[Regression] From 3.16.0-45 to -47: Intel IGB Tx Unit Hang network adapter reset problem prevents stable network connection

[Dennis Gnad]

Regression from at least:

linux-image-3.16.0-45-generic=3.16.0-45.60~14.04.1

to:

linux-image-3.16.0-47-generic=3.16.0-47.63~14.04.1

On an Intel Xeon Workstation with an Intel IGB Gigabit Ethernet Adapter, the network connection is never stable, as the Adapter regularly resets itself due to multiple Tx Unit Hangs (see attached kernel log)

When booting the old kernel, the system works flawless again.

I can not use "ubuntu-bug linux" because it has no options and wants to report only for the currently running kernel, which has no network connection.

For some reason I can only attach one file. I chose to attach the kern.log - the version.log shows only the currently running kernel, and I can paste the lspci log later if required.

> lsb_release -rd
Description: Ubuntu 14.04.3 LTS
Release: 14.04

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.2 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-rc8-unstable/

[B. (b-deactivatedaccount-deactivatedaccount)]

Same bug as https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1492146