MacBook: Backlight doesn't turn on at (or after) unlock screen

[Matthew Paul Thomas]

MacBook early 2008 model, Intel® 965GM x86/MMX/SSE2
MacBook Pro 2011 model

Problem occurs with: Ubuntu 11.10
Does not occur with: Ubuntu 11.04, Ubuntu 10.10, Ubuntu 10.04, etc

1. Choose “Lock Screen”.
2. Wait for the backlight to turn off.
3. Press a key or touch a pointing device.
4. Press one of the brightness keys on the keyboard.
5. Enter your password at the unlock screen.
6. Press one of the brightness keys on the keyboard.

What happens:
3. The unlock screen appears, but it is almost invisible, because the backlight has not turned back on.
4. The backlight still does not turn on.
5. The backlight still does not turn on.
6. When you choose to increase/decrease the brightness, the backlight finally turns on.

What should happen:
3. The backlight turns on immediately.

This looks similar to bug 580225, except that that bug was occurring with Ubuntu 10.04, whereas this bug was not.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
NonfreeKernelModules: wl
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu3
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,move,grid,place,resize,vpswitch,regex,snap,compiztoolbox,gnomecompat,animation,imgpng,mousepoll,workarounds,session,wall,fade,expo,unitymtgrabhandles,scale,ezoom,unityshell]
CompositorRunning: compiz
Date: Mon Oct 10 16:02:31 2011
DistUpgraded: Log time: 2011-09-20 11:13:24.477175
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 5.100.82.38+bdcom, 2.6.38-11-generic, i686: installed
 bcmwl, 5.100.82.38+bdcom, 3.0.0-11-generic, i686: installed
 bcmwl, 5.100.82.38+bdcom, 3.0.0-12-generic, i686: installed
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Apple Computer Inc. Device [106b:00a1]
   Subsystem: Apple Computer Inc. Device [106b:00a1]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: Apple Inc. MacBook4,1
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=136588bc-9f5d-4ea2-abe3-91e4b5a4f747 ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to oneiric on 2011-09-20 (20 days ago)
dmi.bios.date: 02/09/08
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MB41.88Z.00C1.B00.0802091535
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F22788A9
dmi.board.vendor: Apple Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 2
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F22788A9
dmi.modalias: dmi:bvnAppleInc.:bvrMB41.88Z.00C1.B00.0802091535:bd02/09/08:svnAppleInc.:pnMacBook4,1:pvr1.0:rvnAppleInc.:rnMac-F22788A9:rvrPVT:cvnAppleInc.:ct2:cvrMac-F22788A9:
dmi.product.name: MacBook4,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu3
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Demelor (demelor-l)]

Has the same problem with HP Mini 110c netbook with Intel integrated graphics.

[Launchpad Janitor (janitor)]

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

[Lukas Grossar (lukas-grossar)]

Same with me!

Backlight worked fine on my MacBook 2,1 in 11.04, but with 11.10 I've got the same behavior as described above.

[Matthew Paul Thomas (mpt)]

This bug is no longer happening for me in Pangolin. If it still affects anyone else who has upgraded, please set it back to Confirmed. Thanks.

[bugbot (bugbot)]

We're closing this bug since there has not been a response from the original reporter. However, the issue still exists please feel free to reopen with the requested information. If you're not the original reporter, we'd prefer you file a new bug report.

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