kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

SOORAJ S, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1553044

** Package changed: linux-lts-wily (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1553044

Title:
  Ethernet Connection randomly disconnects after transmit queue 0 timed
  out

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Description of problem:

  Ethernet connection gets disconnected at random apparently without any
  reason. I have tried the following command to restart my ethernet
  connection, `sudo service network-manager restart` though it never
  solved the issue. Every time I have to restart my system to get the
  connection back.

  see: `http://askubuntu.com/questions/615423/ethernet-connection-
  randomly-disconnects-after-transmit-queue-0-timed-out`

  OBSERVATION: It happens more frequently when I make calls in skype or
  hangout. It seems that heavy usage of Ethernet is causing the
  disconnection. It happens in both 32bit and 64bit.

  Debug steps tried so far:

  I tried to change from `r8169` to `r8168` but never solved the
  problem, ethernet connection is unstable as before.

  $ lspci -nnk | grep -iA2 net
  06:00.0 Network controller [0280]: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
          Subsystem: Lenovo Device [17aa:30a1]
          Kernel driver in use: ath9k<br>
  07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 02)
          Subsystem: Lenovo Device [17aa:392e]
          Kernel driver in use: r8169

  $ dmesg -T | grep eth0
  [Sat May  2 19:52:37 2015] r8169 0000:07:00.0: eth0: RTL8102e at 0xffffc90000348000, 88:ae:1d:3a:ec:ff, XID 04e00000 IRQ 41
  [Sat May  2 19:52:45 2015] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
  [Sat May  2 19:52:51 2015] r8169 0000:07:00.0: eth0: link down
  [Sat May  2 19:52:51 2015] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
  [Sat May  2 19:52:51 2015] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
  [Sat May  2 19:52:56 2015] r8169 0000:07:00.0: eth0: link up
  [Sat May  2 19:52:56 2015] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
  [Sat May  2 20:09:01 2015] NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out
  [Sat May  2 20:09:01 2015] r8169 0000:07:00.0: eth0: link up
  [Sat May  2 20:09:13 2015] r8169 0000:07:00.0: eth0: link up
  [Sat May  2 20:09:19 2015] r8169 0000:07:00.0: eth0: link up
  [Sat May  2 20:09:31 2015] r8169 0000:07:00.0: eth0: link up
  [Sat May  2 20:10:13 2015] r8169 0000:07:00.0: eth0: link up
  [Sat May  2 20:10:55 2015] r8169 0000:07:00.0: eth0: link up
  [Sat May  2 20:12:07 2015] r8169 0000:07:00.0: eth0: link up
  [Sat May  2 20:13:49 2015] r8169 0000:07:00.0: eth0: link up

  After the event as shown in dmesg output my connection is lost.

  NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out

  As a Solution to the problem:

  I installed kernel version `3.2.0-83-generic` manually, it solved the
  problem and ethernet connection is perfect.

  Other kernels in which ethernet connection is stable: 3.2.0-98-generic, 3.2.0-83-generic
  Other kernels in which ethernet connection is not stable: 4.2.0-27-generic, 4.2.0-30-generic, 3.13.0-33-generic, 3.13.0-36-generic, 3.5.0-27-generic

  So it seems to be related to the kernel not with my hardware nor the
  driver.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-4.2.0-27-generic 4.2.0-27.32~14.04.1
  ProcVersionSignature: Ubuntu 4.2.0-27.32~14.04.1-generic 4.2.8-ckt1
  Uname: Linux 4.2.0-27-generic i686
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: i386
  CurrentDesktop: Unity
  Date: Fri Mar  4 11:55:30 2016
  InstallationDate: Installed on 2016-02-29 (3 days ago)
  InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release i386 (20160217.1)
  SourcePackage: linux-lts-wily
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1553044/+subscriptions