I just realized this is the USB-C logic crashing in the kernel:
Jul 21 20:31:20 volfe kernel: Call Trace:
Jul 21 20:31:20 volfe kernel: ucsi_altmode_update_active+0xab/0xf0 [typec_ucsi]
Jul 21 20:31:20 volfe kernel: ucsi_register_port+0x2c6/0x3c0 [typec_ucsi]
Jul 21 20:31:20 volfe kernel: ucsi_init+0xd2/0x1c0 [typec_ucsi]
Jul 21 20:31:20 volfe kernel: process_one_work+0x1eb/0x3b0
Jul 21 20:31:20 volfe kernel: worker_thread+0x4d/0x400
Jul 21 20:31:20 volfe kernel: kthread+0x104/0x140
Jul 21 20:31:20 volfe kernel: ? process_one_work+0x3b0/0x3b0
Jul 21 20:31:20 volfe kernel: ? kthread_park+0x90/0x90
Jul 21 20:31:20 volfe kernel: ret_from_fork+0x35/0x40
So it looks like a kernel bug.
** Package changed: mutter (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1887914
Title:
Partial freeze if booting with USB-C dock attached
Status in linux package in Ubuntu:
New
Bug description:
When booting my Lenovo E490 with the Lenovo Powered USB-C Travel Hub
(a kind of dock) already attached, the machine crashes after entering
password into the graphical login interface. More precisely the login
does not complete (in a reasonable time frame) and I cannot switch to
another virtual terminal. Some menus can be selected, but there is no
action (e.g. reboot) and I have to do a hard shutdown (pressing the
power button for 4 sec.). The log files show a kernel oops. When
attaching the dock after login the system seems to work normally.
I do have the latest displaylink drivers installed
(www.displaylink.com).
Attached is a log file snippet.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2019-03-25 (483 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64
(20190210)
Package: mutter 3.36.3-0ubuntu0.20.04.1
PackageArchitecture: amd64
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
Tags: focal
Uname: Linux 5.4.0-40-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev remote sambashare sudo wireshark
_MarkForUpload: True
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