36:53 :: ifconfig wlan0 up 2014/02/05 15:36:53 :: Executing /etc/network/if-post-down.d/wireless-tools with params 2014/02/05 15:36:53 :: /etc/network/if-post-down.d/wireless-tools returned 0 2014/02/05 15:36:53 :: Executing /etc/network/if-post-down.d/wpasupplicant with params 2014/02/05 15:36:53 :: /etc/network/if-post-down.d/wpasupplicant returned 0 2014/02/05 15:36:53 :: wpa_cli -i wlan0 terminate 2014/02/05 15:36:53 :: Executing /etc/network/if-down.d/upstart with params 2014/02/05 15:36:53 :: /etc/network/if-down.d/upstart returned 0 2014/02/05 15:36:53 :: Executing /etc/network/if-down.d/wpasupplicant with params 2014/02/05 15:36:53 :: /etc/network/if-down.d/wpasupplicant returned 0 2014/02/05 15:36:53 :: attempting to set hostname with dhclient 2014/02/05 15:36:53 :: using dhcpcd or another supported client may work better 2014/02/05 15:36:53 :: /sbin/dhclient -v -r eth0 2014/02/05 15:36:53 :: ifconfig eth0 0.0.0.0 2014/02/05 15:36:53 :: /sbin/ip route flush dev eth0 2014/02/05 15:36:53 :: ifconfig eth0 down 2014/02/05 15:36:53 :: ifconfig eth0 up 2014/02/05 15:36:53 :: Executing /etc/network/if-post-down.d/wireless-tools with params 2014/02/05 15:36:53 :: /etc/network/if-post-down.d/wireless-tools returned 0 2014/02/05 15:36:53 :: Executing /etc/network/if-post-down.d/wpasupplicant with params 2014/02/05 15:36:53 :: /etc/network/if-post-down.d/wpasupplicant returned 0 2014/02/05 15:36:53 :: wpa_cli -i eth0 terminate

Some other info:

$ sudo ethtool eth0 Settings for eth0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Speed: 10Mb/s Duplex: Half Port: MII PHYAD: 1 Transceiver: internal Auto-negotiation: on Supports Wake-on: pg Wake-on: g Current message level: 0x000020c6 (8390) probe link rx_err tx_err hw Link detected: no $ sudo nm-tool NetworkManager Tool State: disconnected - Device: eth0 ----------------------------------------------------------------- Type: Wired Driver: jme State: unavailable Default: no HW Address: 80:EE:73:1F:6D:47 Capabilities: Carrier Detect: yes Wired Properties Carrier: off
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2 Answers 2

Reset to default
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The ethtool output says it all:

Link detected: no

Either the network cable, the interface itself, or what you're connecting to, is damaged/broken. The fact that you've even tried multiple OSs, and they all behave the same, supports this.

Basically this isn't a software issue.

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  • Thanks a lot for your answer! Could it be a modem configuration problem? I reset it yesterday, but the default settings could have some problems, I think... I could configure it through the Wifi. Commented Feb 6, 2014 at 13:45
  • configuration problem? doubt it, but it is technically possible. Just start ruling things out. Replace cable, replace laptop, replace modem. See which fixes it. Commented Feb 6, 2014 at 17:32
  • OK, thank you! Although I don't have any more laptops, modems or cables :( I'll see what I can do... Commented Feb 6, 2014 at 17:36
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Thanks God I insisted on this :) Taken from the Ubuntu forums:

sudo ethtool -s eth0 autoneg off speed 100 duplex full

Results after running this command:

Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: Not reported Advertised pause frame use: No Advertised auto-negotiation: No Speed: 100Mb/s Duplex: Full Port: MII PHYAD: 1 Transceiver: internal Auto-negotiation: off Supports Wake-on: pg Wake-on: g Current message level: 0x000020c6 (8390) probe link rx_err tx_err hw Link detected: yes
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  • Glad this solved your issue, but it usually means something is failing. Like the signal quality is so poor that it isn't capable of negotiating a speed properly. I'd still advise trying to at least swap out the ethernet cable as it's the most likely culprit. Though you might be able to confirm this without replacing anything by looking at the "errors" counters of ifconfig. Commented Feb 12, 2014 at 7:30

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