Comment 30 for bug 518002

Both brightness and sound keys are working fine with fn on 10.10 for me.Hope
your one will get fix soon.

On Tue, Oct 12, 2010 at 2:41 AM, C Pirnat <email address hidden> wrote:

> I can confirm this bug still exists in 10.10 with my acer aspire 7736z
> which has the same video card. I tried the first workaround passing
> arguments to the kernel through grub which fixes the issue.
>
> --
> lucid extensa 5635z backlight dimming not working at all
> https://bugs.launchpad.net/bugs/518002
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux” package in Ubuntu: Triaged
>
> Bug description:
> [Workaround 1]
> For Acer Extensa 5635Z with bios version V0.3219 or newer adding
> acpi_osi=Linux acpi_backlight=legacy as boot parameter resolves the issue.
>
> [Workaround 2]
> See comment #28.
>
> [Report]
> ubuntu lucid-desktop-amd64 20100206 (booting the iso from hd via grub2
> loopback) on acer extensa 5635z:
> the backlight settings are simply ignored. the keys work, the notification
> works (changing according to the key presses), but the display always stays
> at the same full brightness.
>
> boot with acpi=off:
> backlight dimming works. 10 levels are available. surprisingly there is no
> notification. (notification for sound is there)
> warning: a short press of the power button kills the power immediately!
>
> ProblemType: Bug
> AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
> Architecture: amd64
> ArecordDevices:
> **** List of CAPTURE Hardware Devices ****
> card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC0: ubuntu 2832 F.... pulseaudio
> CRDA: Error: [Errno 2] No such file or directory
> Card0.Amixer.info:
> Card hw:0 'Intel'/'HDA Intel at 0xf0700000 irq 22'
> Mixer name : 'Conexant CX20561 (Hermosa)'
> Components : 'HDA:14f15051,10250253,00100000'
> Controls : 14
> Simple ctrls : 7
> Date: Sat Feb 6 11:04:34 2010
> DistroRelease: Ubuntu 10.04
> LiveMediaBuild: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100206)
> MachineType: Acer Extensa 5635Z
> Package: linux-image-2.6.32-12-generic 2.6.32-12.17
> ProcCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz boot=casper
> iso-scan/filename=/boot/iso/hostname/lucid-desktop-amd64.iso noprompt --
> ProcEnviron:
> LANG=en_US.UTF-8
> SHELL=/bin/bash
> ProcVersionSignature: Ubuntu 2.6.32-12.17-generic
> Regression: No
> RelatedPackageVersions: linux-firmware 1.29
> Reproducible: Yes
> SourcePackage: linux
> TestedUpstream: No
> Uname: Linux 2.6.32-12-generic x86_64
> dmi.bios.date: 05/07/2009
> dmi.bios.vendor: Phoenix
> dmi.bios.version: V0.3213
> dmi.board.name: BA50-MV
> dmi.board.vendor: Acer
> dmi.board.version: Not Applicable
> dmi.chassis.type: 10
> dmi.chassis.vendor: Acer
> dmi.chassis.version: N/A
> dmi.modalias:
> dmi:bvnPhoenix:bvrV0.3213:bd05/07/2009:svnAcer:pnExtensa5635Z:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
> dmi.product.name: Extensa 5635Z
> dmi.product.version: Not Applicable
> dmi.sys.vendor: Acer
>
>
>
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>