[Bug 883820] Re: splash screen doesn't display on kernels newer than 2.6.31-22 => can not enter disk decryption password

Sun Oct 30 13:27:55 UTC 2011

On Sun, Oct 30, 2011 at 12:25:08PM -0000, G H wrote:
> I'm using Ubuntu on my notebook. My disk contains four partitions: two
> windows partitions, a /boot partition for ubuntu, and an (fully
> encrypted) partition containing the rest of my ubuntu system. The
> encryption was set up using the alternate install CD of Ubuntu 9.04 (so
> it's LUKS).

> Trying to boot with any kernel newer than 2.6.31-22 fails, because the
> splash screen (where I am supposed to enter my disk
> encryption/decryption password) is not displayed. This also holds for
> booting in recovery mode. Typing the password blindly (without prompt)
> does not yield any result.

2.6.31 is a rather old kernel - predating Ubuntu 10.04 LTS.  Using the
2.6.31 kernel with the Ubuntu 11.10 userspace, you get the splash screen
with no problems?

How does the splash screen look?  From the details in your bug report, it
looks like it should be a text-only splash screen (because your /proc/fb is
empty).

The lspci info shows:

01:00.0 VGA compatible controller [0300]: nVidia Corporation G98 [GeForce 9300M GS] [10de:06e9] (rev a1) (prog-if 00 [VGA controller])
	Subsystem: CLEVO/KAPOK Computer Device [1558:0802]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 16 bytes
	Interrupt: pin A routed to IRQ 9
	Region 0: Memory at d2000000 (32-bit, non-prefetchable) [size=16M]
	Region 1: Memory at c0000000 (64-bit, prefetchable) [size=256M]
	Region 3: Memory at d0000000 (64-bit, non-prefetchable) [size=32M]
	Region 5: I/O ports at 9000 [size=128]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: <access denied>
	Kernel modules: nvidiafb

Despite this showing an 'nvidiafb' association, no framebuffer driver
appears to be loaded when you use 2.6.31.

> During the boot process with new kernels, the screen flashes one time
> (as if the kernel was trying to change the display mode/screen
> resolution), but then falls back to text mode display. I'm not sure if
> this has got something to do with the problem, but since I can't rule
> that out, I included the info.

Especially since you say this happens even in rescue mode, it seems likely
that this is an incompatibility between your video card and the nouveau
driver used by default in newer kernels.  I'll reassign this bug to the
kernel package.

You could test whether booting without nouveau works by adding a 'blacklist
nouveau' line to /etc/modprobe.d/blacklist-framebuffer.conf.

-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                    http://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org

** Package changed: plymouth (Ubuntu) => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/883820

Title:
  splash screen doesn't display on kernels newer than 2.6.31-22 => can
  not enter disk decryption password

Status in “linux” package in Ubuntu:
  New

Bug description:
  I'm using Ubuntu on my notebook. My disk contains four partitions: two
  windows partitions, a /boot partition for ubuntu, and an (fully
  encrypted) partition containing the rest of my ubuntu system. The
  encryption was set up using the alternate install CD of Ubuntu 9.04
  (so it's LUKS).

  Trying to boot with any kernel newer than 2.6.31-22 fails, because the
  splash screen (where I am supposed to enter my disk
  encryption/decryption password) is not displayed. This also holds for
  booting in recovery mode. Typing the password blindly (without prompt)
  does not yield any result.

  During the boot process with new kernels, the screen flashes one time
  (as if the kernel was trying to change the display mode/screen
  resolution), but then falls back to text mode display. I'm not sure if
  this has got something to do with the problem, but since I can't rule
  that out, I included the info.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: plymouth 0.8.2-2ubuntu28
  ProcVersionSignature: Ubuntu 2.6.31-22.65-generic
  Uname: Linux 2.6.31-22-generic i686
  ApportVersion: 1.23-0ubuntu3
  Architecture: i386
  Date: Sun Oct 30 13:04:55 2011
  DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 001 Device 002: ID 0bda:8189 Realtek Semiconductor Corp. RTL8187B Wireless 802.11g 54Mbps Network Adapter
   Bus 001 Device 003: ID 5986:0200 Acer, Inc OrbiCam
  MachineType: wortmann M7X0SU
  ProcCmdLine: root=/dev/mapper/lvm--vg-lvm--lv--system ro quiet splash
  ProcEnviron:
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB:

  ProcKernelCmdLine: root=/dev/mapper/lvm--vg-lvm--lv--system ro quiet splash
  SourcePackage: plymouth
  TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
  UpgradeStatus: Upgraded to oneiric on 2011-10-29 (1 days ago)
  dmi.bios.date: 11/07/0892
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 6.00
  dmi.board.asset.tag: 1234567890
  dmi.board.name: M7X0SU
  dmi.board.vendor: wortmann
  dmi.board.version: Bottom
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: SiS
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd11/07/0892:svnwortmann:pnM7X0SU:pvrRev.A1:rvnwortmann:rnM7X0SU:rvrBottom:cvnSiS:ct1:cvrN/A:
  dmi.product.name: M7X0SU
  dmi.product.version: Rev. A1
  dmi.sys.vendor: wortmann

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