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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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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:
Incomplete
Bug description:
When I boot a Dell Inspiron 7559 with an external monitor connected to
the hdmi port I get a crash on bootup. I can see the following stack
trace in journalctl:
syslog contains:
kernel: Missing switch case (6) in intel_prepare_dp_ddi_buffers
Description: Ubuntu 18.04 LTS
Release: 18.04
linux-image-4.15.0-20-generic:
Installed: 4.15.0-20.21
Candidate: 4.15.0-20.21
Version table:
*** 4.15.0-20.21 500
500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
100 /var/lib/dpkg/status
Linux exposure 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15
UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
3) What you expected to happen
I expected the laptop to boot to the login screen.
4) What happened instead
I see a blank screen after grub and have to hard power off the laptop.
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"
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