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Sun, 27 Jan 2019 03:40:13 -0800


Yes, removing and re-adding the modules as you describe does at least
recover eno1 without rebooting. Still, hardly a solution for what was
intended to be a headless Plex server. This happens every time I start
an mpeg2 tv stream through my plex box which is only about a 20mbps
load. Sometimes it happens immediately sometimes it goes for nearly an

Also, I compiled a custom kernel with the patch described in post #40.
It had no effect on the dropouts for me. They are still occurring.

Host: Bobs-HTPC Kernel: 4.15.18+ x86_64 bits: 64 Console: tty 1 Distro: Ubuntu 
18.04.1 LTS

Device: desktop System: Hewlett-Packard product: HP EliteDesk 705 G1 DM serial: 
Mobo: Hewlett-Packard model: 225E serial: N/A BIOS: Hewlett-Packard v: L06 
v02.31 date: 08/31/2018

Card-1: Intel Wireless 7260 driver: iwlwifi
IF: wlp2s0 state: up mac: cc:3d:82:a7:bf:ed
Card-2: Broadcom Limited NetXtreme BCM5762 Gigabit Ethernet PCIe driver: tg3
IF: eno1 state: up speed: 100 Mbps duplex: full mac: ec:b1:d7:4c:2d:8e

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  14e4:1687 broadcom tg3 network driver disconnects under high load

Status in linux package in Ubuntu:
Status in linux package in Debian:

Bug description:
  The tg3 broadcom network driver that binds with chipset 5762 goes offline and 
unable to recover (even with tg3 watchdog timeout) when network transmit is 
under high load.  Call trace:

  When this happens, only a reboot would be able to fix it.  Sometimes,
  however, bringing the interface offline and online (via ifconfig)
  would recover networking.  I've also tested with the latest tg3 driver
  (dec 2014 version) and networking is still problematic.  I have also
  disabled TSO, GSO etc... with ethtool and the bug still surfaces.
  This bug may be related to the integrated Firmware.

  Here is the procedure to replicate the issue because it is hard to
  replicate it under moderate network load.

  1. Bootup a machine with a broadcom 5762 NIC (ie. HP DeskElite 705) using a 
Ubuntu/Kubunu Live CD 14.04-15.04.
  2. from another machine: start 5 sessions, repetitively copy (scp with public 
key authentication) a 70 meg file back and forth to the tg3 machine in each 
session. (not sure if this is necessary)
  3. create a 1GB file on the tg3 machine, with something like dd 
if=/dev/urandom of=/my/test/file bs=1024 count=$((1024*1000))
  4. from another machine: repetitively scp copy that 1GB file from the tg3 
machine. This can be done with something like:

  while [ 0 ]; do
  ???scp -i /my/scp/private.key u...@ip.of.tg3:/my/test/file /tmp

  Networking will mostly goes offline in about 10-30 minutes.

  WORKAROUND: Add udev rule to make the changes permanent in 
/etc/udev/rules.d/80-tg3-fix.rules :
  ACTION=="add", SUBSYSTEM=="net", ATTRS{vendor}=="0x14e4", 
ATTRS{device}=="0x1687", RUN+="/sbin/ethtool -K %k highdma off"

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-15-generic 3.19.0-15.15
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  ?/dev/snd/controlC1:  kubuntu    3748 F.... pulseaudio
  ?/dev/snd/controlC0:  kubuntu    3748 F.... pulseaudio
  CasperVersion: 1.360
  Date: Thu Apr 23 11:16:24 2015
  ?eth0      no wireless extensions.

  ?lo        no wireless extensions.
  LiveMediaBuild: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Hewlett-Packard HP EliteDesk 705 G1 MT
  ?PATH=(custom, no user)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi 
file=/cdrom/preseed/hostname.seed boot=casper maybe-ubiquity quiet splash ---
  ?Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not 
accessible: Permission denied
  ?No PulseAudio daemon running, or not running as session daemon.
  ?linux-restricted-modules-3.19.0-15-generic N/A
  ?linux-backports-modules-3.19.0-15-generic  N/A
  ?linux-firmware                             1.143

  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install) 10/22/2014
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: L06 v02.15
  dmi.board.asset.tag: 2UA5041TG4 2215
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: 2UA5041TG4
  dmi.chassis.type: 6
  dmi.chassis.vendor: Hewlett-Packard
dmi:bvnHewlett-Packard:bvrL06v02.15:bd10/22/2014:svnHewlett-Packard:pnHPEliteDesk705G1MT:pvr:rvnHewlett-Packard:rn2215:rvr:cvnHewlett-Packard:ct6:cvr: HP EliteDesk 705 G1 MT
  dmi.sys.vendor: Hewlett-Packard

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