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[Bug 1510668] [NEW] No screen backlight after suspending and resuming on Macbook 4.1

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: Arvid Krein <1510668@xxxxxxxxxxxxxxxxxx>
Date: Tue, 27 Oct 2015 19:21:39 -0000
Reply-to: Bug 1510668 <1510668@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

Hardware:
Macbook-4.1 2008
Graphics: Intel® 965GM
 

Software:
ubuntu 15.10

tested kernels:
4.3.0-999-generic
4.1.0-040100rc2-genereic

expected:
After performing a suspend and resuming the screen back light is turned back on.

observed:
When trying to suspend and wake up after, the device comes back on but the screen back light stays off. If shined on with an external light source the content of the screen is still readable.

steps to reproduce:
1.   suspend (via pm-suspend, user interface, or automatic behavior
2.   attempt to wake up
3.   observe the back light of the screen

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
Uname: Linux 4.3.0-999-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Tue Oct 27 19:35:49 2015
DistUpgraded: 2015-10-25 04:06:39,623 DEBUG enabling apt cron job
DistroCodename: wily
DistroVariant: ubuntu
DkmsStatus: webcamstudio, 0.73, 4.2.0-16-generic, x86_64: installed
DpkgLog:
 
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Apple Inc. Device [106b:00a1]
   Subsystem: Apple Inc. Device [106b:00a1]
InstallationDate: Installed on 2015-08-12 (76 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: Apple Inc. MacBook4,1
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.3.0-999-generic root=UUID=c4a2c5bc-c7c6-4887-a1e1-74ab339c4c7d ro acpi_osi=Linux acpi_baclight=vendor
SourcePackage: xorg
Symptom: display
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: Upgraded to wily on 2015-10-25 (2 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 1:0.9.12.2+15.10.20151015-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Sun Mar 24 12:22:50 2024
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                5156 
 vendor                                     AUO
xserver.version: 2:1.17.2-1ubuntu9

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 suspend ubuntu

** Attachment added: "dmesg.txt"
   https://bugs.launchpad.net/bugs/1510668/+attachment/4506885/+files/dmesg.txt

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https://bugs.launchpad.net/bugs/1510668

Title:
  No screen backlight after suspending and resuming on Macbook 4.1

Status in xorg package in Ubuntu:
  New

Bug description:
  Hardware:
  Macbook-4.1 2008
  Graphics: Intel® 965GM
   

  Software:
  ubuntu 15.10

  tested kernels:
  4.3.0-999-generic
  4.1.0-040100rc2-genereic

  expected:
  After performing a suspend and resuming the screen back light is turned back on.

  observed:
  When trying to suspend and wake up after, the device comes back on but the screen back light stays off. If shined on with an external light source the content of the screen is still readable.

  steps to reproduce:
  1.   suspend (via pm-suspend, user interface, or automatic behavior
  2.   attempt to wake up
  3.   observe the back light of the screen

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: xorg 1:7.7+7ubuntu4
  Uname: Linux 4.3.0-999-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.19.1-0ubuntu3
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Tue Oct 27 19:35:49 2015
  DistUpgraded: 2015-10-25 04:06:39,623 DEBUG enabling apt cron job
  DistroCodename: wily
  DistroVariant: ubuntu
  DkmsStatus: webcamstudio, 0.73, 4.2.0-16-generic, x86_64: installed
  DpkgLog:
   
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 03) (prog-if 00 [VGA controller])
     Subsystem: Apple Inc. Device [106b:00a1]
     Subsystem: Apple Inc. Device [106b:00a1]
  InstallationDate: Installed on 2015-08-12 (76 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Apple Inc. MacBook4,1
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.3.0-999-generic root=UUID=c4a2c5bc-c7c6-4887-a1e1-74ab339c4c7d ro acpi_osi=Linux acpi_baclight=vendor
  SourcePackage: xorg
  Symptom: display
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: Upgraded to wily on 2015-10-25 (2 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 1:0.9.12.2+15.10.20151015-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.64-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
  xserver.bootTime: Sun Mar 24 12:22:50 2024
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                5156 
   vendor                                     AUO
  xserver.version: 2:1.17.2-1ubuntu9

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Follow ups

[Bug 1510668] Re: No screen backlight after suspending and resuming on Macbook 4.1
From: Christopher M. Penalver, 2015-11-01