backlight does not turn back on after resume

[fringd]

to reproduce:

suspend my samsung series 9 with i915 graphics, core i5...

then resume.

expected result: backlight turns on

current result: laptop resumes, and does stuff, but you can't see anything (except very faintly in the right light). you can type in your password blind to get past the the screen lock, and then the laptop will respond to brightness up/down keys, which wakes the backlight out of its stupor.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.95-0ubuntu1
Architecture: amd64
CompizPlugins: [core,composite,opengl,decor,mousepoll,imgpng,snap,vpswitch,gnomecompat,blur,grid,compiztoolbox,place,regex,wall,move,unitymtgrabhandles,resize,animation,fade,session,workarounds,expo,scale,unityshell]
CompositorRunning: compiz
Date: Fri Mar 23 23:48:55 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120315)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 900X3B/900X4B
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-generic root=UUID=8b047424-e3f2-40e6-8106-85282ceba541 ro i915_enable_rc6=1 i915_enable_fbc=1 lvds_downclock=1 quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/02/2012
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: P03AAH
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 900X3B/900X4B
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: FAB1
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP03AAH:bd02/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn900X3B/900X4B:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn900X3B/900X4B:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
dmi.product.name: 900X3B/900X4B
dmi.product.version: 0.1
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
version.compiz: compiz 1:0.9.7.2-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Brad Figg (brad-figg)]

Thank you for taking the time to file a bug report on this issue.

However, given the number of bugs that the Kernel Team receives during any development cycle it is impossible for us to review them all. Therefore, we occasionally resort to using automated bots to request further testing. This is such a request.

We have noted that there is a newer version of the development kernel than the one you last tested when this issue was found. Please test again with the newer kernel and indicate in the bug if this issue still exists or not.

You can update to the latest development kernel by simply running the following commands in a terminal window:

    sudo apt-get update
    sudo apt-get dist-upgrade

If the bug still exists, change the bug status from Incomplete to Confirmed. If the bug no longer exists, change the bug status from Incomplete to Fix Released.

If you want this bot to quit automatically requesting kernel tests, add a tag named: bot-stop-nagging.

 Thank you for your help, we really do appreciate it.

[penalvch (penalvch)]

fringd, could you please provide the full computer model as noted on your sticker (ex. NP900X3B-A01UK)?

[fringd (fringd)]

will try to remember to look and post it tonight when I'm back at home.

On Sun, Aug 4, 2013 at 8:06 PM, Christopher M. Penalver <
<email address hidden>> wrote:

> fringd, could you please provide the full computer model as noted on
> your sticker (ex. NP900X3B-A01UK)?
>
> ** Tags removed: backlight kernel-request-3.2.0-22.35 pm-tools power
> ** Tags added: needs-full-computer-model needs-upstream-testing
> regression-potential
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/963651
>
> Title:
> backlight does not turn back on after resume
>
> To manage notifications about this bug go to:
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