[Bug 939283] Re: [hybrid-gfx] Blank screen on boot due to failure to follow primary framebuffer

[Chris Halse Rogers]

Note that any time that Plymouth blocks waiting for input (eg: prompting
for a cryptsetup passphrase) this looks like the system has hung during
the boot.

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https://bugs.launchpad.net/bugs/939283

Title:
  [hybrid-gfx] Blank screen on boot due to failure to follow primary
  framebuffer

Status in “plymouth” package in Ubuntu:
  New

Bug description:
  Plymouth sometimes fails to display on this hybrid graphics laptop.
  This appears to be because the ordering of which drm device (i915,
  radeon) comes up first is not deterministic.  Plymouth appears to bind
  to the first device which comes up.  If the radeon comes up first,
  this results in no output, as the radeon card isn't connected to any
  output devices.

  The kernel is aware of this, and switches the VTs to the i915's
  framebuffer when it appears (if it comes up second).

  X always comes up on the right device (ie: the Intel).

  The attached dmesg comes from a boot where radeon loaded first and
  plymouth was not displayed.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: plymouth 0.8.2-2ubuntu28
  ProcVersionSignature: Ubuntu 3.2.0-17.26-generic 3.2.6
  Uname: Linux 3.2.0-17-generic x86_64
  ApportVersion: 1.92-0ubuntu1
  Architecture: amd64
  Date: Tue Feb 21 13:22:32 2012
  DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120128)
  MachineType: Dell Inc. Dell System Inspiron N4110
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-17-generic root=/dev/mapper/sda3_crypt ro rootflags=subvol=@ quiet splash vt.handoff=7
  ProcFB:
   0 radeondrmfb
   1 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-17-generic root=/dev/mapper/sda3_crypt ro rootflags=subvol=@ quiet splash vt.handoff=7
  SourcePackage: plymouth
  TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/20/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: Q4E343
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X01
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd09/20/2011:svnDellInc.:pnDellSystemInspironN4110:pvr:rvnDellInc.:rnQ4E343:rvrX01:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System Inspiron N4110
  dmi.sys.vendor: Dell Inc.

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