If you need anything else, please let me know ahead of time.

Thanks,
Gene

On Wed, Feb 20, 2019 at 4:50 PM Kai-Heng Feng <email address hidden>
wrote:

> Ok, please attach dmesg when this issue happens, preferably under
> v5.0-rc7.
>
> The dmesg in comment #1 didn't record useful information.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1815808
>
> Title:
>   Thunderbolt Ethernet high-traffic exception
>
> Status in linux package in Ubuntu:
>   Incomplete
>
> Bug description:
>   Running iperf3 on Dell XP-15 with TB-10 Thunderbolt dock causes a
>   kernel exception and ethernet failure after about 30 seconds.
>
>   Easy to reproduce.  Connect to another machine via Gig-E and run
>   iperf3 in either direction until the problem occurs.  Should run 900+
>   Mb in either direction.  On one occasion I also lost the USB ports.
>   However the display continues to work.
>
>   <on my-machine>
>   # uname -a
>   Linux hauser 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC
> 2019 x86_64 x86_64 x86_64 GNU/Linux
>   # apt install iperf3
>   # iperf3 -s
>
>   <other machine>
>   # apt install iperf3
>   # iperf3 -c my-machine -t 1000         # send to my machine
>   # iperf3 -c my-machine -t 1000 -R      # receive data from my machine
>
>   When the bitrate drops to zero, look in syslog for the exception.
>
>   Note: Until recently the TB-10 Ethernet would not receive full speed.
>   (prior to -43 kernel) Did not see this problem before the Ethernet
>   performance increased.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 18.04
>   Package: linux-image-4.15.0-45-generic 4.15.0-45.48
>   ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
>   Uname: Linux 4.15.0-45-generic x86_64
>   NonfreeKernelModules: nvidia_modeset nvidia
>   ApportVersion: 2.20.9-0ubuntu7.5
>   Architecture: amd64
>   AudioDevicesInUse:
>    USER        PID ACCESS COMMAND
>    /dev/snd/controlC0:  gene       1994 F.... pulseaudio
>   CurrentDesktop: ubuntu:GNOME
>   Date: Wed Feb 13 13:54:28 2019
>   HibernationDevice: RESUME=UUID=d15ecb23-8691-42a1-9909-a56f934b536c
>   InstallationDate: Installed on 2018-11-19 (86 days ago)
>   InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
> (20180725)
>   MachineType: Dell Inc. XPS 15 9570
>   ProcFB: 0 inteldrmfb
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic
> root=UUID=a73e2d3e-5ce3-4130-917d-d116c1316153 ro net.ifnames=0
> mem_sleep_default=deep
>   RelatedPackageVersions:
>    linux-restricted-modules-4.15.0-45-generic N/A
>    linux-backports-modules-4.15.0-45-generic  N/A
>    linux-firmware                             1.173.3
>   SourcePackage: linux
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   dmi.bios.date: 12/25/2018
>   dmi.bios.vendor: Dell Inc.
>   dmi.bios.version: 1.7.0
>   dmi.board.name: 02MJVY
>   dmi.board.vendor: Dell Inc.
>   dmi.board.version: A00
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: Dell Inc.
>   dmi.modalias:
> dmi:bvnDellInc.:bvr1.7.0:bd12/25/2018:svnDellInc.:pnXPS159570:pvr:rvnDellInc.:rn02MJVY:rvrA00:cvnDellInc.:ct10:cvr:
>   dmi.product.family: XPS
>   dmi.product.name: XPS 15 9570
>   dmi.sys.vendor: Dell Inc.
>
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>