[Thinkpad T410] lvds panel always blank when booted with lid closed

Bug #1012800 reported by Seth Forshee on 2012-06-13
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Seth Forshee

Bug Description

When I boot this machine in a docking station with the lid closed, the lvds panel remains blank even when the output is activated. This is a result of the bios failing to initialize the LVDS register when the lid is closed.

Linux 3.5-rc1 includes patches to work around this by detecting that the LVDS register is uninitialized and use the default LVDS register value from the VBT table instead. However, an additional fix is also required to ignore the pipe select bit in this register. I'm currently working on getting this fix upstream.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-25-generic 3.2.0-25.40
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu9
Architecture: amd64
 /dev/snd/controlC0: sforshee 2554 F.... pulseaudio
 /dev/snd/controlC1: sforshee 2554 F.... pulseaudio
 Card hw:0 'Intel'/'HDA Intel at 0xf2620000 irq 45'
   Mixer name : 'Intel IbexPeak HDMI'
   Components : 'HDA:14f15069,17aa214c,00100302 HDA:80862804,17aa21b5,00100000'
   Controls : 26
   Simple ctrls : 8
 Card hw:1 'Headset'/'Logitech Logitech USB Headset at usb-0000:00:1a.0-1.5.6, full speed'
   Mixer name : 'USB Mixer'
   Components : 'USB046d:0a0b'
   Controls : 6
   Simple ctrls : 2
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6IHT43WW-1.18'
   Mixer name : 'ThinkPad EC 6IHT43WW-1.18'
   Components : ''
   Controls : 1
   Simple ctrls : 1
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Wed Jun 13 13:20:07 2012
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=fc52be4e-b2dc-480b-9340-79a8d5c9cb71
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: LENOVO 2516CTO
 PATH=(custom, user)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-25-generic root=UUID=d03b28ed-36cc-4d72-b349-f650242af24a ro quiet splash vt.handoff=7
 linux-restricted-modules-3.2.0-25-generic N/A
 linux-backports-modules-3.2.0-25-generic N/A
 linux-firmware 1.79
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-03-02 (102 days ago)
dmi.bios.date: 04/12/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 6IET83WW (1.43 )
dmi.board.name: 2516CTO
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:bvr6IET83WW(1.43):bd04/12/2012:svnLENOVO:pn2516CTO:pvrThinkPadT410:rvnLENOVO:rn2516CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2516CTO
dmi.product.version: ThinkPad T410
dmi.sys.vendor: LENOVO

Seth Forshee (sforshee) wrote :
tags: added: patch
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux - 3.5.0-3.3

linux (3.5.0-3.3) quantal-proposed; urgency=low

  [ Andy Whitcroft ]

  * [Config] enable CONFIG_MEMTEST=y
    - LP: #1004535
  * [Config] config-check: add support for a cut operation
  * [Config] enforcer -- switch to cut where appropriate

  [ Leann Ogasawara ]

  * Rebase to v3.5-rc5
  * [Config] Updateconfigs after rebase to v3.5-rc5

  [ Luis Henriques ]

  * SAUCE: ocfs2: Fix NULL pointer dereferrence in
    - LP: #1006012

  [ Seth Forshee ]

  * SAUCE: (drop after 3.5) drm/i915: ignore pipe select bit when checking
    for LVDS register initialization
    - LP: #1012800

  [ Upstream Kernel Changes ]

  * rebase to v3.5-rc5
    - LP: #1013183
    - LP: #1017017
    - LP: #884652
 -- Leann Ogasawara <email address hidden> Mon, 02 Jul 2012 06:41:58 -0700

Changed in linux (Ubuntu):
status: In Progress → Fix Released

The verification of this Stable Release Update has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regresssions.

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