8086:2a42 [Packard Bell EasyNote TK36] No LCD backlight on notebook

[JimBo]

After update to Natty, when the system boots, grub's menu is ok, but after, lcd is getting black (even in console and recovery mode).
This bug occurs with kernel 2.6.38-8 (and also with proposed version : 2.6.38-9 - I tried), but not with last version : 2.6.35-28 !

WORKAROUND: Boot with old kernel version (2.6.35-28). Add the following to /etc/rc.local and reboot :
setpci -s 00:02.0 F4.B=0

BIOS update http://www.packardbell.co.uk/pb/en/GB/content/download

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: yann 1267 F.... pulseaudio
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd6700000 irq 45'
   Mixer name : 'Intel Cantiga HDMI'
   Components : 'HDA:10ec0272,1025048a,00100001 HDA:80862802,80860101,00100000'
   Controls : 23
   Simple ctrls : 12
Date: Mon May 2 17:02:20 2011
HibernationDevice: RESUME=UUID=8da84708-574c-4e73-bae5-f8321d27d70a
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MachineType: Packard Bell EasyNote TK36
ProcEnviron:
 LANGUAGE=fr_FR:en
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=f249cc0e-2ce4-4a7e-8204-620957d94896 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-8-generic N/A
 linux-backports-modules-2.6.38-8-generic N/A
 linux-firmware 1.52
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-04-30 (2 days ago)
dmi.bios.date: 08/17/2010
dmi.bios.vendor: Packard Bell
dmi.bios.version: V1.03
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: SJV52_MV
dmi.board.vendor: Packard Bell
dmi.board.version: V1.03
dmi.chassis.type: 10
dmi.chassis.vendor: Packard Bell
dmi.chassis.version: V1.03
dmi.modalias: dmi:bvnPackardBell:bvrV1.03:bd08/17/2010:svnPackardBell:pnEasyNoteTK36:pvrV1.03:rvnPackardBell:rnSJV52_MV:rvrV1.03:cvnPackardBell:ct10:cvrV1.03:
dmi.product.name: EasyNote TK36
dmi.product.version: V1.03
dmi.sys.vendor: Packard Bell

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[penalvch (penalvch)]

JimBo, 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:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.13-rc1

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:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

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 understanding.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]