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Message #174344
[Bug 1574933] Re: Big uploads blocked when upgrading from 14.04 to 16.04 -- TCP MTU Discovery not properly set.
apport information
** Tags added: apport-collected xenial
** Description changed:
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.
+ 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
** Attachment added: "AlsaInfo.txt"
https://bugs.launchpad.net/bugs/1574933/+attachment/4647353/+files/AlsaInfo.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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References