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[Bug 855764] Re: modeswitch (flash to black) on intel between grub and plymouth


Steve Langasek, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:

where VERSION-NUMBER is the version number of the kernel you tested. For example:

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:

If the mainline kernel does not fix this bug, please add the following tags:

As well, please remove the tag:

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your

** Tags added: bios-outdated-1.40

** Tags added: needs-upstream-testing

** Changed in: linux (Ubuntu)
   Importance: Medium => Low

** Changed in: linux (Ubuntu)
       Status: Triaged => Incomplete

** Changed in: linux (Ubuntu)
     Assignee: Andy Whitcroft (apw) => (unassigned)

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  modeswitch (flash to black) on intel between grub and plymouth

Status in The Ubuntu Flicker-Free Boot Project:
Status in “linux” package in Ubuntu:

Bug description:
  Even after ensuring I have an up-to-date grub installed with the
  hwcheck license fix (verified from the grub shell at boot time), I get
  a brief clear-to-black between the purple grub screen and the start of

  Possibly relevant details:

   - plymouth is being started from the initramfs, not from the root system (cryptsetup)
   - I have grub configured to show the boot menu automatically, instead of the default of auto-booting to the first option
   - a plymouth debug log does show that plymouth is successfully using the drm backend, not the framebuffer backend; so this doesn't appear to be plymouth racing the kernel driver initialization.

  Possibly relevant plymouth-debug.log snippets:

  [main.c]                            check_for_consoles:checking for consoles
  [main.c]                            check_for_consoles:There are currently 0 text displays
  [main.c]                redirect_standard_io_to_device:redirecting stdio to /dev/tty7
  [main.c]                        initialize_environment:initialized minimal work environment
  [main.c]                     attach_to_running_session:creating new terminal session
  [./plugin.c]                                create_backend:creating renderer backend for device /dev/dri/card0
  [./plugin.c]                                   load_driver:Attempting to load driver 'i915'
  [ply-terminal.c]                             ply_terminal_open:trying to open terminal '/dev/tty7'
  [ply-terminal.c]                 ply_terminal_look_up_geometry:looking up terminal text geometry
  [ply-terminal.c]                 ply_terminal_look_up_geometry:terminal is now 160x50 text cells
  [./plugin.c]                         ply_renderer_head_new:Creating 1280x800 renderer head
  [main.c]              add_pixel_displays_from_renderer:Adding displays for 1 heads
  [main.c]           plymouth_should_show_default_splash:checking if plymouth should show default splash
  [main.c]                           show_default_splash:Showing splash screen

  Colin says this is unlikely to be a bug in grub given that hwcheck is
  succeeding, so reporting this against the kernel.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-11-generic 3.0.0-11.18
  ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
  Uname: Linux 3.0.0-11-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu1
  Architecture: amd64
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC0:  vorlon     3682 F.... pulseaudio
   /dev/snd/pcmC0D0p:   vorlon     3682 F...m pulseaudio
   Card hw:0 'Intel'/'HDA Intel at 0xf2520000 irq 44'
     Mixer name	: 'Intel IbexPeak HDMI'
     Components	: 'HDA:14f15069,17aa2155,00100302 HDA:80862804,17aa21b5,00100000'
     Controls      : 12
     Simple ctrls  : 6
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6QHT30WW-1.11'
     Mixer name	: 'ThinkPad EC 6QHT30WW-1.11'
     Components	: ''
     Controls      : 1
     Simple ctrls  : 1
   Simple mixer control 'Console',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Date: Wed Sep 21 10:12:55 2011
  HibernationDevice: RESUME=UUID=f6ab3c43-61b4-4af7-bf03-fa3b147a1de0
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 003: ID 0a5c:217f Broadcom Corp. Bluetooth Controller
  MachineType: LENOVO 3249CTO
   PATH=(custom, user)
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-11-generic root=/dev/mapper/hostname-root ro quiet splash vt.handoff=7
   linux-restricted-modules-3.0.0-11-generic N/A
   linux-backports-modules-3.0.0-11-generic  N/A
   linux-firmware                            1.60
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: Upgraded to oneiric on 2011-06-27 (86 days ago)
  dmi.bios.date: 08/23/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6QET52WW (1.22 )
  dmi.board.name: 3249CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6QET52WW(1.22):bd08/23/2010:svnLENOVO:pn3249CTO:pvrThinkPadX201:rvnLENOVO:rn3249CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 3249CTO
  dmi.product.version: ThinkPad X201
  dmi.sys.vendor: LENOVO

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