Public bug reported:
The following bug is reproducible with linux-image-3.13.0-53-generic,
but not with linux-image-3.13.0-52-generic.
When I unplug the Ethernet cable from my laptop, I get the following messages
in /var/log/kern.log after a few seconds (~20s):
May 22 13:59:36 host kernel: [ 5498.465626] pciehp 0000:00:1c.5:pcie04: Card
not present on Slot(5)
May 22 13:59:36 host kernel: [ 5498.478755] pciehp 0000:00:1c.5:pcie04: Card
present on Slot(5)
May 22 13:59:36 host kernel: [ 5498.598744] pciehp 0000:00:1c.5:pcie04: Device
0000:06:00.0 already exists at 0000:06:00, cannot hot-add
May 22 13:59:36 host kernel: [ 5498.598755] pciehp 0000:00:1c.5:pcie04: Cannot
add device at 0000:06:00
May 22 13:59:36 host kernel: [ 5498.718646] atl1c 0000:06:00.0: MAC state
machine can't be idle since disabled for 10ms second
Then, when I re-plug the cable, eth0 does not appear in network manager; there
is no message in kern.log.
eth0 does not appear in ifconfig -a
$ ifconfig -a
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:11586 errors:0 dropped:0 overruns:0 frame:0
TX packets:11586 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:16392353 (16.3 MB) TX bytes:16392353 (16.3 MB)
wlan0 Link encap:Ethernet HWaddr 48:5d:xx:xx:xx:xx
inet addr:192.168.xx.xx Bcast:192.168.xx.xx Mask:255.255.255.0
inet6 addr: fe80::xxxx:xxxx:xxxx:xxxx/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19 errors:0 dropped:0 overruns:0 frame:0
TX packets:66 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2651 (2.6 KB) TX bytes:12364 (12.3 KB)
I tried to reinitialize networking with the following:
sudo modprobe -r atl1c
sudo modprobe atl1c
Still no eth0 and no message in kern.log
I tried
$ sudo ifup eth0
Ignoring unknown interface eth0=eth0.
Same symptoms occur when I reboot my router, and its Ethernet interface
becomes temporarily unavailable.
Only way I found to restore eth0 was rebooting.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1457863
Title:
interface eth0 disappears after network cable unplug/re-plug
Status in linux package in Ubuntu:
New
Bug description:
The following bug is reproducible with linux-image-3.13.0-53-generic,
but not with linux-image-3.13.0-52-generic.
When I unplug the Ethernet cable from my laptop, I get the following messages
in /var/log/kern.log after a few seconds (~20s):
May 22 13:59:36 host kernel: [ 5498.465626] pciehp 0000:00:1c.5:pcie04: Card
not present on Slot(5)
May 22 13:59:36 host kernel: [ 5498.478755] pciehp 0000:00:1c.5:pcie04: Card
present on Slot(5)
May 22 13:59:36 host kernel: [ 5498.598744] pciehp 0000:00:1c.5:pcie04:
Device 0000:06:00.0 already exists at 0000:06:00, cannot hot-add
May 22 13:59:36 host kernel: [ 5498.598755] pciehp 0000:00:1c.5:pcie04:
Cannot add device at 0000:06:00
May 22 13:59:36 host kernel: [ 5498.718646] atl1c 0000:06:00.0: MAC state
machine can't be idle since disabled for 10ms second
Then, when I re-plug the cable, eth0 does not appear in network manager;
there is no message in kern.log.
eth0 does not appear in ifconfig -a
$ ifconfig -a
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:11586 errors:0 dropped:0 overruns:0 frame:0
TX packets:11586 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:16392353 (16.3 MB) TX bytes:16392353 (16.3 MB)
wlan0 Link encap:Ethernet HWaddr 48:5d:xx:xx:xx:xx
inet addr:192.168.xx.xx Bcast:192.168.xx.xx Mask:255.255.255.0
inet6 addr: fe80::xxxx:xxxx:xxxx:xxxx/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19 errors:0 dropped:0 overruns:0 frame:0
TX packets:66 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2651 (2.6 KB) TX bytes:12364 (12.3 KB)
I tried to reinitialize networking with the following:
sudo modprobe -r atl1c
sudo modprobe atl1c
Still no eth0 and no message in kern.log
I tried
$ sudo ifup eth0
Ignoring unknown interface eth0=eth0.
Same symptoms occur when I reboot my router, and its Ethernet
interface becomes temporarily unavailable.
Only way I found to restore eth0 was rebooting.
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