kernel-packages team mailing list archive

[Abram Hindle <1574933@xxxxxxxxxxxxxxxxxx>]

apport information

** Attachment added: "IwConfig.txt"
   https://bugs.launchpad.net/bugs/1574933/+attachment/4647356/+files/IwConfig.txt

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https://bugs.launchpad.net/bugs/1574933

Title:
  Big uploads blocked when upgrading from 14.04 to 16.04 -- TCP MTU
  Discovery not properly set.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After upgrading 14.04 to 16.04 I couldn't send big emails with
  attachments, I couldn't use google drive. Sometimes lowering the MTU
  worked.

  I was able to get uploading of large files working again by playing
  with MTU probing and discovery:

  echo 1 > /proc/sys/net/ipv4/tcp_mtu_probing
  echo 1024 > /proc/sys/net/ipv4/tcp_base_mss

  Basic MTU related issues should be setup by default, perhaps
  interfaces need to updated during upgrade?

  Ubuntu 4.4.0-21.37-generic 4.4.6

  Without enabling tcp_mtu_probling I couldn't upload large files over HTTPS and SMTP w/ TLS.
  --- 
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/dsp', '/dev/snd/by-path', '/dev/snd/hwC0D3', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CurrentDesktop: GNOME-Flashback:Unity
  DistroRelease: Ubuntu 16.04
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2011-12-09 (1599 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: LENOVO 4294CTO
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=2e608b01-21da-49d9-a0fa-ff80b90454a8 ro pcie_aspm=force i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 quiet splash nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw vt.handoff=7
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-21-generic N/A
   linux-backports-modules-4.4.0-21-generic  N/A
   linux-firmware                            1.157
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  Tags:  xenial
  Uname: Linux 4.4.0-21-generic x86_64
  UpgradeStatus: Upgraded to xenial on 2016-04-25 (0 days ago)
  UserGroups: adm admin cdrom dialout docker libvirtd lpadmin netdev plugdev sambashare video
  _MarkForUpload: True
  dmi.bios.date: 10/18/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET54WW (1.24 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4294CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8DET54WW(1.24):bd10/18/2011:svnLENOVO:pn4294CTO:pvrThinkPadX220Tablet:rvnLENOVO:rn4294CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4294CTO
  dmi.product.version: ThinkPad X220 Tablet
  dmi.sys.vendor: LENOVO

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