[solved] e1000e: Ethernet Port not seeing any carriers

Question

Hi, I really don't know what to do anymore.
My ethernet port, who is named enp0s25 by systemd, doesn't work. After boot it is down, after setting it up by either ifconfig or "ip link", it shows the following:
~ ifconfig
enp0s25: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 64:31:50:94:20:0a txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 20 memory 0xd4800000-d4820000
~ ip addr
4: enp0s25: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 64:31:50:94:20:0a brd ff:ff:ff:ff:ff:ff
Sometimes, the device is apparently sleeping, because
~ ethtool enp0s25
Settings for enp0s25:
Cannot get device settings: No such device
Cannot get wake-on-lan settings: No such device
Cannot get message level: No such device
Cannot get link status: No such device
But with "modprobe -r e1000e && modprobe e1000e" I can wake it up:
~ sudo ethtool enp0s25
Settings for enp0s25:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: Unknown!
Duplex: Unknown! (255)
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown (auto)
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: no
This is what dmesg says during boot and trying to use the port:
~ dmesg | grep e1000e
[ 4.369636] e1000e: Intel(R) PRO/1000 Network Driver - 2.1.4-k
[ 4.369640] e1000e: Copyright(c) 1999 - 2012 Intel Corporation.
[ 4.378023] e1000e 0000:00:19.0: setting latency timer to 64
[ 4.378104] e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[ 4.378139] e1000e 0000:00:19.0: irq 55 for MSI/MSI-X
[ 4.755103] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) 64:31:50:94:20:0a
[ 4.755107] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
[ 4.755158] e1000e 0000:00:19.0 eth0: MAC: 10, PHY: 11, PBA No: FFFFFF-0FF
[ 142.346831] e1000e 0000:00:19.0: irq 55 for MSI/MSI-X
[ 142.449982] e1000e 0000:00:19.0: irq 55 for MSI/MSI-X
[ 379.944965] e1000e 0000:00:19.0: irq 55 for MSI/MSI-X
The device works perfectly with a recent arch live cd and also in windows. I nowhere can find any errors or warnings concerning this. What can I do?
Oli
PS: I tried several boot parameters I found on the internet related to pci stuff, nothing helped. The device did work a couple of days ago but I can't recall if some kernel update or anything else broke it.
Last edited by janoliver (2013-03-10 22:16:55)

Answer 1

Thanks a billion, I've got exactly this problem too. I had to reboot laptop every time when pluging and unpluging  cable.
[ice@ice-thinker bin]$ ls /sys/class/net/ -l
total 0
lrwxrwxrwx 1 root root 0 May  8 20:10 enp0s25 -> ../../devices/pci0000:00/0000:00:19.0/net/enp0s25
lrwxrwxrwx 1 root root 0 May  8 19:55 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx 1 root root 0 May  8 19:55 wlp2s0 -> ../../devices/pci0000:00/0000:00:1c.4/0000:02:00.0/net/wlp2s0
echo on > /sys/bus/pci/devices/0000\:00\:19.0/power/control
this way can bring me network back.
reloading e1000e kernel module dose not work for me.
Last edited by shuaiming (2013-05-08 12:34:04)