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
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1881252
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.