kernel-packages team mailing list archive

[Eric Carlier <ericcarlier@xxxxxxx>]

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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