Display black but back-lit after resuming from stand-by or hibernation

[isync]

Since dist-upgrading to Ubuntu 11.04 my Lenovo U160 does not fully come back from stand-by or hibernation.

The display remains black although the back-light is on, similar to bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/608907/
The same issue arises when you leave the machine alone for a while: it first starts the screensaver but after a while it will also go into more power-saving routines. So if you leave it alone for 20 minutes or so, the problem is the same as when you manually switch it to stand-by or hibernation.

Ubuntu 11.04 on 2.6.38-8-generic

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: wl
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,imgpng,gnomecompat,regex,place,move,session,mousepoll,vpswitch,wall,resize,grid,snap,animation,workarounds,expo,ezoom,staticswitcher,fade,scale]
CompositorRunning: compiz
DRM.card0.DP.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1366x768
 edid-base64: AP///////wAw5L8CAAAAAAAUAQOAGg54CgWVlVlWjCggUFQAAAABAQEBAQEBAQEBAQEBAQEBHBtWhFAABzASFBMAAJAQAAAbAAAAAAAAAAAAAAAAAAAAAAAAAAAA/gBMRyBEaXNwbGF5CiAgAAAA/gBMUDExNldIMi1UTE4xAN0=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Sun Oct 2 13:51:30 2011
DistUpgraded: Log time: 2011-08-26 14:22:55.620140
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 5.100.82.38+bdcom, 2.6.35.8-i915patch, i686: installed
 bcmwl, 5.100.82.38+bdcom, 2.6.38-8-generic, i686: installed
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:3920]
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: LENOVO 08946MG
ProcEnviron:
 LANGUAGE=de_DE:en_GB:en
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=691e3fbe-b46f-4aef-8081-03cd27d1152f ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to natty on 2011-08-26 (36 days ago)
dmi.bios.date: 05/10/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 33CN14WW
dmi.board.asset.tag: Tag 12345
dmi.board.name: MoutCook
dmi.board.vendor: LENOVO
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnLENOVO:bvr33CN14WW:bd05/10/2010:svnLENOVO:pn08946MG:pvrLENOVOIdeapadU160:rvnLENOVO:rnMoutCook:rvrNotApplicable:cvnLENOVO:ct10:cvrN/A:
dmi.product.name: 08946MG
dmi.product.version: LENOVO Ideapad U160
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[Bryce Harrington (bryce)]

Hey o-zucker,

You filed this bug report against natty, but I see it's still open and
doesn't appear to have much activity recently. So, now that oneiric
is released and stable, this may be a good point for you to upgrade
and re-test if this issue is still present there.

If it's solved in the new release and you think it's worth backporting
the fix, please indicate that. Or if having the fix in the new release
is good enough, feel free to close out the bug (or let us know and we'll
close it.)

If it's not solved, leave the bug report open. I can't promise we'll
get to it (we get way more bugs filed than we can usually get to), but
your testing and feedback can help out if and when we do.

[Launchpad Janitor (janitor)]

[Expired for xserver-xorg-video-intel (Ubuntu) because there has been no activity for 60 days.]