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[Launchpad Bug Tracker <1234896@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/1234896

Title:
  Flooded syslog "link up-link down" with Realtek r8169 network card
  1Gbps

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  1) Ubuntu release that I'm using:
  ~$ lsb_release -rd
  Description:	Ubuntu 12.04.3 LTS
  Release:	12.04
  ~$ uname -r
  3.8.0-31-generic
  2) The problem is in the network card driver that is bundled in the kernel
  3) Stable operation of the network interface adapter without errors in the log about link instability
  4) When the adapter is enabled to work on a 1Gbps speed it fulls the syslog with the following (MAC address is cleared from the log):
  Sep 30 23:18:59 zloster-P5L-MX kernel: [    0.731667] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
  Sep 30 23:18:59 zloster-P5L-MX kernel: [    0.731710] r8169 0000:01:01.0 (unregistered net_device): not PCI Express
  Sep 30 23:18:59 zloster-P5L-MX kernel: [    0.732842] r8169 0000:01:01.0 eth0: RTL8110s at 0xffffc90000636c00, **:**:**:**:**:**, XID 04000000 IRQ 21
  Sep 30 23:18:59 zloster-P5L-MX kernel: [    0.732846] r8169 0000:01:01.0 eth0: jumbo features [frames: 7152 bytes, tx checksumming: ok]
  Sep 30 23:19:00 zloster-P5L-MX NetworkManager[951]: <info> (eth0): new Ethernet device (driver: 'r8169' ifindex: 2)
  Sep 30 23:19:00 zloster-P5L-MX kernel: [    2.512648] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:19:00 zloster-P5L-MX kernel: [    2.512658] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:19:02 zloster-P5L-MX kernel: [    4.493310] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:19:54 zloster-P5L-MX kernel: [   56.039959] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:19:56 zloster-P5L-MX kernel: [   58.407322] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:20:17 zloster-P5L-MX kernel: [   79.923411] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:20:20 zloster-P5L-MX kernel: [   82.280077] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:20:36 zloster-P5L-MX kernel: [   98.569342] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:20:38 zloster-P5L-MX kernel: [  100.900203] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:21:00 zloster-P5L-MX kernel: [  122.717599] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:21:03 zloster-P5L-MX kernel: [  125.171832] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:21:20 zloster-P5L-MX kernel: [  142.910065] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:21:23 zloster-P5L-MX kernel: [  145.332603] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:21:38 zloster-P5L-MX kernel: [  160.536365] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:21:40 zloster-P5L-MX kernel: [  162.882715] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:22:04 zloster-P5L-MX kernel: [  186.944243] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:22:07 zloster-P5L-MX kernel: [  189.303738] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:22:28 zloster-P5L-MX kernel: [  210.167120] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:22:30 zloster-P5L-MX kernel: [  212.494430] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:22:42 zloster-P5L-MX kernel: [  224.707970] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:22:45 zloster-P5L-MX kernel: [  227.047190] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:22:57 zloster-P5L-MX kernel: [  239.573836] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:22:59 zloster-P5L-MX kernel: [  241.892899] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:23:13 zloster-P5L-MX kernel: [  255.034770] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:23:15 zloster-P5L-MX kernel: [  257.367732] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:23:34 zloster-P5L-MX kernel: [  275.987496] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:23:36 zloster-P5L-MX kernel: [  278.294405] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:23:46 zloster-P5L-MX kernel: [  288.813960] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:23:49 zloster-P5L-MX kernel: [  291.127126] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:24:01 zloster-P5L-MX kernel: [  303.003612] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:24:03 zloster-P5L-MX kernel: [  305.395800] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:24:15 zloster-P5L-MX kernel: [  317.568056] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:24:18 zloster-P5L-MX kernel: [  320.095280] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:24:32 zloster-P5L-MX kernel: [  334.837762] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:24:35 zloster-P5L-MX kernel: [  337.226631] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:24:46 zloster-P5L-MX kernel: [  348.395596] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:24:48 zloster-P5L-MX kernel: [  350.678414] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:25:02 zloster-P5L-MX kernel: [  364.414896] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:25:04 zloster-P5L-MX kernel: [  366.729921] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:25:16 zloster-P5L-MX kernel: [  378.245265] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:25:18 zloster-P5L-MX kernel: [  380.656621] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:25:30 zloster-P5L-MX kernel: [  392.605235] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:25:32 zloster-P5L-MX kernel: [  394.486987] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:25:42 zloster-P5L-MX kernel: [  403.968975] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:25:44 zloster-P5L-MX kernel: [  406.360043] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:25:55 zloster-P5L-MX kernel: [  417.946284] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:25:58 zloster-P5L-MX kernel: [  420.430015] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:26:11 zloster-P5L-MX kernel: [  433.108400] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:26:13 zloster-P5L-MX kernel: [  435.496057] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:26:24 zloster-P5L-MX kernel: [  446.587595] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:26:26 zloster-P5L-MX kernel: [  448.894864] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:26:39 zloster-P5L-MX kernel: [  461.859804] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:26:42 zloster-P5L-MX kernel: [  464.159959] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:26:52 zloster-P5L-MX kernel: [  474.022965] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:26:54 zloster-P5L-MX kernel: [  476.363662] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:27:08 zloster-P5L-MX kernel: [  490.375274] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:27:10 zloster-P5L-MX kernel: [  492.676155] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:27:22 zloster-P5L-MX kernel: [  503.990731] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:27:24 zloster-P5L-MX kernel: [  506.505544] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:27:35 zloster-P5L-MX kernel: [  517.789758] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:27:38 zloster-P5L-MX kernel: [  520.104166] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:27:50 zloster-P5L-MX kernel: [  532.023903] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:27:52 zloster-P5L-MX kernel: [  534.375422] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:28:03 zloster-P5L-MX kernel: [  545.293333] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:28:05 zloster-P5L-MX kernel: [  547.614996] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:28:17 zloster-P5L-MX kernel: [  559.933853] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:28:20 zloster-P5L-MX kernel: [  562.412652] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:28:32 zloster-P5L-MX kernel: [  574.736776] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:28:35 zloster-P5L-MX kernel: [  577.002394] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:28:46 zloster-P5L-MX kernel: [  588.706122] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:28:48 zloster-P5L-MX kernel: [  590.799223] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:29:12 zloster-P5L-MX kernel: [  614.503294] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:29:14 zloster-P5L-MX kernel: [  616.927674] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:29:30 zloster-P5L-MX kernel: [  632.897590] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:29:33 zloster-P5L-MX kernel: [  635.221694] r8169 0000:01:01.0 eth0: link up
  Sep 30 23:29:51 zloster-P5L-MX kernel: [  652.982673] r8169 0000:01:01.0 eth0: link down
  Sep 30 23:29:52 zloster-P5L-MX kernel: [  654.916429] r8169 0000:01:01.0 eth0: link up

  The output of lspci -k is:
  44:01:01.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller (rev 10)
  45-	Subsystem: CNet Technology Inc ProG-2000L
  46:	Kernel driver in use: r8169
  47:	Kernel modules: r8169

  There is a workaround if I explicitly set the link speed to 100Mbps.
  (sudo ethtool -s eth0 speed 100 duplex full autoneg on wol d). Then
  the syslog is clear and everything is working as expected. Also on 3.2
  and 3.5 kernels there is no such a problem.

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