I live with this bug for more than a year and I do not know any kernel
version where this bug did not occur.
As the bug only occur from time to time I checked how often it trigger with the
normal ubuntu kernel. During 20 restarts the bug was triggered 3 times.
After installing kernel 4.2.0-040200.201508301530 I restarted my server again
20 times and the bug occur 2 times.
As a side note when the bug occur the network indicator need multiple
seconds longer to show up after bootup in the notification area.
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1492824
Title:
Intel NIC ignore sometimes all received messages
Status in linux package in Ubuntu:
Confirmed
Bug description:
From time to time my home server can not communicate over the LAN. The IP
address and gateway is set, but no other PC in the network is reachable.
My network consist normally of the router and the server connected over LAN
and my notebooks (1 windows, 1 linux) over WLAN. As I am was not sure if this
was a bug in my server or the router, I bought a switch with port mirroring. I
placed it between my router and server.
The first observation was that with this new network structure the bug still
occurs.
I mirrored the ports connected with my server and router and analyse
it with my linux notebook connected to the switch. When trying to ping
my router from the server I saw traffic from both devices, but the
ping program says always host unreachable.
I plugged my notebook into another non-mirrored port and tested if I can
access my router. Everything worked fine(Ping, internet). So the bug seems an
issue of my server.
After more testing and looking up different information over eth0, I realized
that my server sends messages but did not receive any. The ifconfig output is
attached. The weird thing is that received, dropped messages and overrun are 0,
although messages were transmitted to the server. Visible by the blinking leds
at the switch and the traffic of the mirrored ports.
The loopback interface is working, so ping localhost works as usual.
A workaround for the bug is to deactivate the network in the network
manager, waiting some seconds and activate it again. After it
everything works as it should. An reboot of the server works also. So
this is hardly problem of the LAN cables.
The wake on lan function is activated for eth0 with the ethtools. The
bug also occur when I start the server with a WOL message. The server
starts, but you can not connect to it (ping, ssh, ....). By the way
this is the time when this bug becomes really annoying.
If required I can provide a syslog from today with a server start at
the morning, where everything works fine, and a start in the afternoon
where the server is not reachable. As it contain private data I will
not post it public.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-63-generic 3.13.0-63.103
ProcVersionSignature: Ubuntu 3.13.0-63.103-generic 3.13.11-ckt25
Uname: Linux 3.13.0-63-generic x86_64
NonfreeKernelModules: wl tbs6982fe tbs6680fe tbs6923fe tbs6985se tbs6928se
tbs6982se tbs6991fe tbs6618fe tbs6983fe tbs6922fe tbs6928fe tbs6991se tbs6290fe
ApportVersion: 2.14.1-0ubuntu3.12
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: mat 2795 F.... pulseaudio
/dev/snd/controlC0: mat 2795 F.... pulseaudio
/dev/snd/pcmC0D8p: mat 2795 F...m pulseaudio
CurrentDesktop: Unity
Date: Sun Sep 6 19:56:59 2015
InstallationDate: Installed on 2014-03-30 (525 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140329)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-63-generic
root=UUID=afa0260e-e08d-416c-82a4-c9ae2e30d45b ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-63-generic N/A
linux-backports-modules-3.13.0-63-generic N/A
linux-firmware 1.127.15
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/25/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.80
dmi.board.name: Z87E-ITX
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP1.80:bd06/25/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ87E-ITX:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
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