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.
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1701499
Title:
System often freezes or panics if I log in with Dell Dock WD15
connected
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