[Bug 1872159] Re: Boot animation never finishes when external monitors (or just more than one) are connected

[Tim Wetzel]

Update as posted upstream at Plymouth:

Daniel, THANK YOU! I have applied Ubuntu Updates to the affected machines here, and then turned the splash screen back on. Knock on wood, the issue isn't happening any more.
Also: another bug is gone also, it seems: Ubuntu #1897185 regarding suspend during startup after entering the login password. This was occurring at approximately the same point in startup (anecdotal observation) as the spinning logo. I'm wondering if they were/are related?
Again, thank you!

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Title:
  Boot animation never finishes when external monitors (or just more
  than one) are connected

Status in Plymouth:
  Unknown
Status in plymouth package in Ubuntu:
  In Progress
Status in plymouth source package in Focal:
  Triaged
Status in plymouth source package in Groovy:
  In Progress

Bug description:
  I think this is a problem with the splash boot loader. This problem is
  not reproduced if using nosplash.

  I have installed 20.04 to this laptop. Thinkpad T480, i7, intel
  graphics.

  Clean install of 20.04 beta, not an upgrade.
  When booting from the install, the greeter screen is never reached if external monitors are connected at startup.
  I get the spinning ubuntu logo, and nothing more. I can not change to virtual terminals. The fsck step does not commence.

  In recovery mood, I can log in.

  With no external monitors attached, it works.

  I am used to having such problems with Nvidia graphics is involved,
  but this is not the case on this laptop. It has been happily running
  18.04.

  External displays are recognised if they are connected after login.

  Also, when I edit /etc/default/grub so that it reads
  GRUB_CMDLINE_LINUX_DEFAULT=""
  (that is, splash disabled)
  it works fine with two external monitors attached.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  ApportVersion: 2.20.11-0ubuntu26
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: skip
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Apr 11 13:58:19 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  DkmsStatus:
   acpi-call, 1.1.0, 5.4.0-21-generic, x86_64: installed
   tp_smapi, 0.43, 5.4.0-21-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
   Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller])
     Subsystem: Lenovo UHD Graphics 620 [17aa:225d]
  InstallationDate: Installed on 2020-04-10 (0 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
  MachineType: LENOVO 20L5S00F00
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic root=/dev/mapper/myvg-root ro
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/19/2020
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N24ET56W (1.31 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20L5S00F00
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrN24ET56W(1.31):bd02/19/2020:svnLENOVO:pn20L5S00F00:pvrThinkPadT480:rvnLENOVO:rn20L5S00F00:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
  dmi.product.family: ThinkPad T480
  dmi.product.name: 20L5S00F00
  dmi.product.sku: LENOVO_MT_20L5_BU_Think_FM_ThinkPad T480
  dmi.product.version: ThinkPad T480
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.101-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
  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+git20190815-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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