kernel-packages team mailing list archive

[Marwan Tanager <marwan.tngr@xxxxxxxxx>]

On Fri, Aug 23, 2013 at 09:05:34AM -0000, Aditya wrote:
> Thanks Marwan for the detailed description of the bug.

You're welcome.

> I just posted this as a fix for the users who were unable to change
brightness, and I had no idea how deep the roots of this bug are.

And, I don't blame you. I just took it as an oppurtunity for explaining the 
root cause of the problem in order to reduce the amount of trial-and-error for 
poeple experiencing the same problem.

> In my case, both acpi_video0 and acpi_video1 do not work, i.e. the brightness does not change and the system is functional.
> When I use acpi_backlight=vendor things are different even if I disable nmi_watchdog .

But this thread is about the problem of the freeze that happens on some systems 
when adjusting the brightness, not about the issue of the brightness controls 
not working, while the system is functional. Disabling nmi_watchdog just makes 
us avoid this freeze. You are talking about a different issue here.  Maybe you 
need to open a new bug report for this problem.

-- 
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https://bugs.launchpad.net/bugs/1007765

Title:
  brightness adjusting crashes system

Status in “fglrx-installer” package in Ubuntu:
  Confirmed
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  When adjusting my laptops brightness the system crashes.

  what logs do in need to add and how to get them?

  System:
  -- Dell Studio 1558
  -- Ubuntu 12.04

  Video showing the process: http://www.youtube.com/watch?v=Vxp_rWXHnrg
  --- 
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,neg,commands,put]
  CompositorRunning: None
  DistUpgraded: 2012-01-26 12:27:33,165 DEBUG enabling apt cron job
  DistroCodename: precise
  DistroRelease: Ubuntu 12.04
  DistroVariant: ubuntu
  DkmsStatus:
   bcmwl, 5.100.82.38+bdcom, 3.2.0-23-generic, x86_64: installed
   bcmwl, 5.100.82.38+bdcom, 3.2.0-24-generic, x86_64: installed
   fglrx, 8.960, 3.2.0-20-generic, x86_64: installed
   fglrx, 8.960, 3.2.0-23-generic, x86_64: installed
   fglrx, 8.960, 3.2.0-24-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
  GraphicsCard:
   Advanced Micro Devices [AMD] nee ATI RV710 [Mobility Radeon HD 4500/5100 Series] [1002:9553] (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:0413]
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  JockeyStatus:
   xorg:fglrx_updates - ATI/AMD proprietary FGLRX graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
   kmod:wl - Broadcom STA wireless driver (Proprietary, Enabled, In use) [auto-install]
   xorg:fglrx - ATI/AMD proprietary FGLRX graphics driver (Proprietary, Enabled, In use)
  MachineType: Dell Inc. Studio 1558
  NonfreeKernelModules: fglrx wl
  Package: xorg 1:7.6+12ubuntu1
  PackageArchitecture: amd64
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=cd6ba6ea-6e63-41cc-b872-c101873444c6 ro quiet splash
  ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
  Tags:  precise ubuntu
  Uname: Linux 3.2.0-24-generic x86_64
  UpgradeStatus: Upgraded to precise on 2012-01-26 (129 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 09/13/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A10
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A10
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A10
  dmi.modalias: dmi:bvnDellInc.:bvrA10:bd09/13/2010:svnDellInc.:pnStudio1558:pvrA10:rvnDellInc.:rn:rvrA10:cvnDellInc.:ct8:cvrA10:
  dmi.product.name: Studio 1558
  dmi.product.version: A10
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.7.8-0ubuntu1
  version.fglrx-installer: fglrx-installer N/A
  version.ia32-libs: ia32-libs 20090808ubuntu36
  version.libdrm2: libdrm2 2.4.32-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
  version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.2
  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

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