Acer Aspire 5738 cannot change brightness at all

[Pablo]

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

[Pablo (pjferra)]

Stefan: I couldn't run the acpidump command since it said "command not found"

[lordfreak (lordfreak)]

The brightness FN keys are not working in Acer aspire 5732Z
When FN keys are pressed, the brightness notify box apearsh in the top right, but the brightness seems to be at max. all the time.

[Stefan Bader (smb)]

@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.

[lordfreak (lordfreak)]

El lun, 30-11-2009 a las 14:59 +0000, Stefan Bader escribió:

> @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.
>

[Pablo (pjferra)]

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....

[Stefan Bader (smb)]

Hi Pablo, still missing the acpidump output. Please run the following commands:

sudo apt-get install acpidump
sudo acpidump -o acpidump.txt

Then upload the acpidump.txt file.

The grep showed at least the entries that would be related to brightness:

/proc/acpi/video/GFX0/DD03/brightness:levels: 10 20 30 40 50 60 70 80 90 100
/proc/acpi/video/GFX0/DD03/brightness:current: 50

Has the following command any effect?

sudo -i 'echjo 100 >/proc/acpi/video/GFX0/DD03/brightness'; cat /proc/acpi/video/GFX0/DD03/brightness

[Pablo (pjferra)]

Hi Stefan,

Sorry for de missing file. I forgot it since your request layed on the other
thread of conversation.
It's attached now.

The command had no effect than to change the "supposed" brightness level to
100%.

I had tried it before, and it changes the /proc/acpi/video/GFX0/DD03 file as
well as the Fn keys or the brightness applet in the pannel, but has no real
effect ont the screen brightness.

Hope you'll find the problem...

>

2009/12/10 Stefan Bader <email address hidden>

> Hi Pablo, still missing the acpidump output. Please run the following
> commands:
>
> sudo apt-get install acpidump
> sudo acpidump -o acpidump.txt
>
> Then upload the acpidump.txt file.
>
> The grep showed at least the entries that would be related to
> brightness:
>
> /proc/acpi/video/GFX0/DD03/brightness:levels: 10 20 30 40 50 60 70 80 90
> 100
> /proc/acpi/video/GFX0/DD03/brightness:current: 50
>
> Has the following command any effect?
>
> sudo -i 'echjo 100 >/proc/acpi/video/GFX0/DD03/brightness'; cat
> /proc/acpi/video/GFX0/DD03/brightness
>
> --
> 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...

[Stefan Bader (smb)]

So from that ACPI code it seems that giving you the brightness interface is rather the bug than it not working. There are multiple definitions for video devices (this is normal). One of them would probably show up under VGA (or PEGP), the other GFX0 is the one that seems to be present on your system. However the ACPI BIOS only defines functions to control brightness for the other device. Which makes it unlikely that using the functions on the other device has any effect on your real video device.

A dumb question in between: did brightness control ever work with Linux? If yes, which version? Somehow my guess would have been that acpi_backlight=vendor should allow the acer-wmi module to have a try on this. But did not work. Still, could you booth with that option and send me the dmesg from that? Also check whether there is something under /sys/class/backlight (thought I would suspect no).

[Pablo (pjferra)]

Stefan,

Here is the dmesg log while booting with the acpi_backlight=vendor option.
The only change I notice is that the brightness applet on the panel says it
can't get the brightness level.

To your question: with this model of Acer notebook brightness control did
work douring the brief time between the patched kernel you upload (while I
was using Ubuntu 9.04) and the following kernel update. After that I could
not go back.

Under /sys/class/backlight ther is only a shortcut to a directory named
acer-wmi (look at the attached image)

I've installed 9.04 again on another disk partition of the same laptop. I
attached 2 files:
* dmesg-9.04-01.txt (obtained with 9.04 just installed; brightness control
doesn't work)
* dmesg-9.04-02.txt (after installing the patched kernel; brightness
control works fine)

I hope it would help

2009/12/14 Stefan Bader <email address hidden>

> So from that ACPI code it seems that giving you the brightness interface
> is rather the bug than it not working. There are multiple definitions
> for video devices (this is normal). One of them would probably show up
> under VGA (or PEGP), the other GFX0 is the one that seems to be present
> on your system. However the ACPI BIOS only defines functions to control
> brightness for the other device. Which makes it unlikely that using the
> functions on the other device has any effect on your real video device.
>
> A dumb question in between: did brightness control ever work with Linux?
> If yes, which version? Somehow my guess would have been that
> acpi_backlight=vendor should allow the acer-wmi module to have a try on
> this. But did not work. Still, could you booth with that option and send
> me the dmesg from that? Also check whether there is something under
> /sys/class/backlight (thought I would suspect no).
>
> --
> 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: 2954e74ba17fb0e37fc942c...

[3esmit (3esmit)]

Hello, I have the same notebook model, and this is a problem. Ubuntu idenfies the commands in keyboard to change brightness and it try to change it.. The brightness "tooltip" comes in the right top corner, but it have just a few steps (6 steps), and it does not change a thing. Is intersting that the fadeout that heppens when its going to screensaver happens, and it automatically turn off the monitor too.

Adding the parameter acpi_backlight=vendor to the kernel in grub makes the brightness change, but it have too much steps, and it works very buggy (changes automatticaly very crazy, when lighting up it goes all dark, and comes back to where you was... very annoying), so I prefer not using this workaround, since its worst then not having the adjust brightness option.

In Fedora 11 the brightness works perfectly in Acer 5738. I didnt tested the Fedora 12 yet.

Thank you.

[3esmit (3esmit)]

Sorry, I just retested the acpi_backlight=vendor parameter in grub, and with the latest updates its working perfect.. The last time I've tested was in jaunty. This really fixed and works perfect.

I've just updated my /etc/default/grub with that option and the changed line its just like this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset i8042.nomux acpi_backlight=vendor"

Just to explain:
- nomodeset: makes something show up in the screen (fix the videodriver)
- i8042.nomux: makes the touchpad button work.
- acpi_backlight=vendor: fix the brightness problem.

Now just do the update-grub cmd. Remeber that this changes need root privilegies, so "sudo su" or "sudo <cmd>"

[3esmit (3esmit)]

Just forgot an important information: Im on Karmic Koala x64
Launchpad needs a edit option.

[Pablo (pjferra)]

3esmit,
Thank you very much. It solved the brightness problem, and also the touchpad
one. Two goals with one shot.

Stefan,
Thank you a lot. I really apreciate your very long effort.

There are a couple of things I would like to comment, and a little problem I
wish solve (related to this topic) and perhaps any of you could help me:

1) From the changes in the boot options, the ubuntu logo that is shown at
the beginning and when shutting down, appears elongated in the with of the
screen (just an observation)
2) A curious behaviour of this lovely machine is that sometimes it boots
with the brightness quite attenuated. I've tried it several times before and
after the last changes, and it happense randomly: sometimes it doesn't get
the full bright.

THE PROBLEM) The previous step I had taken was to install a 9.04 version on
a small disk partition. Now the grub responds to that installation, and so
to set the boot options I had to edit the /boot/grub/menu.lst file of 9.04
installation, since update-grub changes the /boot/grub/grub.cfg file of 9.10
installation. The question is: How could I restore the previous grub, so
that it works normally from 9.10?

Thanks again, and have a happy new year!!!

2009/12/19 3esmit <email address hidden>

> Just forgot an important information: Im on Karmic Koala x64
> Launchpad needs a edit option.
>
> --
> 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/...

[Pablo (pjferra)]

Another thing:

3esmit, could you explain to me what does the i8042.nomux option do?

2009/12/20 Pablo Javier Ferrari Ferrando <email address hidden>

> 3esmit,
> Thank you very much. It solved the brightness problem, and also the
> touchpad one. Two goals with one shot.
>
> Stefan,
> Thank you a lot. I really apreciate your very long effort.
>
> There are a couple of things I would like to comment, and a little problem
> I wish solve (related to this topic) and perhaps any of you could help me:
>
> 1) From the changes in the boot options, the ubuntu logo that is shown at
> the beginning and when shutting down, appears elongated in the with of the
> screen (just an observation)
> 2) A curious behaviour of this lovely machine is that sometimes it boots
> with the brightness quite attenuated. I've tried it several times before and
> after the last changes, and it happense randomly: sometimes it doesn't get
> the full bright.
>
> THE PROBLEM) The previous step I had taken was to install a 9.04 version on
> a small disk partition. Now the grub responds to that installation, and so
> to set the boot options I had to edit the /boot/grub/menu.lst file of 9.04
> installation, since update-grub changes the /boot/grub/grub.cfg file of 9.10
> installation. The question is: How could I restore the previous grub, so
> that it works normally from 9.10?
>
> Thanks again, and have a happy new year!!!
>
>
>
>
> 2009/12/19 3esmit <email address hidden>
>
> Just forgot an important information: Im on Karmic Koala x64
>> Launchpad needs a edit option.
>>
>> --
>> 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)
>> MachineTyp...

[Syarif (psychicmind9)]

i have a simple and working solution.
i tried it out and its working like a charm.
i post it here:

https://bugs.launchpad.net/ubuntu/+source/acpid/+bug/392948?comments=all

seek for my post.

[lordfreak (lordfreak)]

Hi, thanks for the workaround, is not a solution for the problem, but is
a nice way to work with my laptop without get blind xDDDDD

-----Mensaje original-----
De: Syarif <email address hidden>
Reply-to: Bug 489041 <email address hidden>
Para: <email address hidden>
Asunto: [Bug 489041] Re: Acer Aspire 5738 cannot change brightness at
all
Fecha: Wed, 23 Dec 2009 04:29:32 -0000

                                De:
Syarif <email address hidden>
                          Reply-to:
Bug 489041
<email address hidden>
                              Para:
<email address hidden>
                            Asunto:
[Bug 489041] Re: Acer Aspire 5738
cannot change brightness at all
                             Fecha:
23/12/09 05:29:32 (Wed, 23 Dec 2009
04:29:32 -0000)

i have a simple and working solution.
i tried it out and its working like a charm.
i post it here:

https://bugs.launchpad.net/ubuntu/+source/acpid/+bug/392948?comments=all

seek for my post.

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Acer Aspire 5738 cannot change brightness at all
https://bugs.launchpad.net/bugs/489041
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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_...

[Томица (tomica-korac)]

3esmit thank you so much, your solution worked great. Well, almost.... My touchpad on/off button is working now, but for some reason my touchpad's scrolling area isn't. I can scroll down, but when I try scrolling up, the active window scrolls down again. such problem didn't exist before trying this work-around. Any idea why this happens? I noticed the same behavior on Windows XP, but it went away after I installed touchpad drivers.

Also, the brightness control is working great now, except for that it sometimes changes 'on it's own'. But that's not much of a problem to me, at least for now.

[Brad Figg (brad-figg)]

This bug was filed against a series that is no longer supported and so is being marked as Won't Fix. If this issue still exists in a supported series, please file a new bug.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.