Re: [Bug 741223] Re: Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change
I can confirm this works as well, however it disables _all_ power management and makes the system run very hot as well as not suspending to RAM/hibernating. --Not a desirable solution for a laptop. I will try the latest upstream kernel to see if it helps with ACPI enabled. Regards, Larry On Fri, Nov 4, 2011 at 9:06 PM, Alkis Georgopoulos 741...@bugs.launchpad.net wrote: I filed this bug: http://www.acpica.org/bugzilla/show_bug.cgi?id=931 and a bit later I read of a workaround in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/518002 which is to add acpi_osi=Linux in the kernel command line. Then the brightness keys work, but there's no indicator popup window for the brightness, which is no big deal. ** Bug watch added: www.acpica.org/bugzilla/ #931 http://www.acpica.org/bugzilla/show_bug.cgi?id=931 -- You received this bug notification because you are subscribed to the bug report. https://bugs.launchpad.net/bugs/741223 Title: Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change Status in “linux” package in Ubuntu: Confirmed Bug description: By default whatever the brightness is set to upon power-up/reboot is what Ubuntu will use from GRUB on into the X session. Reading through https://wiki.ubuntu.com/Kernel/Debugging/Backlight I disassembled the ACPI BIOS info (per https://wiki.ubuntu.com/BIOSandUbuntu#Buggy%20DSDT) and found entries for changing the brightness and the correct entries for the display itself. /sys/devices/virtual/backlight/acpi_video0 exists for controlling the brightness but setting the values has no immediate effect on the brightness although the values are saved. However, I have found that if I set /sys/devices/virtual/backlight/acpi_video0/brightness to a specific value it is used the next time the system is rebooted. There is no /proc entry for the display adapter. I am using the latest kernel for natty (2.6.38-020638rc8-generic #201103081151) available and have tried the latest 2.6.37-X kernels without any changes. I have been unable to try the mainline 2.6.38 kernel due to the binutils change, preventing a clean compile. ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: xorg 1:7.6~3ubuntu11 Uname: Linux 2.6.38-020638rc8-generic x86_64 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None 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: 1600x900 edid-base64: AP///wAGr54QAAESAQOAJhV4CkUlnFtVnCcZUFQBAQEBAQEBAQEBAQEBAQEBICtAkGGEFDBAKjMAftYQAAAYDwAg/gBBVU8KICAgICAgICAg/gBCMTczUlcwMSBWMCAKALs= DRM.card0.VGA.1: status: disconnected enabled: disabled dpms: Off modes: edid-base64: Date: Wed Mar 23 14:50:45 2011 DistUpgraded: Fresh install DistroCodename: natty DistroVariant: ubuntu DkmsStatus: virtualbox-ose, 4.0.4, 2.6.38-6-generic, x86_64: installed virtualbox-ose, 4.0.4, 2.6.38-7-generic, x86_64: installed GraphicsCard: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 12) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device [1025:037e] InstallationMedia: Kubuntu 10.04 LTS Lucid Lynx - Release amd64 (20100427.1) MachineType: Acer Aspire 7741 ProcEnviron: LANGUAGE=en_US:en PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-020638rc8-generic root=UUID=d157ada1-7a4a-4f98-b97f-c162916f2f04 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7 Renderer: Unknown SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/03/2010 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: V1.09 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire 7741 dmi.board.vendor: Acer dmi.board.version: V1.09 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.09 dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.09:bd05/03/2010:svnAcer:pnAspire7741:pvrV1.09:rvnAcer:rnAspire7741:rvrV1.09:cvnAcer:ct10:cvrV1.09: dmi.product.name: Aspire 7741 dmi.product.version: V1.09 dmi.sys.vendor: Acer version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.23-1ubuntu5 version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3 version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
[Bug 741223] Re: Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change
Thanks for the suggestions/info, I apologize for the delay in replying. I noticed the delayed/ignored Fn keys for brightness/sound, but that really isn't the problem. There is a disconnect in the kernel ACPI interface between the value stored for the desired brightness and what the hardware uses. For me the value is stored at /sys/devices/pci:00/:00:02.0/backlight/acpi_video0/brightness, which is properly set by the various methods like the Fn keys. I have found that by setting the brightness value and then rebooting it will use the desired brightness after (warm) reboot. The brightness is also saved/restored upon suspend. I am currently using 2.6.39-020639rc1-generic. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/741223 Title: Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 741223] Re: Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change
I tried using acpi_listen and the values for brightness are immediately updated even though the OSD does not appear most of the time. Here's an example: # acpi_listen [1] 27934 # while sleep 1 ; do cat /sys/devices/pci:00/:00:02.0/backlight/acpi_video0/actual_brightness ; done 4 video DD02 0086 5 video DD02 0086 6 video DD02 0086 7 video DD02 0086 8 video DD02 0086 9 9 video DD02 0087 8 video DD02 0087 7 video DD02 0087 6 video DD02 0087 video DD02 0087 4 video DD02 0087 video DD02 0087 video DD02 0087 1 video DD02 0087 video DD02 0087 0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/741223 Title: Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 741223] [NEW] Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change
Public bug reported: By default whatever the brightness is set to upon power-up/reboot is what Ubuntu will use from GRUB on into the X session. Reading through https://wiki.ubuntu.com/Kernel/Debugging/Backlight I disassembled the ACPI BIOS info (per https://wiki.ubuntu.com/BIOSandUbuntu#Buggy%20DSDT) and found entries for changing the brightness and the correct entries for the display itself. /sys/devices/virtual/backlight/acpi_video0 exists for controlling the brightness but setting the values has no immediate effect on the brightness although the values are saved. However, I have found that if I set /sys/devices/virtual/backlight/acpi_video0/brightness to a specific value it is used the next time the system is rebooted. There is no /proc entry for the display adapter. I am using the latest kernel for natty (2.6.38-020638rc8-generic #201103081151) available and have tried the latest 2.6.37-X kernels without any changes. I have been unable to try the mainline 2.6.38 kernel due to the binutils change, preventing a clean compile. ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: xorg 1:7.6~3ubuntu11 Uname: Linux 2.6.38-020638rc8-generic x86_64 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None 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: 1600x900 edid-base64: AP///wAGr54QAAESAQOAJhV4CkUlnFtVnCcZUFQBAQEBAQEBAQEBAQEBAQEBICtAkGGEFDBAKjMAftYQAAAYDwAg/gBBVU8KICAgICAgICAg/gBCMTczUlcwMSBWMCAKALs= DRM.card0.VGA.1: status: disconnected enabled: disabled dpms: Off modes: edid-base64: Date: Wed Mar 23 14:50:45 2011 DistUpgraded: Fresh install DistroCodename: natty DistroVariant: ubuntu DkmsStatus: virtualbox-ose, 4.0.4, 2.6.38-6-generic, x86_64: installed virtualbox-ose, 4.0.4, 2.6.38-7-generic, x86_64: installed GraphicsCard: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 12) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device [1025:037e] InstallationMedia: Kubuntu 10.04 LTS Lucid Lynx - Release amd64 (20100427.1) MachineType: Acer Aspire 7741 ProcEnviron: LANGUAGE=en_US:en PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-020638rc8-generic root=UUID=d157ada1-7a4a-4f98-b97f-c162916f2f04 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7 Renderer: Unknown SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/03/2010 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: V1.09 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire 7741 dmi.board.vendor: Acer dmi.board.version: V1.09 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.09 dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.09:bd05/03/2010:svnAcer:pnAspire7741:pvrV1.09:rvnAcer:rnAspire7741:rvrV1.09:cvnAcer:ct10:cvrV1.09: dmi.product.name: Aspire 7741 dmi.product.version: V1.09 dmi.sys.vendor: Acer version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.23-1ubuntu5 version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3 version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu6 ** Affects: ubuntu Importance: Undecided Status: New ** Tags: amd64 apport-bug kernel natty ubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/741223 Title: Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 741223] Re: Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change
** Attachment added: ACPI disassembly for Differentiated System Description Table https://bugs.launchpad.net/bugs/741223/+attachment/1934200/+files/DSDT.dsl.bz2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/741223 Title: Natty: Unable to adjust brightness for Acer Aspire 5731, requires reboot to reflect change -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
