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#1 2009-07-26 22:05:26

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Unable to set brightness

Ever since I upgraded to 2.6.30, I have been unable to control my laptop's brightness; it's always at max.

grep -R . /proc/acpi/video/*

/proc/acpi/video/UVGA/HDMI/EDID:<not supported>
/proc/acpi/video/UVGA/HDMI/brightness:<not supported>
/proc/acpi/video/UVGA/HDMI/state:state:     0x1d
/proc/acpi/video/UVGA/HDMI/state:query:     0x00
/proc/acpi/video/UVGA/HDMI/info:device_id:    0x0121
/proc/acpi/video/UVGA/HDMI/info:type:         UNKNOWN
/proc/acpi/video/UVGA/HDMI/info:known by bios: no
/proc/acpi/video/UVGA/TV/EDID:<not supported>
/proc/acpi/video/UVGA/TV/brightness:<not supported>
/proc/acpi/video/UVGA/TV/state:state:     0x1d
/proc/acpi/video/UVGA/TV/state:query:     0x00
/proc/acpi/video/UVGA/TV/info:device_id:    0x0200
/proc/acpi/video/UVGA/TV/info:type:         UNKNOWN
/proc/acpi/video/UVGA/TV/info:known by bios: no
/proc/acpi/video/UVGA/LCD/EDID:<not supported>
/proc/acpi/video/UVGA/LCD/brightness:<not supported>
/proc/acpi/video/UVGA/LCD/state:state:     0x1f
/proc/acpi/video/UVGA/LCD/state:query:     0x01
/proc/acpi/video/UVGA/LCD/info:device_id:    0x0110
/proc/acpi/video/UVGA/LCD/info:type:         UNKNOWN
/proc/acpi/video/UVGA/LCD/info:known by bios: no
/proc/acpi/video/UVGA/CRT/EDID:<not supported>
/proc/acpi/video/UVGA/CRT/brightness:<not supported>
/proc/acpi/video/UVGA/CRT/state:state:     0x1f
/proc/acpi/video/UVGA/CRT/state:query:     0x01
/proc/acpi/video/UVGA/CRT/info:device_id:    0x0100
/proc/acpi/video/UVGA/CRT/info:type:         UNKNOWN
/proc/acpi/video/UVGA/CRT/info:known by bios: no
/proc/acpi/video/UVGA/DOS:DOS setting: <0>
/proc/acpi/video/UVGA/POST:<not supported>
/proc/acpi/video/UVGA/POST_info:<not supported>
/proc/acpi/video/UVGA/ROM:<TODO>
/proc/acpi/video/UVGA/info:Switching heads:              yes
/proc/acpi/video/UVGA/info:Video ROM:                    no
/proc/acpi/video/UVGA/info:Device to be POSTed on boot:  no

Whenever I try to adjust the brightness via Fn keys, it spits out the following in dmesg:

ACPI: Failed to switch the brightness

My laptop is an HP dv6618ca.

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#2 2009-07-26 23:47:52

ralvez
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From: Canada
Registered: 2005-12-06
Posts: 1,694
Website

Re: Unable to set brightness

Same here. I think it is a bug in the kernel.

R.

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#3 2009-07-26 23:54:41

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Re: Unable to set brightness

What model laptop do you have?

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#4 2009-07-27 00:37:55

ralvez
Member
From: Canada
Registered: 2005-12-06
Posts: 1,694
Website

Re: Unable to set brightness

Ahadiel wrote:

What model laptop do you have?

I have an Acer Aspire 7720

R.

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#5 2009-07-27 00:58:23

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Re: Unable to set brightness

ralvez wrote:

Same here. I think it is a bug in the kernel.

R.

I've looked around the kernel's bugtracker, but it doesn't seem like anyone's reported it yet.

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#6 2009-07-27 01:09:06

arkham
Member
From: Stockholm
Registered: 2008-10-26
Posts: 516
Website

Re: Unable to set brightness

Have you tried http://bbs.archlinux.org/viewtopic.php?id=73889?

Last edited by arkham (2009-07-27 01:09:38)


"I'm Winston Wolfe. I solve problems."

~ Need moar games? [arch-games] ~ [aurcheck] AUR haz updates? ~

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#7 2009-07-27 01:10:43

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Re: Unable to set brightness

Yup. I've tried all the solutions in that thread.

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#8 2009-07-27 09:30:34

uwinkelvos
Member
Registered: 2009-06-07
Posts: 129

Re: Unable to set brightness

You might try the following, works for me on my hp dv 3550eg.


acpi_backlight=vendor
&&
http://aur.archlinux.org/packages.php?ID=25467

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#9 2009-07-27 18:56:45

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Re: Unable to set brightness

uwinkelvos wrote:

You might try the following, works for me on my hp dv 3550eg.


acpi_backlight=vendor
&&
http://aur.archlinux.org/packages.php?ID=25467

nvidia-bl compiles fine, but whenever I try to load the module, it says,

FATAL: Error inserting nvidia_bl (/lib/modules/2.6.30-ARCH/kernel/drivers/nvidia_bl.ko): No such device

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#10 2009-07-28 05:54:21

uwinkelvos
Member
Registered: 2009-06-07
Posts: 129

Re: Unable to set brightness

I thought your NVIDIA GeForce Go 7150M would be compatible to this driver, but it does not seem to be, sorry.

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#11 2009-07-28 06:11:50

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Re: Unable to set brightness

In the mean time I've downgraded to 2.6.29 and all is well. big_smile

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#12 2009-07-29 05:52:01

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Re: Unable to set brightness

Sorry for the double post.

I came across this while googling. Near the end of the page, they talk about a change in device order between kernels being the cause of their brightness malfunctions.

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#13 2009-07-29 21:22:05

Renan Birck
Member
From: Brazil
Registered: 2007-11-11
Posts: 401
Website

Re: Unable to set brightness

ralvez wrote:
Ahadiel wrote:

What model laptop do you have?

I have an Acer Aspire 7720

R.

So do I, I have the same laptop and saw the same issue. It is a bug on the kernel. The problem will be fixed in kernel 2.6.31, it is caused by this bug:

http://bugzilla.kernel.org/show_bug.cgi?id=13121

If you can rebuild a kernel with the patch http://bugzilla.kernel.org/attachment.cgi?id=22001 , it should fix the problem (it did for me), or - for the time being - stay with 2.6.29 until 2.6.31 comes out.

Last edited by Renan Birck (2009-07-30 01:59:04)

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#14 2009-07-29 22:51:53

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Re: Unable to set brightness

I wonder if that would fix it for me too. Guess I'll rebuild 2.6.30 and find out.

Thanks for the info Renan Birck.

Edit: Could you upload the patch? The attachment ID in your link is invalid.

Edit2: Nevermind, it doesn't look like the patch would fix anything at all for me.

Edit3: I managed to fix my brightness issues on 2.6.30 by adding the following to the end of my kernel line in menu.lst:

ACPI_VIDEO=y VIDEO_OUTPUT_CONTROL=y

Last edited by Ahadiel (2009-07-29 23:08:40)

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#15 2009-09-25 23:00:57

underguiz
Member
Registered: 2007-03-13
Posts: 3

Re: Unable to set brightness

Ahadiel wrote:

I wonder if that would fix it for me too. Guess I'll rebuild 2.6.30 and find out.

Thanks for the info Renan Birck.

Edit: Could you upload the patch? The attachment ID in your link is invalid.

Edit2: Nevermind, it doesn't look like the patch would fix anything at all for me.

Edit3: I managed to fix my brightness issues on 2.6.30 by adding the following to the end of my kernel line in menu.lst:

ACPI_VIDEO=y VIDEO_OUTPUT_CONTROL=y

Thank you, that trick fixed the brighness issue with my dv6000.

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#16 2009-09-27 03:03:16

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Re: Unable to set brightness

underguiz wrote:
Ahadiel wrote:

I wonder if that would fix it for me too. Guess I'll rebuild 2.6.30 and find out.

Thanks for the info Renan Birck.

Edit: Could you upload the patch? The attachment ID in your link is invalid.

Edit2: Nevermind, it doesn't look like the patch would fix anything at all for me.

Edit3: I managed to fix my brightness issues on 2.6.30 by adding the following to the end of my kernel line in menu.lst:

ACPI_VIDEO=y VIDEO_OUTPUT_CONTROL=y

Thank you, that trick fixed the brighness issue with my dv6000.

Which video chipset does your dv6000 have? The brightness issue is back for me -_-

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#17 2009-09-29 13:37:05

kp
Member
Registered: 2009-09-29
Posts: 1

Re: Unable to set brightness

I have a dv6000 as well and am experiencing the same problems. Its gota Geforce 7150M inside it and i am running 2.6.31.

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#18 2009-10-03 01:35:27

Ahadiel
Member
From: Vancouver, BC
Registered: 2008-05-11
Posts: 31
Website

Re: Unable to set brightness

kp wrote:

I have a dv6000 as well and am experiencing the same problems. Its gota Geforce 7150M inside it and i am running 2.6.31.

Sigh, I hope this gets fixed.

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#19 2009-10-08 12:47:50

TheSaint
Member
From: my computer
Registered: 2007-08-19
Posts: 1,523

Re: Unable to set brightness

uwinkelvos wrote:

You might try the following, works for me on my hp dv 3550eg.


acpi_backlight=vendor
&&
http://aur.archlinux.org/packages.php?ID=25467

Long time I'm keeping watch threads about backlight and brightness to see a solution for my Aspire 6935.
Unfortunately also this didn't solve the issue sad

F


do it good first, it will be faster than do it twice the saint wink

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#20 2009-10-10 12:52:25

nicklas
Member
From: Copenhagen
Registered: 2009-04-07
Posts: 5
Website

Re: Unable to set brightness

Ahadiel wrote:

I wonder if that would fix it for me too. Guess I'll rebuild 2.6.30 and find out.

Thanks for the info Renan Birck.

Edit: Could you upload the patch? The attachment ID in your link is invalid.

Edit2: Nevermind, it doesn't look like the patch would fix anything at all for me.

Edit3: I managed to fix my brightness issues on 2.6.30 by adding the following to the end of my kernel line in menu.lst:

ACPI_VIDEO=y VIDEO_OUTPUT_CONTROL=y

I have kernel 2.6.31.3 on my HP 2530p and i also have this issue. I have tried what Ahadiel suggested, but it doesent help.

I really hope the kernel folks get this sorted out.

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