** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1881252
Title:
Ubuntu won't boot if external device plugged in
Status in linux package in Ubuntu:
Confirmed
Bug description:
Hi. When I start my system and have external monitor plugged either in
USB-C or HDMI, the system won't boot. It gets stuck just after the
grub before login screen. I have fresh new install of Ubuntu 20.04 LTS
on Lenove Thinkpad P53s laptop.
If I unplug the monitor and than plug them into system after I log in,
everything works fine. The after restart the same problem arises. I
have dual boot with windows, and I can log to windows with two
monitors plugged with no problem.
similar to this
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1876741
Linux michal-P53s 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30
UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 5.4.0-26.30-generic 5.4.30
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: michal 5978 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2020-05-28 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: LENOVO 20N6002WMC
NonfreeKernelModules: nvidia_modeset nvidia
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-26-generic
root=UUID=fe837102-832d-4cb5-946d-444c5f8e200d ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
RelatedPackageVersions:
linux-restricted-modules-5.4.0-26-generic N/A
linux-backports-modules-5.4.0-26-generic N/A
linux-firmware 1.187
Tags: focal
Uname: Linux 5.4.0-26-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 01/19/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N2IET83W (1.61 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20N6002WMC
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrN2IET83W(1.61):bd01/19/2020:svnLENOVO:pn20N6002WMC:pvrThinkPadP53s:rvnLENOVO:rn20N6002WMC:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad P53s
dmi.product.name: 20N6002WMC
dmi.product.sku: LENOVO_MT_20N6_BU_Think_FM_ThinkPad P53s
dmi.product.version: ThinkPad P53s
dmi.sys.vendor: LENOVO
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