My e1000e device is em1. It has this rather strange behavior on
Fedora's 3.8.1 (although 3.7.something did the same thing, I believe):
$ ip link show dev em1
6: em1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast
state DOWN qlen 1000
link/ether f0:de:f1:59:f6:c9 brd ff:ff:ff:ff:ff:ff
$ strace -e socket,ioctl ethtool em1
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
Settings for em1:
ioctl(3, SIOCETHTOOL, 0x7fffa6c554d0) = -1 ENODEV (No such device)
Cannot get device settings: No such device
ioctl(3, SIOCETHTOOL, 0x7fffa6c554d0) = -1 ENODEV (No such device)
Cannot get wake-on-lan settings: No such device
ioctl(3, SIOCETHTOOL, 0x7fffa6c554d0) = -1 ENODEV (No such device)
Cannot get message level: No such device
ioctl(3, SIOCETHTOOL, 0x7fffa6c554d0) = -1 ENODEV (No such device)
Cannot get link status: No such device
No data available
+++ exited with 75 +++
$ sudo tcpdump -i em1
tcpdump: em1: SIOETHTOOL(ETHTOOL_GTSO) ioctl failed: No such device
A sufficient number of rmmod/modprobe cycles will make it work.
This is, perhaps, helpful:
$ sudo ip link set dev em1 name foobar
RTNETLINK answers: Device or resource busy
$ sudo ip link set dev em1 down
$ sudo ip link set dev em1 name foobar
$ sudo ethtool foobar
Settings for foobar:
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
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: no
$ sudo ip link set dev foobar name em1
$ sudo ethtool em1
Settings for em1:
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
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: no
$
This bug (?) isn't a show-stopper, but it's rather annoying. I
suspect a core networking bug, not an e1000e bug, but I cc'd the e1000
people just in case.
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