[Bug 1878421] [NEW] (If external monitor connected) Hang on boot while showing ubuntu boot screen with animation

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Hi,

i try to use external monitor on my dell G5 2019 (5590). works on ubuntu
18.4 (after reboot) using prime-select nvidia.

did this on 20.4 (prime-select + reboot because logoff/login again still
don't work) and it hang on boot while showing ubuntu bootscreen with
animation (not stopped, but also response to esc-key to show terminal-
output) on the monitor (need to switch off). booted again where monitor
is configured to other input, boot works, i see it in preferences dialog
as second monitor, but if i configure input on monitor i have no
signal..


anything i can try?

regards Frank

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: GNOME-Flashback:GNOME
Date: Wed May 13 15:21:08 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation UHD Graphics 630 (Mobile) [8086:3e9b] (prog-if 00 [VGA controller])
   Subsystem: Dell UHD Graphics 630 (Mobile) [1028:08ea]
 NVIDIA Corporation TU117M [GeForce GTX 1650 Mobile / Max-Q] [10de:1f91] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Dell TU117M [GeForce GTX 1650 Mobile / Max-Q] [1028:08ea]
InstallationDate: Installed on 2020-04-27 (16 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 27c6:530c Shenzhen Goodix Technology Co.,Ltd. Fingerprint Reader
 Bus 001 Device 002: ID 0c45:671f Microdia Integrated_Webcam_HD
 Bus 001 Device 004: ID 8087:0aaa Intel Corp. 
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. G5 5590
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic root=UUID=7c9113b7-ca65-4c46-9435-f5d2b73bab72 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/07/2020
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.12.0
dmi.board.name: 0KW84T
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.12.0:bd02/07/2020:svnDellInc.:pnG55590:pvr:rvnDellInc.:rn0KW84T:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: GSeries
dmi.product.name: G5 5590
dmi.product.sku: 08EA
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: plymouth (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal ubuntu
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(If external monitor connected) Hang on boot while showing ubuntu boot screen with animation
https://bugs.launchpad.net/bugs/1878421
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