Comment 6 for bug 489041

Here it is...

2009/11/30 Stefan Bader <email address hidden>

> @Pablo: "sudo apt-get install acpidump" will install the required
> package. As the vendor option does not work, boot without it and also
> add the "grep -r . /proc/aci/video"
>
> @lordfreak, even though it is pretty similar (or the same), please
> use/create a new bug for that. You have a different laptop model then
> Pablo and more often than not, this results in different issues. It is
> better to dup things later, when finding, that things really are the
> same issue. Thanks a lot.
>
> --
> Acer Aspire 5738 cannot change brightness at all
> https://bugs.launchpad.net/bugs/489041
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux” package in Ubuntu: New
>
> Bug description:
> Cannot change bringhtness at all.
> The Fn keys seem to work properly because they make appear the brightness
> indicator on the upper right corner of the screen, but nothing changes
> actually.
> The panel brightness applet has the same behaviour: it seems to work but
> nothing changes.
> When booting with "acpi_backlight=vendor" grub option no change is noticed
> on the screen, but the brightness applet says "cannot get laptop panel
> brightness" instead of the (supposed) brightness level, when the mouse
> pointer stands over it.
>
> ProblemType: Bug
> Architecture: amd64
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC0: pablo 2018 F.... pulseaudio
> CRDA: Error: [Errno 2] No existe el fichero ó directorio
> Card0.Amixer.info:
> Card hw:0 'Intel'/'HDA Intel at 0xf4700000 irq 21'
> Mixer name : 'Intel G45 DEVCTG'
> Components : 'HDA:10ec0888,10250205,00100202
> HDA:11c11040,11c10001,00100200 HDA:80862802,80860101,00100000'
> Controls : 32
> Simple ctrls : 17
> CheckboxSubmission: 18910bafd566e5c734482b08b2d8ab4f
> CheckboxSystem: 2954e74ba17fb0e37fc942cd1d9fab4e
> Date: Fri Nov 27 01:32:58 2009
> DistroRelease: Ubuntu 9.10
> HibernationDevice: RESUME=UUID=4b70a427-6b21-4555-b5d7-30a84e1b1713
> InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
> MachineType: Acer Aspire 5738
> Package: linux-image-2.6.31-15-generic 2.6.31-15.50
> ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-15-generic
> root=UUID=4d713b24-5215-4100-bec9-749b6fb4330e ro quiet splash
> ProcEnviron:
> LANG=es_UY.UTF-8
> SHELL=/bin/bash
> ProcVersionSignature: Ubuntu 2.6.31-15.50-generic
> RelatedPackageVersions:
> linux-backports-modules-2.6.31-15-generic N/A
> linux-firmware 1.25
> SourcePackage: linux
> Uname: Linux 2.6.31-15-generic x86_64
> XsessionErrors:
> (gnome-settings-daemon:2030): GLib-CRITICAL **: g_propagate_error:
> assertion `src != NULL' failed
> (gnome-settings-daemon:2030): GLib-CRITICAL **: g_propagate_error:
> assertion `src != NULL' failed
> (nautilus:2124): Eel-CRITICAL **: eel_preferences_get_boolean: assertion
> `preferences_is_initialized ()' failed
> (polkit-gnome-authentication-agent-1:2146): GLib-CRITICAL **:
> g_once_init_leave: assertion `initialization_value != 0' failed
> (gnome-panel:2123): Gdk-WARNING **:
> /build/buildd/gtk+2.0-2.18.3/gdk/x11/gdkdrawable-x11.c:952 drawable is not a
> pixmap or window
> dmi.bios.date: 04/11/2009
> dmi.bios.vendor: Phoenix Technologies LTD
> dmi.bios.version: V1.05.
> dmi.board.name: JV50
> dmi.board.vendor: Acer
> dmi.board.version: Rev
> dmi.chassis.type: 10
> dmi.chassis.vendor: Acer
> dmi.chassis.version: N/A
> dmi.modalias:
> dmi:bvnPhoenixTechnologiesLTD:bvrV1.05.:bd04/11/2009:svnAcer:pnAspire5738:pvr0100:rvnAcer:rnJV50:rvrRev:cvnAcer:ct10:cvrN/A:
> dmi.product.name: Aspire 5738
> dmi.product.version: 0100
> dmi.sys.vendor: Acer
>