Could you try booting with “initcall_debug earlycon=efifb debug ignore_loglevel” added and with “quiet splash” removed? Anything on the screen?
-- 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/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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1881252/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
