Public bug reported:
With the kernel packets in version 4.15.0-43 (the ones I'm running to report
this bug), I can plug my Dell WD15 dock station normally on the USB-C connector
of my laptop, before or after booting it: everything works fine.
When I upgrade to the latest kernel (i.e. install linux-XXX-4.15.0.44 with
XXX=image, headers, modules and modules-extra), my laptop cannot boot ubuntu
with the WD15 dock plugged in. It boots normally without WD15, can use normally
a USB-C memory stick plugged in the same connector, but hangs whenever the WD15
dock is plugged in: black screen, no reaction to the laptop keyboard even when
caps lock is pressed (the corresponding LED does not turn on), must reboot with
a long action on the power-off button.
The problem is really specific to 4.15.0.44 and is not present in 4.15.0.43.
Whit the new version installed, choosing the old kernel in the GRUB menu gives
a working system. I now un-installed the new version and it works well.
Enclosed file: Portion of /var/log/kern.log showing a boot sequence with
WD15 plugged. It begins to differ from the sequence with WD15 unplugged
at line 685 (looking for usb devices), contains a warning at line 850
and a OOPS at line 951
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-43-generic 4.15.0-43.46
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: gdm 1248 F.... pulseaudio
delannoy 1712 F.... pulseaudio
Date: Thu Jan 31 15:42:55 2019
InstallationDate: Installed on 2017-09-20 (497 days ago)
InstallationMedia: Ubuntu-GNOME 16.04.3 LTS "Xenial Xerus" - Release amd64
(20170801)
MachineType: Dell Inc. Latitude 5480
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic
root=UUID=4266b673-814e-442f-b0fb-f65e55c0c0ab ro quiet splash vt.handoff=1
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not
accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-4.15.0-43-generic N/A
linux-backports-modules-4.15.0-43-generic N/A
linux-firmware 1.173.3
SourcePackage: linux
UpgradeStatus: Upgraded to bionic on 2018-05-15 (261 days ago)
dmi.bios.date: 11/12/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.13.0
dmi.board.name: 0T96NR
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.13.0:bd11/12/2018:svnDellInc.:pnLatitude5480:pvr:rvnDellInc.:rn0T96NR:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Latitude
dmi.product.name: Latitude 5480
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1814117
Title:
System hangs when a Dell WD15 dock station is plugged
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