Comment 9 for bug 1701499

Unfortunately that turned out to be a fluke. I had two freezes on 4.11.12, and just a freeze a minute ago on fresh 4.13.rc3 installed from http://kernel.ubuntu.com/~kernel-ppa/mainline/. No panics though.

I noticed all these freezes have a few things in common:
- they happen only when the dock is plugged in during logging into Ubuntu session; they don't happen if I plug in the dock after logging in.
- they happen AFTER the ethernet connection through the dock is dropped and BEFORE it is reestablished after login - when the freeze happens, the network manager shows I have only wifi connection. If the system goes past reestablishing ethernet connection through the dock, everything works smoothly. Also suspend/resume with the dock connected is fine.

Additionally, the dock seems to operate properly before I login. I never ever had a panic or freeze before logging into my account. The network manager icon shows the ethernet connection is active at the login screen. However, this connection is dropped immediately after logging in (why?) and re-established.

I also noticed some rare instabilities in ethernet connectivity - sometimes it just drops the connection in the middle of the day and needs replugging (reconnecting from network manager doesn't work in this case).

BTW: I updated the dock firmware to the most recent version from Dell. I had to use Windows for that. But this didn't help.