** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
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https://bugs.launchpad.net/bugs/1768139
Title:
Kernel crash when booting laptop with hdmi monitor connected
Status in linux package in Ubuntu:
Triaged
Bug description:
When I boot a Dell Inspiron 7559 with an external monitor connected to
the hdmi port, it usually shows only a blank screen after grub and I
have to hard power off the laptop. The issue is present when the bios
and grub are in mirror mode to both screens. I can see the following
stack trace in journalctl:
syslog contains:
kernel: Missing switch case (6) in intel_prepare_dp_ddi_buffers
This occurs with both a Dell U2515H using an HDMI cord, and a HP
Compaq LA2405wg connected via HDMI-to-DVI adapter.
WORKAROUND: Keep the monitor unplugged until the Ubuntu loading screen
shows up.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-20-generic 4.15.0-20.21
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 30 17:22:20 2018
InstallationDate: Installed on 2018-04-28 (2 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: linux-signed
UpgradeStatus: No upgrade log present (probably fresh install)
This is a fresh install. I have modified grub defaults to include
"acpi_osi=!Windows 2015" But I tested without the acpi_osi parameter and see
the same issue although the system now randomly crashes later on.
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ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: apatterson 1965 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=UUID=7b947b8e-de50-4ab6-b7f3-254a5dea924a
InstallationDate: Installed on 2018-04-28 (9 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: Dell Inc. Inspiron 7559
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic
root=UUID=77f1cfec-1fe4-4201-9a91-9f00a5d7782b ro quiet splash
"acpi_osi=!Windows 2015"
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
RelatedPackageVersions:
linux-restricted-modules-4.15.0-20-generic N/A
linux-backports-modules-4.15.0-20-generic N/A
linux-firmware 1.173
Tags: bionic wayland-session
Uname: Linux 4.15.0-20-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo wireshark
_MarkForUpload: True
dmi.bios.date: 09/26/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.2.5
dmi.board.name: 0H0CC0
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnDellInc.:bvr1.2.5:bd09/26/2017:svnDellInc.:pnInspiron7559:pvr1.2.5:rvnDellInc.:rn0H0CC0:rvrA00:cvnDellInc.:ct10:cvrNotSpecified:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 7559
dmi.product.version: 1.2.5
dmi.sys.vendor: Dell Inc.
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