bisect result: lp:~ubuntu-kernel/ubuntu/+source/linux/+git/unstable
shows this commit.
I built using the mainline config-4.15.0-041500rc2-generic file and
accepted default options. I also had to apply
ff6fa2d396b0476988c749664f600b1e177bcf9b in order to get the neighboring
commits to build.
it does appear to stop the flicker, but also seems to cause the boot
failure.
commit 77a113c1ac1458856ca8e82a9046efff8ca87f09
Author: Andy Whitcroft <a...@canonical.com>
Date: Wed Apr 16 19:40:57 2014 +0100
UBUNTU: SAUCE: vt -- maintain bootloader screen mode and content until vt
switch
Introduce a new VT mode KD_TRANSPARENT which endevours to leave the current
content of the framebuffer untouched. This allows the bootloader to insert
a graphical splash and have the kernel maintain it until the OS splash
can take over. When we finally switch away (either through programs like
plymouth or manually) the content is lost and the VT reverts to text mode.
BugLink: http://bugs.launchpad.net/bugs/1308685
Signed-off-by: Andy Whitcroft <a...@canonical.com>
:040000 040000 b0f28f7ecaeaf8037832299ee421886dcd9dfc25
3e051b4e05da82a1184bdb45a71d3317e8c74445 M drivers
:040000 040000 22bdb68e3e9757318cf57f010231c1af7db61cc1
ce199b29dcc261c74b4b2cdfd26dc3993ecbd970 M include
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
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.
---
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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