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. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1007765/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
