my laptop display goes off while booting

[Karthikeyan]

        1.When the ubuntu is started in normal mode after some times the display goes off but all the other things like the login screen are opened but if any external display is attached then the display is working properly.
        2.The brightness adjusting also not working . I tried all those things to solve those problems in the internet but those are not working
        3.Currently i'm using the version12.04 but these problems occurred after the release of 11.04

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-29-generic-pae 3.2.0-29.46
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic-pae 3.2.24
Uname: Linux 3.2.0-29-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC888 Analog [ALC888 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: karthikeyan 2015 F.... pulseaudio
CRDA:
 country IN:
  (2402 - 2482 @ 40), (N/A, 20)
  (5170 - 5250 @ 40), (N/A, 20)
  (5250 - 5330 @ 40), (N/A, 20), DFS
  (5735 - 5835 @ 40), (N/A, 20)
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd8800000 irq 47'
   Mixer name : 'Intel Cantiga HDMI'
   Components : 'HDA:10ec0888,10250260,00100202 HDA:11c11040,10250260,00100200 HDA:80862802,80860101,00100000'
   Controls : 40
   Simple ctrls : 19
Date: Sat Aug 18 01:18:23 2012
HibernationDevice: RESUME=UUID=7aa7a1a0-7172-4dd7-b265-1320c98fd512
InstallationMedia: This
MachineType: Acer Aspire 4736
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic-pae root=UUID=dc34ff47-faa3-46c8-bf8d-4ae965c71755 ro quiet splash acpi_backlight=vendor /boot/grub/menu.lst . Execute: vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-29-generic-pae N/A
 linux-backports-modules-3.2.0-29-generic-pae N/A
 linux-firmware 1.79
SourcePackage: linux
StagingDrivers: zram
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/18/2010
dmi.bios.vendor: Acer
dmi.bios.version: V2.08
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire 4736
dmi.board.vendor: Acer
dmi.board.version: V2.08
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.08
dmi.modalias: dmi:bvnAcer:bvrV2.08:bd01/18/2010:svnAcer:pnAspire4736:pvrV2.08:rvnAcer:rnAspire4736:rvrV2.08:cvnAcer:ct10:cvrV2.08:
dmi.product.name: Aspire 4736
dmi.product.version: V2.08
dmi.sys.vendor: Acer

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.6 kernel[0] (Not a kernel in the daily directory) and install both the linux-image and linux-image-extra .deb packages.

Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. Please only remove that one tag and leave the other tags. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text.

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6-rc2-quantal/

[Launchpad Janitor (janitor)]

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