Hey AaronMa,
What do you mean with "found that LID close until the BIOS logo show, unless 
the laptop will shut down."?

So you tested using the HDMI cable directly attached to the laptop and
everything worked even with something attached to the thunderbolt port?
Which kind of docking station are you using?

With that said I've tried the latest BIOS:

BIOS Information
        Vendor: LENOVO
        Version: N2OET42W (1.29 )
        Release Date: 01/20/2020
        Address: 0xE0000
        Runtime Size: 128 kB
        ROM Size: 32 MB
        Characteristics:
                PCI is supported
                PNP is supported
                BIOS is upgradeable
                BIOS shadowing is allowed
                Boot from CD is supported
                Selectable boot is supported
                EDD is supported
                3.5"/720 kB floppy services are supported (int 13h)
                Print screen service is supported (int 5h)
                8042 keyboard services are supported (int 9h)
                Serial services are supported (int 14h)
                Printer services are supported (int 17h)
                CGA/mono video services are supported (int 10h)
                ACPI is supported
                USB legacy is supported
                BIOS boot specification is supported
                Targeted content distribution is supported
                UEFI is supported
        BIOS Revision: 1.29
        Firmware Revision: 1.22

And results are the same: if something is attached to thunderbolt, no
way to see even grub, if nothing is attached (and LID is closed) then I
see grub loading on the external monitor but I don't get GDM.

What do you mean exactly with "BIOS should be default setting with
optimized enabled"?

Thanks!

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https://bugs.launchpad.net/bugs/1876741

Title:
  Lenovo X1 boot crash with HDMI cable attached and laptop lid closed

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hey everyone,
  just upgraded to 20.04 in my Lenovo X1 Carbon laptop and found myself in 
really big troubles.

  I always started my laptop pressing the power button and then closing
  the laptop lid, because I'm using an external HDMI display. This
  worked always well with Ubuntu 19.10. With 20.04 the system crash.

  These are the actions that reproduce the problem:

  1 - Boot the system, pressing the power button and closing the laptop lid 
with an external HDMI display attached to the laptop;
  2 - See on the external HDMI display the boot progress: BIOS loading and then 
grub not appearing;
  3 - Listen to the fans that are about to make the laptop lift;
  4 - Press the power button to force off the laptop;

  At this point the only way to have everything back is:

  1 - Detach any external device;
  2 - Detach the power cable;
  3 - Wait 3 seconds or more;
  4 - Open the laptop lid;
  5 - Attach the power cable;
  6 - Press the power button;

  Without doing exactly as I written the laptop will not boot up, even
  if I force power off, after starting it again, after the BIOS display,
  the screen goes blank and the fans lift.

  NOTE 1: I already disabled secure boot in the BIOS, and also selected
  discrete graphics for the display (otherwise I'm not able to even
  start X);

  NOTE 2: the scenario is exactly the same with nvidia-driver-435 and
  nvidia-driver-440;

  NOTE 3: if I leave the laptop lid open, everything is just fine;

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.4.0-28-generic 5.4.0-28.32
  ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
  Uname: Linux 5.4.0-28-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  rasca      2750 F.... pulseaudio
   /dev/snd/controlC1:  rasca      2750 F.... pulseaudio
   /dev/snd/controlC0:  rasca      2750 F.... pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Mon May  4 16:24:47 2020
  InstallationDate: Installed on 2019-12-10 (146 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  MachineType: LENOVO 20QVCTO1WW
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-28-generic 
root=UUID=c61df9cc-bd36-4ed2-8f52-de114bbf3fc3 ro rd.driver.blacklist=nouveau
  RelatedPackageVersions:
   linux-restricted-modules-5.4.0-28-generic N/A
   linux-backports-modules-5.4.0-28-generic  N/A
   linux-firmware                            1.187
  SourcePackage: linux
  UpgradeStatus: Upgraded to focal on 2020-04-28 (6 days ago)
  dmi.bios.date: 03/24/2020
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N2OET43W (1.30 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20QVCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0T08861 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN2OET43W(1.30):bd03/24/2020:svnLENOVO:pn20QVCTO1WW:pvrThinkPadX1Extreme2nd:rvnLENOVO:rn20QVCTO1WW:rvrSDK0T08861WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.family: ThinkPad X1 Extreme 2nd
  dmi.product.name: 20QVCTO1WW
  dmi.product.sku: LENOVO_MT_20QV_BU_Think_FM_ThinkPad X1 Extreme 2nd
  dmi.product.version: ThinkPad X1 Extreme 2nd
  dmi.sys.vendor: LENOVO

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